CN114765300B - Antenna device and electronic equipment - Google Patents

Abstract

The embodiment of the application provides an antenna device and electronic equipment, wherein a main radiating arm of the antenna device comprises a circular side wall and a top wall, and the circular side wall, the top wall and a metal floor are enclosed together to form a radiating cavity with an opening at one side, so that after a feeding structure in the radiating cavity feeds signal current to the main radiating arm, electromagnetic waves in the radiating cavity radiate to the front of a screen of the electronic equipment to a greater extent through the opening in the circular side wall, and electromagnetic waves radiated to other areas are effectively reduced due to the blocking of the circular side wall, thereby improving the forward gain of the antenna device on a frequency band of 2.4Gwifi and other frequency bands, and reducing the directivity coefficient of the antenna device on a frequency band of 2.4Gwifi and other frequency bands.

Description

Antenna device and electronic equipment

Technical Field

The embodiment of the application relates to the technical field of electronic equipment, in particular to an antenna device and electronic equipment.

Background

In engineering systems such as radio communication, broadcast television, radar, navigation in aviation navigation, etc., it is necessary to use radio waves to transfer information to complete the operation of the entire system, and antennas are the basic devices used to transmit or receive radio waves in these systems. Taking a television as an example, in order to meet the demands of people on the aspects of ultra-high definition video, cloud games, VR experience, television remote education and the like, a 5G antenna with the characteristics of being capable of completing large data volume transmission, ultra-large network capacity and the like is arranged on the television to receive or send signals, so that information transmission with other equipment and the like is realized.

In the conventional art, a television includes a television body and an antenna device, the antenna device is disposed on a back plate of the television body, and the antenna device is located at a position of the back plate near a bottom corner. Currently, the antenna device is usually an inverted F-shaped antenna (INVERTED F ANTENNA, abbreviated as IFA) or a planar inverted F-shaped antenna (PLANE INVERTED F ANTENNA, abbreviated as PPIFA), and electromagnetic waves are radiated in all directions through the radiator of the IFA/PIFA antenna, so that part of the electromagnetic waves emitted by the antenna device can be radiated to the front of the screen of the television body through the side of the television body, and the purpose of transmitting signals through the position in front of the screen is achieved.

However, the conventional antenna device has an open structure, i.e., the sides are all open structures, so that the directivity coefficient of the 2.4Gwifi frequency band of the antenna device is high, and the forward gain (the gain of electromagnetic waves radiated to the front of the screen) is low, thereby affecting the performance of the front-screen antenna of electronic devices such as televisions.

Disclosure of Invention

The embodiment of the application provides an antenna device and electronic equipment, which can solve the problem that the front-screen antenna performance of the electronic equipment is affected by the fact that the directivity coefficient of the antenna equipment in the traditional electronic equipment in the frequency band of 2.4Gwifi is high and the forward gain is low.

The embodiment of the application provides an antenna device which is used for being fixed on a backboard of electronic equipment and comprises a metal floor, a main radiating arm and a feed structure, wherein the metal floor is used for being fixed with the backboard of the electronic equipment, the main radiating arm comprises an annular side wall and a top wall, the top wall is opposite to the metal floor, one end of the annular side wall is connected with the top wall, the other end of the annular side wall is connected with the metal floor, an opening is formed in the annular side wall and faces the edge of the backboard of the electronic equipment, the feed structure is located in a radiating cavity formed by the main radiating arm and the metal floor in a surrounding mode, and the feed structure is used for feeding signal current to the main radiating arm.

According to the embodiment of the application, the main radiating arm of the antenna device is arranged to comprise the annular side wall and the top wall, and the annular side wall, the top wall and the metal floor are jointly enclosed to form the radiating cavity with the opening at one side, so that after the feeding structure in the radiating cavity feeds signal current to the main radiating arm, electromagnetic waves in the radiating cavity radiate to the front of a screen of the electronic device to a greater extent through the opening on the annular side wall, and electromagnetic waves radiated to other areas are effectively reduced due to the blocking of the annular side wall, so that the forward gain of the antenna device in the frequency range of 2.4Gwifi and other frequency ranges is improved, and the directivity coefficient of the antenna device in the frequency range of 2.4Gwifi and other frequency ranges is reduced. Meanwhile, the antenna device is arranged into a cavity structure with an opening on the side wall, so that a plurality of resonance points can be excited in the feeding process, the bandwidth of the antenna device is widened, more frequency bands can be covered, and the antenna performance of the antenna device is improved. In addition, because the antenna device of the embodiment of the application is of a cavity structure with the side wall provided with the opening, namely, other areas except the opening are of a closed structure, the distribution of signal current is more concentrated than that of the traditional antenna device, so that the interference of an external environment such as a horizontally polarized antenna or a vertically polarized antenna and other interference sources on the antenna device is reduced, the layout of the antenna device is facilitated, and the interference on other antenna devices is avoided.

In an alternative implementation manner, the feed structure comprises a first part, a second part and a third part which are sequentially connected, the second part is arranged opposite to the metal floor, and one ends of the first part and the third part, which are far away from the second part, extend towards the direction of the metal floor;

the metal floor has a feed port thereon, one of the first and third portions being connected to the feed port, and the other of the first and third portions being connected to the metal floor.

According to the embodiment of the application, the power feeding structure is in an inverted U-shaped structure, so that one end of the power feeding structure is connected with the power feeding port, and the other end of the power feeding structure is connected with the metal floor, impedance matching of the power feeding structure is facilitated, power loss in the power feeding structure is reduced, return loss of the antenna device is effectively reduced, and antenna gain is improved.

In an alternative implementation, there is a first gap between the second portion and the top wall to enable gap-coupled feeding between the feed structure and the main radiating arm.

In an alternative implementation, the antenna device further comprises a secondary radiating arm, the secondary radiating arm being disposed within the radiating cavity.

According to the embodiment of the application, the auxiliary radiating arm is arranged in the radiating cavity enclosed by the main radiating arm and the metal floor, so that the signal current in the main radiating arm or the radiating cavity is fed to the auxiliary radiating arm, and the signal current is formed on the auxiliary radiating arm, so that the electromagnetic wave is radiated, the antenna device excites more resonance points, the bandwidth of the whole antenna device is widened, the antenna device can cover more frequency bands, and the utilization rate of the antenna device is improved.

In an alternative implementation manner, one end of the auxiliary radiation arm, which faces the metal floor, extends onto the metal floor, a second gap is formed between one end of the auxiliary radiation arm, which faces the top wall, and the auxiliary radiation arm, the second gap and the top wall form a filtering structure, so that the auxiliary radiation arm is coupled to feed in high-frequency-band signal current, low-frequency signal current is filtered, and electromagnetic wave signals in the high frequency band are excited through the auxiliary radiation arm.

Or a third gap is formed between one end of the auxiliary radiation arm, which faces the metal floor, and one end of the auxiliary radiation arm, which faces the top wall, extends to the top wall, and the auxiliary radiation arm, the third gap and the metal floor jointly form a filtering structure, so that the auxiliary radiation arm is coupled to feed in high-frequency-band signal current, low-frequency signal current is filtered, and electromagnetic wave signals in the high frequency band are excited through the auxiliary radiation arm.

In an alternative implementation, the annular side wall includes a first side wall, a second side wall, and a third side wall connected in sequence;

The first side wall and the third side wall are oppositely arranged, the second side wall is located between the first side wall and the third side wall, an opening is formed in a gap between one ends, far away from the second side wall, of the first side wall and the third side wall, and the first side wall, the second side wall and the third side wall are all configured into a planar structure.

According to the embodiment of the application, the annular side wall is formed by sequentially connecting the three planar side walls, and the annular side wall, the top wall and the metal floor are ensured to be enclosed into the radiation cavity with one surface being open and the other surface being closed, so that the forward gain of 2.4Gwifi frequency bands is improved, the directivity coefficient of 2.4Gwifi frequency bands of the antenna device is reduced, the structure of the main radiation arm is simplified, and the manufacturing efficiency of the antenna device is improved.

In an alternative implementation manner, the feed structure is located between the auxiliary radiation arm and the third side wall of the annular side wall of the antenna device, and the distance between the auxiliary radiation arm and the third side wall is 1/3-1/2 of the distance between the first side wall and the third side wall of the annular side wall, and the distance between the feed structure and the third side wall is smaller than 1/3 of the distance between the first side wall and the third side wall;

Or the feed structure is positioned between the auxiliary radiation arm and the first side wall, the distance between the auxiliary radiation arm and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall, and the distance between the feed structure and the first side wall is smaller than 1/3 of the distance between the first side wall and the third side wall.

According to the embodiment of the application, the feed structure and the auxiliary radiation arm are respectively arranged at the set positions between the first side wall and the third side wall of the annular side wall, so that the antenna device excites four different radiation modes to generate four resonance points and cover 2.4GHz, 3.6GHz, 5GHz and 5.5GHz, and the antenna device of the embodiment of the application can be applied to cover wifi 2.4G and wifi 5G, and can also be applied to NR frequency bands, N41 frequency bands, N78 frequency bands and N79 frequency bands.

In an alternative implementation manner, the feed structure is located between the auxiliary radiation arm and the third side wall of the annular side wall of the antenna device, the distance between the auxiliary radiation arm and the third side wall is 1/3-1/2 of the distance between the first side wall and the third side wall of the annular side wall, and the distance between the feed structure and the third side wall is 1/3-1/2 of the distance between the first side wall and the third side wall;

or the feed structure is positioned between the auxiliary radiation arm and the first side wall, the distance between the auxiliary radiation arm and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall, and the distance between the feed structure and the first side wall is 1/3-1/2 of the distance between the first side wall and the third side wall.

According to the embodiment of the application, the feeding structure and the auxiliary radiating arm are respectively arranged at the set positions between the first side wall and the third side wall of the annular side wall, so that the antenna device excites five different radiation modes to generate five resonance points, and the five resonance points cover 2.45GHz, 3.9GHz, 4.9GHz, 5.5GHz and 6.4GHz, so that the antenna device can be applied to covering wifi 2.4G and wifi 5G, and can also be applied to NR frequency bands, N41 frequency bands, N78 frequency bands and N79 frequency bands, and can also be applied to future sub 8G and wifi 6 and the like.

In an alternative implementation manner, the side wall of the auxiliary radiating arm of the antenna device is provided with external threads, the top wall or the metal floor is provided with internal threads, and the auxiliary radiating arm is in threaded connection with the top wall or the metal floor.

According to the embodiment of the application, the external threads are arranged on the auxiliary radiating arm, and the internal threads are arranged on the top wall or the metal floor of the antenna device, so that when the auxiliary radiating arm is in threaded fit connection with the top wall, the auxiliary radiating arm can be rotated to stably adjust the distance between the auxiliary radiating arm and the metal floor, thereby rapidly adjusting the electromagnetic wave frequency band excited by the auxiliary radiating arm, or when the auxiliary radiating arm is in threaded fit connection with the metal floor, the auxiliary radiating arm can be rotated to stably adjust the distance between the auxiliary radiating arm and the top wall, thereby rapidly adjusting the electromagnetic wave frequency band excited by the auxiliary radiating arm, not only conveniently adjusting the height of one end of the auxiliary radiating arm, but also simplifying the connection structure between the auxiliary radiating arm and the metal floor or the top wall, and further improving the assembly efficiency of the whole antenna device. In addition, the connection strength between the auxiliary radiating arm and the metal floor or the connection strength between the auxiliary radiating arm and the top wall are also enhanced.

The embodiment of the application also provides electronic equipment, which comprises an electronic equipment body and at least one antenna device;

the antenna device is fixed on the backboard of the electronic equipment body, and the opening of the antenna device faces any side edge of the backboard.

According to the embodiment of the application, the antenna device is arranged on the backboard of the electronic equipment body, so that electromagnetic waves radiated by the antenna device radiate to the front of the screen of the electronic equipment through the opening of the antenna device, and electromagnetic waves radiated to other areas are effectively reduced due to the blocking of the annular side wall of the antenna device, so that the forward gain of the antenna device on the frequency band of 2.4Gwifi and other frequency bands is improved, and the directivity coefficient of the antenna device on the frequency band of 2.4Gwifi and other frequency bands is reduced. In addition, through setting up antenna device to the cavity structure that the lateral wall has the opening, can arouse a plurality of resonance points in feed in-process to widen antenna device's bandwidth, make it can cover more frequency channels, improved antenna device's antenna performance, and then optimized electronic equipment's display performance and function demand.

In an alternative implementation, the back plate is a metal back plate, and the metal back plate is configured as a metal floor of the antenna device, so that the structure of the antenna device and the electronic equipment is simplified, the manufacturing cost of the electronic equipment is reduced, the assembly efficiency of the electronic equipment is improved, and meanwhile, the weight of the electronic equipment is reduced.

In an alternative implementation, the number of antenna devices is at least two, and at least two antenna devices are respectively disposed on two adjacent sides of the back plate.

According to the embodiment of the application, at least one antenna device is respectively arranged on two adjacent side edges of the backboard, so that the two antenna devices can form wifi MIMO layout, thereby enhancing the radiation intensity of the antenna device on the electronic equipment, and simultaneously widening the coverage frequency range of the antenna device on the electronic equipment, thereby improving the signal transmission performance of the electronic equipment. In addition, each antenna device is of a cavity structure with an opening at one side, so that isolation among the antenna devices is improved, and signal interference among the antennas is avoided. Meanwhile, far field patterns of two antenna devices positioned on two adjacent sides are complementary, so that continuity of coverage frequency bands of the formed wifi MIMO antenna is ensured.

In an alternative implementation, the horizontal distance between at least two antenna devices is at least 18mm, and the vertical distance between at least two antenna devices is at least 27mm, so as to further improve the isolation between the two antenna devices and ensure that the two antenna devices do not interfere with each other.

In an alternative implementation, at least two antenna devices are arranged at intervals on at least one of the two adjacent sides.

According to the embodiment of the application, the plurality of antenna devices are arranged at intervals on one side edge of the backboard, so that the space of the backboard of the electronic equipment is reasonably utilized, the radiation intensity of the antenna devices on the electronic equipment is further enhanced, the coverage frequency range of the antenna devices on the electronic equipment is widened, for example, one part of the antenna devices can be used as wifi antennas to optimize the signal transmission performance with a router, and the other part of the antenna devices can be used as Bluetooth antennas to optimize the signal transmission performance with a remote controller. In addition, due to the structural characteristics of each antenna device, the isolation between two adjacent antenna devices is ensured, and mutual interference between the antenna devices is avoided.

Drawings

Fig. 1 is a schematic diagram of a first structure of an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic view of a first construction of the antenna assembly of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a simulated far field pattern of FIG. 2;

Fig. 6 (a) is a plan view of fig. 5 at phi=90°;

fig. 6 (b) is a plan view of fig. 5 at theta=90°;

FIG. 7 is a schematic view of a portion of the structure of FIG. 3;

FIG. 8 is a schematic view of a second construction of the antenna assembly of FIG. 1;

Fig. 9 is a front view of fig. 8;

FIG. 10 is a schematic view of a third construction of the antenna assembly of FIG. 1;

Fig. 11 is a radiation effect diagram of the antenna of fig. 8;

FIG. 12 (a) is a simulated electric field diagram of FIG. 11 with a resonance point of 2.45 GHz;

FIG. 12 (b) is a simulated electric field diagram of FIG. 11 with a resonance point of 3.6 GHz;

FIG. 12 (c) is a simulated electric field diagram with a resonance point of 5GHz in FIG. 11;

FIG. 12 (d) is a simulated electric field diagram of FIG. 11 with a resonance point of 5.5 GHz;

FIG. 13 (a) is a graph showing the current distribution of the antenna assembly of FIG. 1 during radiation;

fig. 13 (b) is a current distribution diagram of a conventional antenna device during radiation;

FIG. 14 is a schematic diagram of the structure of an interference source with horizontal polarization on the back plate of the electronic device of FIG. 1;

FIG. 15 is a graph showing the effect of the antenna assembly of FIG. 14 being disturbed by a horizontally polarized source of interference;

FIG. 16 is a schematic diagram of a structure of an interference source with vertical polarization on a back plate of the electronic device of FIG. 1;

FIG. 17 is a graph showing the effect of the antenna assembly of FIG. 16 being disturbed by a vertically polarized source of interference;

FIG. 18 is a fourth schematic diagram of the antenna assembly of FIG. 1;

Fig. 19 is a front view of fig. 18;

Fig. 20 is a radiation effect diagram of the antenna of fig. 18;

FIG. 21 (a) is a simulated electric field diagram of FIG. 20 with a resonance point of 2.45 GHz;

FIG. 21 (b) is a simulated electric field diagram of FIG. 20 with a resonance point of 3.9 GHz;

FIG. 21 (c) is a simulated electric field diagram of FIG. 20 with a resonance point of 4.9 GHz;

FIG. 21 (d) is a simulated electric field diagram of FIG. 20 with a resonance point of 5.5 GHz;

FIG. 21 (e) is a simulated electric field diagram of FIG. 20 with a resonance point of 6.4 GHz;

FIG. 22 is a schematic view of the antenna assembly of FIG. 1 positioned outside of two bases;

fig. 23 is a graph showing the radiation effect of the antenna in fig. 22 when the antenna device is located at a different position;

FIG. 24 is a schematic view of the antenna assembly of FIG. 1 positioned between two bases;

fig. 25 is a schematic diagram of a second structure of an electronic device according to an embodiment of the present application;

fig. 26 is a graph of the radiation effect of the two antennas of fig. 25;

Fig. 27 is a simulated far field pattern of the first antenna arrangement of fig. 25;

fig. 28 is a simulated far field pattern of the second antenna arrangement of fig. 25;

Fig. 29 is a schematic view of a third structure of an electronic device according to an embodiment of the present application;

fig. 30 is an antenna radiation effect diagram of the three antenna devices of fig. 29.

Reference numerals illustrate:

10-an electronic device;

1-antenna equipment, 100-electronic equipment body, 200-antenna device;

110-backboard, 120-base, 210-metal floor, 220-main radiating arm, 230-feed structure, 240-feed port, 250-auxiliary radiating arm, 260-first interference source, 270-second interference source, 201-first antenna device, 202-second antenna device, 203-third antenna device;

121-first base, 122-second base, 221-annular side wall, 222-top wall, 223-radiant cavity, 224-opening, 225-first gap, 226-second gap, 227-third gap, 231-first portion, 232-second portion, 233-third portion;

2211-a first side wall, 2212-a second side wall, 2213-a third side wall.

Detailed Description

The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application.

Fig. 1 is a schematic diagram of a first structure of an electronic device according to an embodiment of the present application. Referring to fig. 1, generally, an antenna device is provided on an electronic device such as a television, and signals are transmitted or received through the antenna device to realize information transfer with a router, a remote controller, other remote devices, and the like.

Taking a television as an example, with the development of a 5G communication system, a 5G antenna device is applied to a large-screen television, for example, a 5G antenna device with the characteristics of being capable of completing large-data-volume transmission, ultra-large network capacity and the like is arranged on the television to receive or transmit signals, so that information transfer with other devices and the like is realized, and the requirements of people on ultra-high-definition videos, cloud games, VR experience, television remote education and the like are met.

In the conventional art, a large-screen television includes a television body and an antenna device, the antenna device is disposed on a back plate of the television body, and the antenna device is located at a position of the back plate near a bottom corner. Currently, the antenna device is usually an inverted F-shaped antenna (INVERTED F ANTENNA, abbreviated as IFA) or a planar inverted F-shaped antenna (PLANE INVERTED F ANTENNA, abbreviated as PPIFA), and electromagnetic waves are radiated in all directions through the radiator of the IFA/PIFA antenna, so that part of the electromagnetic waves emitted by the antenna device can be radiated to the front of the screen of the television body through the side of the television body, and the purpose of transmitting signals through the position in front of the screen is achieved.

Specifically taking an IFA antenna as an example, the IFA antenna includes a metal floor and a radiator that are disposed opposite to each other along a thickness direction of the television body, where the metal floor is disposed on a back plate of the television body, and generally the back plate of the television body may be directly used as the metal floor of the IFA antenna, and a feeding structure, a grounding short-circuit leg, and a parasitic structure are disposed between the metal floor and the radiator. The feed structure is arranged at one end of the radiator, one end of the feed structure is connected with the radiator, and the other end of the feed structure is electrically connected with the signal emission source in the television body through the feed port on the metal floor, so that the signal emission source feeds signal current into the antenna radiator through the feed port and the feed structure, and the antenna radiator emits the signal current to the receiving end in the form of electromagnetic waves.

The two ends of the grounding short-circuit leg are respectively connected with the radiator and the metal floor, the bottom of the parasitic structure is connected with the metal floor, and a certain gap is reserved between the top of the parasitic structure and the radiator, so that the radiator feeds signal current to the parasitic structure in a gap coupling feeding mode, and the parasitic structure emits the signal current in an electromagnetic wave mode, so that the bandwidth of the IFA antenna is widened.

Based on the above, the conventional antenna device, such as the IFA antenna, is of an open structure, i.e. the radiator and the metal floor are both of an open structure, there is no side shielding portion, and electromagnetic waves excited by the radiator and the parasitic structure are uniformly radiated from a circumference of the IFA antenna, so that the directivity coefficient of the frequency band 2.4Gwifi of the antenna device is higher, and only a portion of the electromagnetic waves radiate from the side of the television to the front of the screen, thereby reducing the forward gain and affecting the performance of the front-screen antenna of the electronic device such as the television. The directivity coefficient of the frequency band of 2.4Gwifi of the traditional antenna device is 7.1dBi, and the forward gain is-2.4 dBi. The forward gain refers to the gain of electromagnetic waves radiated from the antenna to the front of the screen of the large-screen television.

The embodiment of the application provides an antenna device and electronic equipment, wherein a main radiation arm of the antenna device is arranged to comprise a circular side wall and a top wall, and the circular side wall, the top wall and a metal floor are enclosed together to form a radiation cavity with an opening at one side, so that after a feeding structure in the radiation cavity feeds signal current to the main radiation arm, electromagnetic waves in the radiation cavity radiate to the front of a screen of the electronic equipment to a greater extent through the opening on the circular side wall, and electromagnetic waves radiated to other areas are effectively reduced due to the blocking of the circular side wall, thereby improving the forward gain of 2.4Gwifi frequency bands and other frequency bands of the antenna device, and reducing the directivity coefficients of 2.4Gwifi frequency bands and other frequency bands of the antenna device.

The structures of the antenna device and the electronic apparatus according to the embodiments of the present application are described in detail below by three embodiments.

Example 1

Fig. 2 is a schematic view of a first structure of the antenna device of fig. 1, and fig. 3 is a front view of fig. 2. Referring to fig. 2 and 3, an embodiment of the present application provides an antenna device 200, where the antenna device 200 is fixed on a back plate 110 of an electronic device 10. It can be understood that the electronic device 10 includes an electronic device body 100, the back plate 110 of the electronic device 10 and the screen of the electronic device 10 are respectively disposed on two sides of the electronic device body 100 along the thickness direction, and the antenna device 200 is fixed on the back plate 110 of the electronic device body 100.

It should be noted that the electronic device 10 according to the embodiment of the present application may include, but is not limited to, a television, a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, an interphone, a netbook, a POS machine, a Personal Digital Assistant (PDA), a wearable device, a virtual reality device, and other mobile or fixed terminals having the antenna device 200 and a screen.

The television set is specifically described as an example. In practical applications, the television body of the television further includes a plurality of bases 120 disposed at the bottom of the back plate 110 at intervals, and the television is stably fixed on a fixing surface such as a wall surface through the bases 120. The antenna device 200 according to the embodiment of the present application may be fixed on the back plate 110.

Illustratively, the antenna device 200 may be fixed on any side of the back plate 110, so that a path of electromagnetic waves emitted by the antenna device 200 to the front of a screen of the television is shortened, and loss of the antenna device 200 in the radiation path is reduced, thereby improving forward gain of the antenna device 200 and optimizing performance of a front-screen antenna of the television. For example, the antenna device 200 may be fixed on one of the sides of the back plate 110 away from the base 120, or may be fixed on one of the sides of the back plate 110 near the base 120, which is not limited by the location of the antenna device 200 in the embodiment of the present application.

Referring to fig. 2 and 3, an antenna device 200 according to an embodiment of the present application includes a metal floor 210, a main radiating arm 220, and a feeding structure 230. The metal floor 210 is fixed to the back plate 110 of the electronic device 10, the main radiation arm 220 includes an annular sidewall 221 and a top wall 222, the top wall 222 is opposite to the metal floor 210, that is, the top wall 222 is located at a side of the metal floor 210 facing away from the back plate 110, one end of the annular sidewall 221 is connected to the top wall 222, the other end of the annular sidewall 221 is connected to the metal floor 210, that is, the annular sidewall 221 is located between the top wall 222 and the metal floor 210, and two ends of the annular sidewall 221 along a height direction (as shown in a y direction in fig. 2) are respectively connected to the top wall 222 and the metal floor 210, so that the annular sidewall 221, the top wall 222 and the metal floor 210 of the main radiation arm 220 enclose a cavity structure, and the cavity is a radiation cavity 223 of the antenna device 200.

The annular sidewall 221 may be detachably fixed on the metal floor 210 by means of screws or clamping, so as to ensure that the annular sidewall 221 and the metal floor 210 are electrically connected, and simultaneously facilitate the independent replacement of the annular sidewall 221 and the metal floor 210.

Referring to fig. 2, the annular sidewall 221 has an opening 224, for example, one or more strip-shaped slits may be provided on a side surface of the annular sidewall 221 facing the edge of the back plate 110, the strip-shaped slits may be used as the opening 224, or a through hole having a circular or square shape may be provided on a side surface of the annular sidewall 221 facing the edge of the back plate 110, and the through hole may be used as the opening 224.

In this way, the antenna device 200 is formed such that the side portion is opened and the remaining portion is closed. When the antenna device 200 is mounted on the back plate 110 of an electronic apparatus 10, such as a television, the opening 224 is oriented towards the edge of the back plate 110 of the television, for example, when the antenna device 200 is located at a first edge of the back plate 110, the opening 224 of the annular sidewall 221 is oriented towards the first edge, so that electromagnetic waves in the radiation cavity 223 radiate from the edge of the back plate 110 to the front of the screen of the television through the opening 224.

It will be appreciated that the number of the openings 224 may be one or more, and may be specifically adjusted according to actual needs.

When specifically disposed, the annular sidewall 221 of the embodiment of the present application may be an arc sidewall disposed around one axis perpendicular to the metal floor 210, so that the annular sidewall 221 has a cylindrical structure.

Fig. 4 is a top view of fig. 2. Referring to fig. 4, in some examples, the annular side wall 221 may further include a first side wall 2211, a second side wall 2212, and a third side wall 2213 connected in sequence, the first side wall 2211 and the third side wall 2213 are disposed opposite to each other, the second side wall 2212 is located between the first side wall 2211 and the third side wall 2213, a gap between ends of the first side wall 2211 and the third side wall 2213 remote from the second side wall 2212 forms an opening 224, and each of the first side wall 2211, the second side wall 2212, and the third side wall 2213 is configured in a planar structure.

In the embodiment of the application, the annular side wall 221 is formed by sequentially connecting three planar side walls, so that the annular side wall 221, the top wall 222 and the metal floor 210 are enclosed to form a radiation cavity 223 with one open side and the other five closed sides, thereby improving the forward gain of 2.4Gwifi frequency bands, reducing the directivity coefficient of 2.4Gwifi frequency bands of the antenna device 200, simplifying the structure of the main radiation arm 220, and improving the manufacturing efficiency of the antenna device 200.

It is appreciated that the main radiating arm 220 of embodiments of the present application may be a metal piece such as copper, aluminum, etc. to ensure the passage of current.

The feeding structure 230 of the embodiment of the present application is located in a radiation cavity 223 enclosed by the main radiation arm 220 and the metal floor 210, and the feeding structure 230 is used for feeding signal current to the main radiation arm 220.

For example, referring to fig. 3, a feeding port 240 is formed on the metal floor 210, one end of the feeding port 240 is electrically connected to a signal emitting source (not shown) inside the electronic device 10, one end of the feeding structure 230 is connected to the feeding port 240, and the other end of the feeding structure 230 is connected to the main radiating arm 220, for example, the top wall 222, so that the signal emitting source can feed a signal current to the main radiating arm 220 through the feeding port 240 and the feeding structure 230, thereby causing the main radiating arm 220 to generate electromagnetic waves, and the signal current on the main radiating arm 220 also excites the radiating cavity 223 to generate electromagnetic waves.

When the feeding port 240 is specifically disposed, a mounting hole may be formed on the metal floor 210, and one end of the feeding port 240 is electrically connected to the feeding structure 230, and the other end passes through the mounting hole and is electrically connected to a signal emitting source inside the electronic device 10, such as a television. The specific structure of the feeding port 240 may be directly referred to a feeding port of a conventional antenna structure, which is not described herein.

Because the annular sidewall 221, the top wall 222 and the metal floor 210 of the embodiment of the present application are enclosed together to form a radiation cavity 223 with an opening 224 at one side, i.e. one side of the radiation cavity 223 is open, and the rest is closed, when the feeding structure 230 in the radiation cavity 223 feeds signal current to the main radiation arm 220, the main radiation arm 220 and electromagnetic waves in the radiation cavity 223 radiate out to a greater extent through the opening 224 on the annular sidewall 221, and then radiate to the front of the screen of the television through the side of the television, and the electromagnetic waves radiated to other areas are effectively reduced due to the blocking of the annular sidewall 221, thereby improving the forward gain of the 2.4Gwifi frequency band and other frequency bands of the antenna device 200, and reducing the directivity coefficients of the 2.4Gwifi frequency band and other frequency bands of the antenna device 200.

Fig. 5 is a simulated far field pattern of fig. 2. Referring to fig. 5, the maximum direction of the antenna device 200 in the radiation process is on the horizontal plane (such as the x-y plane in fig. 5), and according to the simulation experiment, the directivity coefficient of the antenna device 200 in the embodiment of the present application is 5.9dBi, which is optimized by 1.2dBi compared with the conventional antenna device.

Fig. 6 (a) is a planar pattern of fig. 5at phi=90°, and fig. 6 (b) is a planar pattern of fig. 5at theta=90°. Referring to fig. 6 (a) and 6 (b), the curve at the point a is the plane direction curve of the conventional antenna device, and the curve at the point b is the plane direction curve of the antenna device 200 according to the embodiment of the present application. Referring to FIG. 6 (a), the forward gain at point a is-2.418 dB and the forward gain at point b is 0.9796dB, which illustrates that the antenna apparatus 200 according to the embodiment of the present application optimizes 3.3976dB compared with the conventional technique. Referring to FIG. 6 (b), the forward gain at point a is-2.393 dB and the forward gain at point b is 0.9476dB, which illustrates that the antenna device 200 of the embodiment of the present application is optimized by 3.34dB compared with the conventional technique.

Meanwhile, by setting the antenna device 200 to a cavity structure with the side wall having the opening 224, a plurality of resonance points can be excited in the feeding process, so that the bandwidth of the antenna device 200 is widened, more frequency bands can be covered, and the antenna performance of the antenna device 200 is improved.

In a specific arrangement, the feeding structure 230 of the embodiment of the present application may be a feeder line or a feeding metal member.

Fig. 7 is a schematic view of a part of the structure of fig. 3. Referring to fig. 7, when the feeding structure 230 is a feeding metal member, the feeding structure 230 may have an inverted "U" structure, for example, the feeding structure 230 may include a first portion 231, a second portion 232, and a third portion 233 connected in sequence, the second portion 232 is disposed opposite to the metal floor 210, and one ends of the first portion 231 and the third portion 233 away from the second portion 232 extend toward the metal floor 210.

The metal floor 210 has a feeding port 240 thereon, one of the first portion 231 and the third portion 233 is connected to the feeding port 240, and the other of the first portion 231 and the third portion 233 is connected to the metal floor 210. For example, an end of the first portion 231 remote from the second portion 232 is connected to the feeding port 240 such that an end of the first portion 231 is electrically connected to the signal emitting source through the feeding port 240, thereby feeding the signal current through the feeding port 240 onto the feeding structure 230, which in turn feeds the signal current through the feeding structure 230 onto the main radiating arm 220. The end of the third portion 233 remote from the second portion 232 is connected to the metal floor 210 to ground the feed structure 230. For example, the third portion 233 may be secured to the metal floor 210 by means of a snap fit or screw connection, or the like.

Wherein the second portion 232 has a first gap 225 with the top wall 222 of the main radiating arm 220, such that the signal current on the second portion 232 can feed the signal current onto the top wall 222 of the main radiating arm 220 by breaking through the first gap 225, thereby flowing in the entire main radiating arm 220 and the radiating cavity 223, and realizing the gap coupling feeding between the feeding structure 230 and the main radiating arm 220.

Of course, the second portion 232 may also be directly attached to the top wall 222 of the main radiating arm 220, such that the signal current on the second portion 232 is directly fed to the top wall 222 of the main radiating arm 220, thereby flowing within the entire main radiating arm 220 and the radiating cavity 223.

In the embodiment of the application, by arranging the feed structure 230 to be similar to an inverted U-shaped structure, one end of the feed structure 230 is connected with the feed port 240, and the other end is connected with the metal floor 210, which is favorable for impedance matching of the feed structure 230, reduces the power loss in the feed structure 230, effectively reduces the return loss of the antenna device 200 of the embodiment of the application, and improves the antenna gain.

In other examples, the feeding structure 230 may have an "L" structure, for example, referring to fig. 7, the feeding structure 230 may only include a first portion 231 and a second portion 232 connected in sequence, where the first portion 231 extends toward the metal floor 210, the second portion 232 is located at an end of the first portion 231 near the top wall 222, and the second portion 232 forms an angle with the first portion 231, for example, an angle between the second portion 232 and the first portion 231 is 90 °. The second portion 232 and the top wall 222 have a gap therebetween, and an end of the first portion 231, which is far away from the second portion 232, is connected to the feeding port 240 on the metal floor 210, so as to ensure that the signal current is fed into the feeding structure 230, and meanwhile, the signal current on the second portion 232 is fed to the top wall 222 by gap feeding.

In addition, the feeding structure 230 may also be a direct-fed capacitor structure, and the specific structure and feeding distance thereof may be directly referred to the conventional technology, which is not described herein.

Fig. 8 is a schematic view of a second structure of the antenna device of fig. 1, and fig. 9 is a front view of fig. 8. Referring to fig. 8 and 9, the antenna device 200 of the embodiment of the present application may further include a sub-radiating arm 250, and the sub-radiating arm 250 is disposed in the radiating cavity 223.

Referring to fig. 8 and 9, in a specific arrangement, an end of the auxiliary radiating arm 250 facing the metal floor 210 may extend to the metal floor 210, a second gap 226 is formed between an end of the auxiliary radiating arm 250 facing the top wall 222 and the top wall 222, for example, a bottom of the auxiliary radiating arm 250 is fixed on the metal floor 210, and a second gap 226 is formed between a top of the auxiliary radiating arm 250 and the top wall 222, so that a signal current on the top wall 222 may be fed to the auxiliary radiating arm 250 through the second gap 226, so that a signal current is formed on the auxiliary radiating arm 250, and electromagnetic waves are radiated, so that the antenna device 200 excites more resonance points, the bandwidth of the whole antenna device 200 is widened, the antenna device 200 can cover more frequency bands, and the utilization rate of the antenna device 200 is improved.

In addition, when the end of the auxiliary radiating arm 250 facing the metal floor 210 may extend onto the metal floor 210, a second gap 226 is formed between the end of the auxiliary radiating arm 250 facing the top wall 222 and the top wall 222, and the auxiliary radiating arm 250, the second gap 226 and the top wall 222 form a filtering structure, so that the auxiliary radiating arm 250 is coupled to feed the high-frequency signal current, and filters the low-frequency signal current, so that the electromagnetic wave signal in the high frequency band is excited by the auxiliary radiating arm 250. The smaller the distance between the second gaps 226, the larger the projection area of the auxiliary radiating arm 250 onto the top wall 222, and the higher the frequency band of the signal current fed by the auxiliary radiating arm 250.

It is understood that the filtering principle of the filtering structure may directly refer to the conventional antenna technology, and will not be described herein.

Fig. 10 is a schematic view of a third construction of the antenna apparatus of fig. 1. Referring to fig. 10, in some examples, an end of the auxiliary radiating arm 250 facing the top wall 222 may extend onto the top wall 222, and a third gap 227 is formed between an end of the auxiliary radiating arm 250 facing the metal floor 210 and the metal floor 210, such that a signal current on the metal floor 210 may be fed onto the auxiliary radiating arm 250 through the third gap 227, so that the auxiliary radiating arm 250 forms a signal current, and thus radiates electromagnetic waves, thereby causing the antenna device 200 to excite more resonance points.

Meanwhile, the auxiliary radiating arm 250, the third gap 227 and the metal floor 210 together form a filtering structure, so that the auxiliary radiating arm 250 is coupled to feed in high-frequency signal current, and filters out low-frequency signal current, thereby exciting high-frequency electromagnetic wave signals through the auxiliary radiating arm 250. It will be appreciated that the smaller the distance between the third gaps 227, the larger the projected area of the auxiliary radiating arms 250 onto the metal floor 210, and the higher the frequency band of the signal current to which the auxiliary radiating arms 250 are coupled.

Of course, in other examples, the auxiliary radiating arm 250 may be suspended between the top wall 222 and the metal floor 210, that is, there is a gap between the top of the auxiliary radiating arm 250 and the top wall 222, and there is a gap between the bottom of the auxiliary radiating arm 250 and the metal floor 210, so that not only is the signal current on the main radiating arm 220 guaranteed to be fed into the auxiliary radiating arm 250 in a gap feeding manner, but also the antenna device 200 forms two filtering structures, so that the auxiliary radiating arm 250 effectively filters out the signal current in the low frequency band and feeds the signal current in the high frequency band.

It will be appreciated that the secondary radiating arms 250 may be spaced from the second side wall 2212 of the annular side wall 221. Of course, the auxiliary radiation arm 250 may also be in contact with the second side wall 2212 of the annular side wall 221, which is not limited in the embodiment of the present application.

The auxiliary radiation arm 250 may be a metal block, which may be fastened to the metal floor 210 or the top wall 222 by means of a snap-fit or screw connection, when specifically provided.

In some examples, the side wall of the auxiliary radiating arm 250 has external threads, the top wall 222 or the metal floor 210 is provided with internal threads, and the auxiliary radiating arm 250 is in threaded connection with the top wall 222 or the metal floor 210, that is, when the auxiliary radiating arm 250 is assembled with the top wall 222, the auxiliary radiating arm 250 may be in threaded connection with the top wall 222, and when the auxiliary radiating arm 250 is assembled with the metal floor 210, the auxiliary radiating arm 250 may be in threaded connection with the metal floor 210. For example, the secondary radiating arms 250 may be screws or bolts with threaded holes formed in the metal floor 210 or the top wall 222.

In the embodiment of the application, the external thread is arranged on the auxiliary radiating arm 250, and the internal thread is arranged on the top wall 222 or the metal floor 210 of the antenna device 200, so that when the auxiliary radiating arm 250 is in threaded fit connection with the top wall 222, the auxiliary radiating arm 250 can be rotated to stably adjust the distance between the auxiliary radiating arm 250 and the metal floor 210, namely, the width of the third gap 227 is stably adjusted, so that the electromagnetic wave frequency band excited by the auxiliary radiating arm 250 can be rapidly adjusted.

When the auxiliary radiating arm 250 is in threaded fit connection with the metal floor 210, the auxiliary radiating arm 250 can be rotated to stably adjust the distance between the auxiliary radiating arm 250 and the top wall 222, i.e. to stably adjust the width of the second gap 226, so as to rapidly adjust the electromagnetic wave frequency band excited by the auxiliary radiating arm 250, thereby not only facilitating the adjustment of the height of one end of the auxiliary radiating arm 250, but also simplifying the connection structure between the auxiliary radiating arm 250 and the metal floor 210 or the top wall 222, and thus improving the assembly efficiency of the whole antenna device 200.

The width of the second gap 226 refers to a distance between an end of the auxiliary radiation arm 250 facing the top wall 222 and the top wall 222. Accordingly, the width of the third gap 227 refers to the distance between the end of the sub-radiation arm 250 facing the metal floor 210 and the metal floor 210.

Referring to fig. 8 and 9, in an embodiment of the present application, the feeding structure 230 may be located between the sub-radiating arm 250 and the third side wall 2213 of the annular side wall 221, that is, the feeding structure 230 is disposed near the third side wall 2213, and the sub-radiating arm 250 is located at a side of the feeding structure 230 away from the third side wall 2213.

Of course, the feeding structure 230 may also be located between the sub-radiating arm 250 and the first side wall 2211 of the annular side wall 221 (not shown in the figures), i.e. the feeding structure 230 is arranged close to the first side wall 2211, and the sub-radiating arm 250 is located at a side of the feeding structure 230 remote from the first side wall 2211.

Wherein, when the feeding structure 230 may be located between the auxiliary radiating arm 250 and the third side wall 2213 of the annular side wall 221, the distance between the auxiliary radiating arm 250 and the third side wall 2213 is 1/3-1/2 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, and the distance between the feeding structure 230 and the third side wall 2213 is less than 1/3 of the distance between the first side wall 2211 and the third side wall 2213.

For example, the distance between the auxiliary radiating arm 250 and the third side wall 2213 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the auxiliary radiating arm 250 is located at 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the third side wall 2213 is 1/4, 1/5 or 1/6 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1/4, 1/5 or 1/6 of the distance between the first side wall 2211 and the third side wall 2213. Illustratively, the secondary radiating arm 250 is located 1/2 between the first side wall 2211 and the third side wall 2213, and the feed structure 230 is located 1/4 between the first side wall 2211 and the third side wall 2213.

Accordingly, when the feeding structure 230 is located between the auxiliary radiating arm 250 and the first side wall 2211, the distance between the auxiliary radiating arm 250 and the first side wall 2211 is 1/3-1/2 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the first side wall 2211 is less than 1/3 of the distance between the first side wall 2211 and the third side wall 2213.

For example, the distance between the auxiliary radiating arm 250 and the first side wall 2211 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the first side wall 2211 of the annular side wall 221, that is, the auxiliary radiating arm 250 is located at 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the first side wall 2211, the distance between the feeding structure 230 and the first side wall 2211 is 1/4, 1/5 or 1/6 of the distance between the first side wall 2211 and the first side wall 2211, that is, the feeding structure 230 is located at 1/4, 1/5 or 1/6 of the distance between the first side wall 2211 and the first side wall 2211. Illustratively, the secondary radiating arm 250 is located 1/2 between the first side wall 2211 and the first side wall 2211, and the feed structure 230 is located 1/4 between the first side wall 2211 and the first side wall 2211.

Fig. 11 is a radiation effect diagram of the antenna of fig. 8. Referring to fig. 11, a curve q1 is an S11 parameter curve of the antenna device 200 according to the embodiment of the present application, and as can be seen from fig. 11, the antenna device 200 according to the embodiment of the present application has four resonance points, including a resonance point c, a resonance point d, a resonance point e, and a resonance point f. Wherein, the frequency of the resonance point c is 2.45GHz, the frequency of the resonance point d is 3.6GHz, the frequency of the resonance point e is 5GHz, and the frequency of the resonance point f is 5.5GHz.

Fig. 12 (a) is a simulated electric field diagram of fig. 11 with a resonance point of 2.45GHz, fig. 12 (b) is a simulated electric field diagram of fig. 11 with a resonance point of 3.6GHz, fig. 12 (c) is a simulated electric field diagram of fig. 11 with a resonance point of 5GHz, and fig. 12 (d) is a simulated electric field diagram of fig. 11 with a resonance point of 5.5 GHz. Referring to fig. 12 (a) to 12 (d), the antenna device 200 according to the embodiment of the present application excites four radiation modes during the antenna radiation. In fig. 12 (a) to 12 (d), an arrow R represents a flow direction of current.

Referring to fig. 12 (a), the antenna device 200 excites a TE10 mode of an open end of a cavity in a radiation process, in which a current of an area a, which is the open end of the cavity, flows in the same direction toward the top wall 222, and a current zero point occurs in the area, and the TE10 mode of the open end of the cavity forms a resonance point c, that is, the TE10 mode of the open end of the cavity forms a 2.45GHz band.

Referring to fig. 12 (B), the antenna device 200 excites a TE20 mode of an open side of a cavity during radiation, in which a current flows in a direction of the metal floor 210 in a region B of the open side of the cavity, a current flows in a direction of the ceiling wall 222 in a region C of the open side of the cavity, and a current zero occurs in the regions B and C, and the TE20 mode of the open end of the cavity forms a resonance point d, that is, the TE20 mode of the open end of the cavity forms a 3.6GHz band.

Referring to fig. 12 (c), the antenna device 200 excites a TE20 mode fed to the first side wall 2211 during radiation, in which mode there are two spaced regions, i.e., region E and region F, near the first side wall 2211. In the region E, the current flows in the direction of the top wall 222, in the region F, the current flows in the direction of the metal floor 210, and a current zero occurs in the region E and the region F, and the TE20 mode fed to the first side wall 2211 forms a resonance point E, that is, the TE20 mode fed to the first side wall 2211 forms a 5GHz band.

Referring to fig. 12 (d), the antenna device 200 excites a TE10 mode formed by feeding to the sub-radiating arm 250 during radiation, in which a current flows in the direction of the metal floor 210 in a region G located near the sub-radiating arm 250 and a current zero occurs in the region G, and the TE10 mode formed by feeding to the sub-radiating arm 250 forms a resonance point f, that is, the TE10 mode formed by feeding to the sub-radiating arm 250 forms a 5.5GHz band.

As can be seen from the foregoing, the feeding structure 230 and the auxiliary radiating arm 250 are respectively disposed at the above-mentioned set positions between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, so that the antenna device 200 excites four different radiation modes to generate four resonance points, and covers 2.45GHz, 3.6GHz, 5GHz and 5.5GHz, so that the antenna device of the embodiment of the application can be applied to cover wifi 2.4G and wifi 5G, and also can be applied to NR frequency bands, N41 frequency bands, N78 frequency bands and N79 frequency bands. The frequency ranges of the N41 frequency band, the N78 frequency band and the N79 frequency band can directly query the existing data, and are not described herein.

Fig. 13 (a) is a current distribution diagram of the antenna device of fig. 1 during radiation, and fig. 13 (b) is a current distribution diagram of a conventional antenna apparatus during radiation. Referring to fig. 13 (a), in the antenna device 200 according to the embodiment of the application, the side wall has the cavity structure with the opening 224, that is, the other area except for the opening 224 is a closed structure, so that the distribution of the signal current of the antenna device 200 is concentrated. Referring to fig. 13 (b), the distribution of signal current of the antenna apparatus 1 is dispersed because the side of the conventional antenna apparatus 1 is a completely open structure. In fig. 13 (a) and 13 (b), the ripple p represents the signal current.

As can be seen from the above, the distribution of the signal current of the antenna device 200 according to the embodiment of the present application is more concentrated than that of the conventional antenna apparatus 1, so as to avoid interference to signals of other apparatuses of the television set, such as other antennas. In addition, interference of an external environment such as a horizontally polarized or vertically polarized antenna or the like to the antenna device 200 is reduced.

Fig. 14 is a schematic structural diagram of an interference source with horizontal polarization on a back plate of the electronic device in fig. 1, and fig. 15 is an effect diagram of the antenna device in fig. 14 after being interfered by the interference source with horizontal polarization. Referring to fig. 14, in order to verify the interference degree of an external environment, such as a horizontally polarized antenna, on the antenna device 200 according to the embodiment of the present application, a first interference source 260, which is a horizontally polarized interference source, is provided on the back plate 110 of the electronic device 10, such as a television, and the first interference source 260 radiates electromagnetic waves to the outer periphery.

Referring to fig. 15, a curve r1 is an S11 parameter curve of a conventional antenna device after being interfered by the first interference source 260, and a curve S1 is an S11 parameter curve of the antenna device 200 according to the embodiment of the present application after being interfered by the first interference source 260. It can be seen that, the return loss of the resonance point g with the frequency of 2.4GHz on the curve r1 is-29.19 dB, the return loss of the resonance point i with the frequency of 2.4GHz on the curve s1 is-34.765 dB, the return loss of the resonance point h with the frequency of 5.5GHz on the curve r1 is-31.747 dB, and the return loss of the resonance point j with the frequency of 5.5GHz on the curve s1 is-39.283 dB, so that the influence of polarization on different antenna devices is eliminated, and the return loss of the antenna device 200 of the embodiment of the present application is 7dB smaller than that of the conventional antenna device at the resonance point with the same frequency, namely, when the distance between the first interference source 260 and the antenna device 200 of the embodiment of the present application and the distance between the first interference source 260 and the conventional antenna device are the same, the receiving amount of the interference signal by the antenna device 200 of the embodiment of the present application is 7dB smaller.

Fig. 16 is a schematic structural diagram of an interference source with vertical polarization on a back plate of the electronic device in fig. 1, and fig. 17 is an effect diagram of the antenna device in fig. 16 after being interfered by the interference source with vertical polarization. Referring to fig. 16, in order to verify the interference degree of an external environment such as a vertically polarized antenna or the like on the antenna device 200 according to the embodiment of the present application, a second interference source 270, which is a vertically polarized interference source, is provided on the back plate 110 of the electronic device 10 such as a television set, and the second interference source 270 radiates electromagnetic waves to the outer periphery.

Referring to fig. 17, a curve r2 is an S11 parameter curve of a conventional antenna apparatus after being interfered by the second interference source 270, and a curve S2 is an S11 parameter curve of the antenna apparatus 200 according to the embodiment of the present application after being interfered by the second interference source 270. It can be seen that, the return loss of the resonance point k with the frequency of 2.4GHz on the curve r2 is-30.649 dB, the return loss of the resonance point m with the frequency of 2.4GHz on the curve s2 is-37.181 dB, the return loss of the resonance point l with the frequency of 5.6GHz on the curve r2 is-33.267 dB, and the return loss of the resonance point n with the frequency of 5.6GHz on the curve s2 is-40.435 dB, so that the influence of polarization on different antenna devices is eliminated, and the return loss of the antenna device 200 of the embodiment of the present application is 7dB smaller than that of the conventional antenna device at the resonance point with the same frequency, namely, when the distance between the second interference source 270 and the antenna device 200 of the embodiment of the present application and the distance between the second interference source 270 and the conventional antenna device are equal, the receiving amount of the interference signal by the antenna device 200 of the embodiment of the present application is 7dB smaller.

As can be seen from this, the antenna device 200 according to the embodiment of the application can attenuate the reception of the interference signal in practical application.

Example two

Fig. 18 is a schematic view of a fourth construction of the antenna apparatus of fig. 1, and fig. 19 is a front view of fig. 18. Referring to fig. 18 and 19, unlike the first embodiment, the distance m2 between the feeding structure 230 and the sub-radiating arm 250 is smaller than the distance m1 between the feeding structure 230 and the sub-radiating arm 250 in the first embodiment, that is, the distance between the feeding structure 230 and the sub-radiating arm 250 is smaller than the distance between the feeding structure 230 and the sub-radiating arm 250 in the first embodiment.

The distance between the feeding structure 230 and the sub-radiating arm 250 refers to the distance between the side of the feeding structure 230 facing the sub-radiating arm 250 and the side of the sub-radiating arm 250 facing the feeding structure 230.

For example, when the feeding structure 230 is located between the sub-radiating arm 250 and the third side wall 2213 of the annular side wall 221, the distance between the sub-radiating arm 250 and the third side wall 2213 is 1/3 to 1/2 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, and the distance between the feeding structure 230 and the third side wall 2213 is 1/3 to 1/2 of the distance between the first side wall 2211 and the third side wall 2213;

In particular arrangement, the distance between the secondary radiating arm 250 and the third side wall 2213 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the secondary radiating arm 250 is located at 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the third side wall 2213 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213. Illustratively, the secondary radiating arm 250 is located 1/2 between the first side wall 2211 and the third side wall 2213, and the feed structure 230 is located 1/3 between the first side wall 2211 and the third side wall 2213.

For another example, when the feeding structure 230 is located between the sub-radiating arm 250 and the first side wall 2211 (not shown in the figure), the distance between the sub-radiating arm 250 and the first side wall 2211 is 1/3 to 1/2 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the first side wall 2211 is 1/3 to 1/2 of the distance between the first side wall 2211 and the third side wall 2213.

In particular arrangement, the distance between the auxiliary radiating arm 250 and the first side wall 2211 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, that is, the auxiliary radiating arm 250 is located at 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213, and the distance between the feeding structure 230 and the first side wall 2211 is 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213, that is, the feeding structure 230 is located at 1/2, 2/5 or 1/3 of the distance between the first side wall 2211 and the third side wall 2213. Illustratively, the secondary radiating arm 250 is located 1/2 between the first side wall 2211 and the third side wall 2213, and the feed structure 230 is located 1/3 between the first side wall 2211 and the third side wall 2213.

Fig. 20 is a radiation effect diagram of the antenna of fig. 18. Referring to fig. 20, a curve q5 is an S11 parameter curve of the antenna device 200 according to the embodiment of the application, and as can be seen from fig. 20, the antenna device 200 according to the embodiment of the application has five resonance points, including a resonance point S, a resonance point t, a resonance point u, a resonance point v, and a resonance point w. Wherein, the frequency of the resonance point s is 2.45GHz, the frequency of the resonance point t is 3.9GHz, the frequency of the resonance point u is 4.9GHz, the frequency of the resonance point v is 5.5GHz, and the frequency of the resonance point w is 6.4GHz.

Fig. 21 (a) is a simulated electric field diagram of fig. 20 having a resonance point of 2.45GHz, fig. 21 (b) is a simulated electric field diagram of fig. 20 having a resonance point of 3.9GHz, fig. 21 (c) is a simulated electric field diagram of fig. 20 having a resonance point of 4.9GHz, fig. 21 (d) is a simulated electric field diagram of fig. 20 having a resonance point of 5.5GHz, and fig. 21 (e) is a simulated electric field diagram of fig. 20 having a resonance point of 6.4 GHz. Referring to fig. 21 (a) to 21 (e), the antenna device 200 according to the embodiment of the present application excites five radiation modes during the antenna radiation. In fig. 21 (a) to 21 (e), arrow S represents the flow direction of current.

Referring to fig. 21 (a), the antenna device 200 excites a TE10 mode of an open end of a cavity during radiation, in which currents in a region H of the open end of the cavity flow in the same direction toward the top wall 222, and a current zero occurs in the region, and the TE10 mode of the open end of the cavity forms a resonance point s, that is, the TE10 mode of the open end of the cavity forms a 2.45GHz band.

Referring to fig. 21 (b), the antenna device 200 excites a TE20 mode of the open side of the cavity during radiation, in which a current flows in the direction of the metal floor 210 in a region I of the open side of the cavity, a current flows in the direction of the ceiling 222 in a region J of the open side of the cavity, and a current zero occurs in the regions I and J, and the TE20 mode of the open side of the cavity forms a resonance point t, that is, the TE20 mode of the open side of the cavity forms a 3.9GHz band.

Referring to fig. 21 (c), the antenna device 200 excites a TE20 mode fed to the metal floor 210 during radiation, in which there are two spaced regions above the metal floor 210, i.e., region K and region L. In both the region K and the region L, the current flows in the direction of the metal floor 210, and a current zero occurs in the region K and the region L, and the TE20 mode fed to the metal floor 210 forms a resonance point u, that is, the TE20 mode fed to the metal floor 210 forms a 4.9GHz band.

Referring to fig. 21 (d), the antenna device 200 excites a TE30 mode formed by feeding to the sub-radiating arm 250 during radiation, in which three spaced areas, i.e., an area M, an area N, and an area O, are provided near the sub-radiating arm 250, in which an electric current flows in the direction of the top wall 222, in which an electric current flows in the direction of the metal floor 210, in which an electric current flows in the direction of the top wall 222, and in which an electric current zero occurs in each of the area M, the area N, and the area O, and the TE30 mode formed by feeding to the sub-radiating arm 250 forms a resonance point v, i.e., the TE30 mode formed by feeding to the sub-radiating arm 250 forms a 5.5GHz band.

Referring to fig. 21 (e), the antenna device 200 excites a TE20 mode formed by feeding to the first side wall 2211 during radiation, in which mode there are two spaced regions, i.e., region P and region Q, near the first side wall 2211. The current in the region P and the region Q flows in the direction of the metal floor 210, and a current zero occurs in the region P and the region Q, and the TE20 mode fed to the first side wall 2211 forms a resonance point w, that is, the TE20 mode fed to the first side wall 2211 forms a 6.4GHz band.

As can be seen from the foregoing, the feeding structure 230 and the auxiliary radiating arm 250 are respectively disposed at the above-mentioned set positions between the first side wall 2211 and the third side wall 2213 of the annular side wall 221, so that the antenna device 200 excites five different radiation modes to generate five resonance points, and covers 2.45GHz, 3.9GHz, 4.9GHz, 5.5GHz and 6.4GHz, so that the antenna device 200 can be applied to not only wifi 2.4G and wifi 5G, but also NR frequency bands, N41 frequency bands, N78 frequency bands and N79 frequency bands, but also future sub 8G and wifi 6.

Example III

The embodiment of the application also provides an electronic device 10, which comprises an electronic device body 100 and at least one antenna device 200. The antenna device 200 may be the antenna device 200 in any of the above embodiments.

The antenna device 200 is fixed on the back plate 110 of the electronic device body 100, so that electromagnetic waves in the main radiation arm 220 and the radiation cavity 223 of the antenna device 200 radiate out through the opening 224 to a greater extent, and then radiate to the front of the screen of the electronic device 10 through the side of the electronic device 10.

Illustratively, the antenna device 200 may be fixed on any side of the back plate 110, so that a path of electromagnetic waves emitted by the antenna device 200 to the front of a screen of the television is shortened, and loss of the antenna device 200 in the radiation path is reduced, thereby improving forward gain of the antenna device 200 and optimizing performance of a front-screen antenna of the television.

Fig. 22 is a schematic view of the antenna device of fig. 1 positioned outside two bases. Referring to fig. 1 and 22, in practical application, the television set body of the television set further includes a plurality of bases 120 disposed at the bottom of the back plate 110 at intervals, and the electronic device 10 is stably fixed on a fixing surface such as a wall surface by the bases 120. For example, two bases 120 may be disposed at intervals at the bottom of the back plate 110 of the television, and for convenience of description, the base 120 located at the left side is used as the first base 121, and the base 120 located at the right side is used as the second base 122.

Referring to fig. 1, the antenna device 200 may be fixed to any one of the left, right and upper sides of the back plate 110. As shown in fig. 22, in some examples, the antenna device 200 may also be fixed on the bottom edge of the back plate 110 where the base 120 is provided, and the position of the antenna device 200 is not limited in particular according to the embodiment of the present application.

Referring to fig. 22, the antenna device 200 is exemplarily disposed at the bottom side of the back plate 110, and the antenna device 200 may be disposed at any position between the left side of the back plate 110 and the first chassis 121, that is, the distance m3 between the antenna device 200 and the left side of the back plate 110 may be any value.

The distance between the antenna device 200 and the left side of the back plate 110 refers to the distance between the left side and the side of the antenna device 200 facing the left side.

Fig. 23 is a graph showing the radiation effect of the antenna in fig. 22 when the antenna device is located at a different position. Referring to fig. 23, taking m3 as 12mm, 32mm, and 52mm as an example, the radiation performance of the antenna device 200 is studied, and when the curve q2 in fig. 23 represents the sum of three S11 parameter curves of the antenna device 200 in the case where m3 is 12mm, 32mm, and 52mm, it can be seen that the three S11 parameter curves substantially overlap. In addition, simulation experiments show that when m3 is 12mm, 32mm, and 52mm, the directivity coefficients of the antenna device 200 are 4.93dBi, 4.92dBi, and 4.74dBi, and the forward gains are 1.3dB, 1.4dB, and 1.7dB, respectively.

As can be seen, when the antenna device 200 is disposed at an arbitrary position between the left side of the back plate 110 and the first chassis 121, the antenna S11 parameter, the directivity coefficient, and the forward gain are relatively stable and do not change with the position change.

Fig. 24 is a schematic view of the antenna device of fig. 1 positioned between two bases. Referring to fig. 24, the antenna device 200 may be disposed at an arbitrary position between the first chassis 121 and the second chassis 122, that is, when the antenna device 200 is disposed between the first chassis 121 and the second chassis 122, the distance m4 between the antenna device 200 and the first chassis 121 may be an arbitrary value.

The distance between the antenna device 200 and the first base 121 refers to a distance between a side of the antenna device 200 facing the first base 121 and the first base 121.

Taking m4 as 0mm、5mm、25mm、45mm、65mm、85mm、105mm、125mm、145mm、185mm、225mm、265mm、305mm、345mm、385mm、425mm、465mm、505mm、545mm、585mm and 625mm as an example, the radiation performance of the antenna device 200 was studied. As shown by simulation experiments, when m4 is 0mm、5mm、25mm、45mm、65mm、85mm、105mm、125mm、145mm、185mm、225mm、265mm、305mm、345mm、385mm、425mm、465mm、505mm、545mm、585mm mm and m4 is 625mm, the directivity coefficients of the antenna device 200 are 5.97dBi、4.47dBi、4.96dBi、5.05dBi、5.2dBi、5.02dBi、4.89dBi、4.65dBi、4.45dBi、4.47dBi、4.57dBi、4.54dBi、4.46dBi、4.53dBi、4.52dBi、4.52dBi、4.51dBi、4.49dBi、4.82dBi、4.93dBi dBi and 4.92dBi, and the forward gains are 1dB、1.9dB、1.6dB、1.45dB、1.28dB、1.14dB、1.16dB、1.32dB、1.36dB、1.16dB、1.23dB、1.3dB、1.14dB、1.14dB、1.41dB、1.15dB、1.2dB、1.24dB、1.11dB、1.39dB dB and 1.67dB, respectively.

As can be seen from this, when the antenna device 200 is disposed at an arbitrary position between the first base 121 and the second base 122, the antenna directivity coefficient and the forward gain are relatively stable and do not change with the position change. Therefore, in the antenna design, the antenna device 200 can be arranged at a proper position on the back of the television according to the specific practical situation of the project.

By arranging the antenna device 200 on the back plate 110 of the electronic device body 100, the electromagnetic waves radiated by the antenna device 200 radiate to the front of the screen of the electronic device 10 through the opening 224 of the antenna device 200, and electromagnetic waves radiated to other areas are effectively reduced due to the blocking of the annular side wall 221 of the antenna device 200, so that the forward gain of the frequency band 2.4Gwifi and other frequency bands of the antenna device 200 is improved, and the directivity coefficients of the frequency band 2.4Gwifi and other frequency bands of the antenna device 200 are reduced.

In addition, by setting the antenna device 200 to be a cavity structure with the side wall having the opening 224, a plurality of resonance points can be excited in the feeding process, so that the bandwidth of the antenna device 200 is widened, more frequency bands can be covered, the antenna performance of the antenna device 200 is improved, and the display performance and functional requirements of the electronic device 10 are optimized.

Referring to fig. 1, in practice, the back plate 110 of the electronic device 10 may be a metal back plate, which may be configured as the metal floor 210 of the antenna apparatus 200. For example, when the electronic device 10 is a television, the back plate 110 of the television may be used as the metal floor 210 of the antenna apparatus 200. When the antenna device 200 is assembled on the back of the television, the main radiating arm 220, the feed structure 230 and the auxiliary radiating arm 250 may be directly fixed on the back of the television, so that the structures of the antenna device 200 and the electronic device 10, for example, the television are simplified, the manufacturing cost of the electronic device 10 is reduced, the assembly efficiency of the electronic device 10 is improved, and the weight of the electronic device 10 is reduced.

In addition, in some applications, the exterior of the back plate 110 of the electronic device 10 is further provided with a metal frame, such as a metal plate, and the antenna device 200 is disposed between the back plate 110 and the metal frame. Wherein, the outer part of the back plate 110 refers to the side of the back plate 110 facing away from the screen. For example, the exterior of the back plate 110 of the television may in some applications be provided with a metal frame, such as a metal plate, between which the antenna device 200 is located.

Because of the structural specificity of the antenna device 200 according to the embodiment of the present application, that is, the antenna device 200 according to the embodiment of the present application has a cavity structure with the opening 224 on the side wall, that is, other areas except for the opening 224 are closed structures, electromagnetic waves of the antenna device 200 are mainly radiated to the front of the screen through the opening 224 on the side wall, and the distribution of signal currents of the antenna device 200 is concentrated, so that the antenna performance of the antenna device 200 is not degraded due to the arrangement of the metal frame.

Fig. 25 is a schematic diagram of a second structure of an electronic device according to an embodiment of the present application. Referring to fig. 25, the number of the antenna devices 200 in the embodiment of the application is at least two, and at least two antenna devices 200 are respectively disposed on two adjacent sides of the back plate 110.

First, taking two antenna devices 200 as an example, referring to fig. 25, one antenna device 200 is provided on each of the bottom and left sides of the back plate 110. Wherein, the horizontal distance m5 between the two antenna devices 200 is at least 18mm, and the vertical distance m6 between the two antenna devices 200 is at least 27mm, so as to further improve the isolation between the two antenna devices 200 and ensure that the two antenna devices do not interfere with each other.

It should be noted that, the numerical values and the numerical ranges related to the embodiments of the present application are approximate values, and may have a certain range of errors under the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.

Illustratively, the horizontal distance m5 between the two antenna devices 200 may be a suitable value of 18mm, 20mm, 25mm, or 30mm, and the vertical distance m6 between the two antenna devices 200 may be a suitable value of 27mm, 30mm, 35mm, or 40 mm.

Taking 18mm for m5 and 27mm for m6 as an example, experimental studies on radiation performance were performed on the two antenna devices 200 in the electronic apparatus 10 of fig. 25. Referring to fig. 25, for convenience of description, the antenna device 200 located at the bottom side of the back plate 110 is referred to as a first antenna device 201, and the antenna device 200 located at the left side of the back plate 110 is referred to as a second antenna device 202.

Fig. 26 is an antenna radiation effect diagram of the two antenna devices in fig. 25. Referring to fig. 26, q3 is a generic term for S11 parameter curves of the two antenna devices 200, and it can be seen that the S11 parameter curves of the two antenna devices 200 substantially overlap. In addition, the curve u1 is the isolation between the two antenna devices 200, and it can be seen that the isolation is 27dB or more, and the isolation is good.

Fig. 27 is a simulated far field pattern of the first antenna arrangement of fig. 25, and fig. 28 is a simulated far field pattern of the second antenna arrangement of fig. 25. Referring to fig. 27 and 28, it is known through simulation experiments that the maximum directions of the first antenna device 201 and the second antenna device 202 in the radiation process are on a horizontal plane (such as the x-y plane in fig. 27 and 28), and far field patterns of the two are complementary, which can be used as wifi MIMO layout. In addition, the simulation experiment shows that the directivity coefficient of the first antenna device 201 is 4.7dBi, the directivity coefficient of the second antenna device 202 is 5.4dBi, and the directivity coefficient is better than that of the conventional antenna device.

In the embodiment of the application, at least one antenna device 200 is respectively arranged on two adjacent side edges of the back plate 110, so that the two antenna devices 200 can form wifi MIMO layout, thereby enhancing the radiation intensity of the antenna device 200 on the electronic equipment 10, and widening the coverage frequency band of the antenna device 200 on the electronic equipment 10, thereby improving the signal transmission performance of the electronic equipment 10.

In addition, since each antenna device 200 has a cavity structure with an opening 224 at one side, isolation between the antenna devices 200 is improved, and signal interference between the antenna devices 200 is avoided. Meanwhile, far field patterns of the two antenna devices 200 located on the adjacent two sides are complementary, so that continuity of coverage frequency bands of the formed wifi MIMO antenna is ensured.

The above example is to provide one antenna device 200 on each of the adjacent two sides of the back plate 110.

In some examples, at least two antenna devices 200 may be disposed on at least one of the two adjacent sides of the back plate 110 at intervals. Fig. 29 is a schematic view of a third structure of an electronic device according to an embodiment of the present application. Referring to fig. 29, for example, in addition to fig. 25, one antenna device is further provided at a distance from the first antenna device at the bottom side of the back plate 110. For convenience of description, the antenna device 200 on the first antenna device 201 side is referred to as a third antenna device 203.

Illustratively, the first antenna device 201 and the third antenna device 203 may be disposed at left and right sides of the first chassis 121, respectively.

Fig. 30 is an antenna radiation effect diagram of the three antenna devices of fig. 29. Referring to fig. 30, q4 is a generic term for S11 parameter curves of three antenna devices 200, and it can be seen that the S11 parameter curves of the three antenna devices 200 substantially overlap. The curve u2 is a curve of the isolation between the first antenna device 201 and the second antenna device 202, and it can be seen that the isolation between the first antenna device 201 and the second antenna device 202 is 28dB or more, the isolation is good, the curve u3 is a curve of the isolation between the first antenna device 201 and the third antenna device 203, the curve u4 is a curve of the isolation between the second antenna device 202 and the third antenna device 203, and it can be seen that the isolation between the first antenna device 201 and the third antenna device 203 and the isolation between the second antenna device 202 and the third antenna device 203 are 39dB or more.

In practical applications, the above three-antenna system may be used as a2×wifi+bt system, for example, the first antenna device 201 and the second antenna device 202 with complementary far-field patterns may be used as wifi antennas to optimize signal transmission performance with the router, and the third antenna device 203 may be used as a bluetooth antenna to optimize signal transmission performance with the remote controller.

In addition, due to the structural characteristics of each antenna device 200, the isolation between two adjacent antenna devices 200 is ensured, and it is ensured that mutual interference between each antenna device 200 does not occur.

According to the embodiment of the application, the plurality of antenna devices 200 are arranged at intervals on one side edge of the back plate 110, so that the radiation intensity of the antenna devices 200 on the electronic equipment 10 is further enhanced while the space of the back plate 110 of the electronic equipment 10 is reasonably utilized, and meanwhile, the coverage frequency range of the antenna devices 200 on the electronic equipment 10 is widened, thereby optimizing the performance of the electronic equipment 10.

In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The terms first, second, third, fourth and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Claims (13)

Translated fromChinese

1.一种天线装置，用于固定在电子设备的背板上，其特征在于，所述天线装置包括金属地板、主辐射臂及馈电结构；1. An antenna device for fixing to a back panel of an electronic device, characterized in that the antenna device includes a metal floor, a main radiating arm, and a feeding structure;所述金属地板用于与所述电子设备的背板固定，所述主辐射臂包括环形侧壁和顶壁，所述顶壁与所述金属地板相对设置，所述环形侧壁的一端与所述顶壁连接，所述环形侧壁的另一端与所述金属地板连接，所述环形侧壁上具有开口，所述开口朝向所述电子设备的背板边缘，所述馈电结构位于所述主辐射臂与所述金属地板围合成的辐射腔体内，所述馈电结构用于向所述主辐射臂馈入信号电流；The metal floor is used to be fixed to the back plate of the electronic device. The main radiating arm includes an annular side wall and a top wall. The top wall is arranged opposite to the metal floor. One end of the annular side wall is connected to the top wall, and the other end of the annular side wall is connected to the metal floor. The annular side wall has an opening, and the opening faces the edge of the back plate of the electronic device. The feeding structure is located in a radiating cavity enclosed by the main radiating arm and the metal floor. The feeding structure is used to feed a signal current to the main radiating arm.所述天线装置还包括副辐射臂，所述副辐射臂设置在所述辐射腔体内；The antenna device further includes a secondary radiation arm, and the secondary radiation arm is arranged in the radiation cavity;所述副辐射臂朝向所述金属地板的一端延伸至所述金属地板上，所述副辐射臂朝向所述顶壁的一端与所述顶壁之间具有第二间隙，所述副辐射臂、所述第二间隙及所述顶壁形成滤波结构；One end of the secondary radiation arm facing the metal floor extends onto the metal floor, a second gap is defined between one end of the secondary radiation arm facing the top wall and the top wall, and the secondary radiation arm, the second gap, and the top wall form a filtering structure;或者，所述副辐射臂朝向所述金属地板的一端与所述金属地板之间具有第三间隙，所述副辐射臂朝向所述顶壁的一端延伸至所述顶壁上，所述副辐射臂、所述第三间隙及所述金属地板共同形成滤波结构。Alternatively, a third gap is defined between one end of the secondary radiating arm facing the metal floor and the metal floor, and one end of the secondary radiating arm facing the top wall extends onto the top wall. The secondary radiating arm, the third gap, and the metal floor together form a filtering structure.2.根据权利要求1所述的天线装置，其特征在于，所述馈电结构包括依次连接的第一部分、第二部分和第三部分，所述第二部分与所述金属地板相对设置，所述第一部分和第三部分远离所述第二部分的一端往所述金属地板的方向延伸；2. The antenna device according to claim 1, wherein the feed structure comprises a first portion, a second portion, and a third portion connected in sequence, the second portion is disposed opposite to the metal floor, and ends of the first portion and the third portion away from the second portion extend toward the metal floor;所述金属地板上具有馈电端口，所述第一部分和所述第三部分中的其中一个连接在所述馈电端口上，所述第一部分和所述第三部分中的另一个连接在所述金属地板上。A feeding port is provided on the metal floor, one of the first part and the third part is connected to the feeding port, and the other of the first part and the third part is connected to the metal floor.3.根据权利要求2所述的天线装置，其特征在于，所述第二部分与所述顶壁之间具有第一间隙。3 . The antenna device according to claim 2 , wherein a first gap is formed between the second portion and the top wall.4.根据权利要求1-3任一项所述的天线装置，其特征在于，所述环形侧壁包括依次连接的第一侧壁、第二侧壁及第三侧壁；4. The antenna device according to any one of claims 1 to 3, wherein the annular side wall comprises a first side wall, a second side wall, and a third side wall connected in sequence;所述第一侧壁和所述第三侧壁相对设置，所述第二侧壁位于所述第一侧壁与所述第三侧壁之间，所述第一侧壁与所述第三侧壁远离所述第二侧壁的一端之间的间隙形成所述开口，所述第一侧壁、第二侧壁及第三侧壁均被配置成平面结构。The first side wall and the third side wall are arranged opposite to each other, the second side wall is located between the first side wall and the third side wall, the gap between the first side wall and the end of the third side wall away from the second side wall forms the opening, and the first side wall, the second side wall and the third side wall are all configured into a planar structure.5.根据权利要求4所述的天线装置，其特征在于，所述馈电结构位于所述天线装置的副辐射臂与所述环形侧壁的第三侧壁之间，所述副辐射臂与所述第三侧壁之间的距离是所述环形侧壁的第一侧壁与第三侧壁之间距离的1/3~1/2，所述馈电结构与所述第三侧壁之间的距离小于所述第一侧壁与所述第三侧壁之间距离的1/3；5. The antenna device according to claim 4, wherein the feeding structure is located between the secondary radiating arm of the antenna device and the third sidewall of the annular sidewall, the distance between the secondary radiating arm and the third sidewall is 1/3 to 1/2 of the distance between the first sidewall and the third sidewall of the annular sidewall, and the distance between the feeding structure and the third sidewall is less than 1/3 of the distance between the first sidewall and the third sidewall;或者，所述馈电结构位于所述副辐射臂与所述第一侧壁之间，所述副辐射臂与所述第一侧壁之间的距离是所述第一侧壁与所述第三侧壁之间距离的1/3~1/2，所述馈电结构与所述第一侧壁之间的距离小于所述第一侧壁与所述第三侧壁之间距离的1/3。Alternatively, the feeding structure is located between the secondary radiating arm and the first side wall, the distance between the secondary radiating arm and the first side wall is 1/3 to 1/2 of the distance between the first side wall and the third side wall, and the distance between the feeding structure and the first side wall is less than 1/3 of the distance between the first side wall and the third side wall.6.根据权利要求4所述的天线装置，其特征在于，所述馈电结构位于所述天线装置的副辐射臂与所述环形侧壁的第三侧壁之间，所述副辐射臂与所述第三侧壁之间的距离是所述环形侧壁的第一侧壁与第三侧壁之间距离的1/3~1/2；6. The antenna device according to claim 4, wherein the feeding structure is located between the secondary radiating arm of the antenna device and the third sidewall of the annular sidewall, and the distance between the secondary radiating arm and the third sidewall is 1/3 to 1/2 of the distance between the first sidewall and the third sidewall of the annular sidewall;或者，所述馈电结构位于所述副辐射臂与所述第一侧壁之间，所述副辐射臂与所述第一侧壁之间的距离是所述第一侧壁与所述第三侧壁之间距离的1/3~1/2。Alternatively, the feeding structure is located between the secondary radiating arm and the first side wall, and the distance between the secondary radiating arm and the first side wall is 1/3 to 1/2 of the distance between the first side wall and the third side wall.7.根据权利要求1-3、5-6任一项所述的天线装置，其特征在于，所述天线装置的副辐射臂的侧壁上具有外螺纹，所述顶壁或者所述金属地板上开设有内螺纹，所述副辐射臂与所述顶壁或者金属地板螺纹连接。7. The antenna device according to any one of claims 1-3, 5-6, is characterized in that the side wall of the secondary radiating arm of the antenna device has an external thread, the top wall or the metal floor has an internal thread, and the secondary radiating arm is threadedly connected to the top wall or the metal floor.8.根据权利要求4所述的天线装置，其特征在于，所述天线装置的副辐射臂的侧壁上具有外螺纹，所述顶壁或者所述金属地板上开设有内螺纹，所述副辐射臂与所述顶壁或者金属地板螺纹连接。8. The antenna device according to claim 4 is characterized in that the side wall of the secondary radiating arm of the antenna device has an external thread, the top wall or the metal floor has an internal thread, and the secondary radiating arm is threadedly connected to the top wall or the metal floor.9.一种电子设备，其特征在于，包括电子设备本体和至少一个如权利要求1-8任一项所述的天线装置；9. An electronic device, comprising an electronic device body and at least one antenna device according to any one of claims 1 to 8;所述天线装置固定在所述电子设备本体的背板上，且所述天线装置的开口朝向所述背板的任意侧边。The antenna device is fixed on the back plate of the electronic device body, and the opening of the antenna device faces any side of the back plate.10.根据权利要求9所述的电子设备，其特征在于，所述背板为金属背板，所述金属背板被配置成所述天线装置的金属地板。10 . The electronic device according to claim 9 , wherein the back plate is a metal back plate, and the metal back plate is configured as a metal floor of the antenna device.11.根据权利要求9所述的电子设备，其特征在于，所述天线装置的数量至少为两个，至少两个所述天线装置分别设置在所述背板的相邻两个侧边上。11 . The electronic device according to claim 9 , wherein the number of the antenna devices is at least two, and the at least two antenna devices are respectively arranged on two adjacent sides of the back plate.12.根据权利要求11所述的电子设备，其特征在于，所述至少两个所述天线装置之间的水平距离至少为18mm，所述至少两个所述天线装置之间的垂直距离至少为27mm。12 . The electronic device according to claim 11 , wherein a horizontal distance between the at least two antenna devices is at least 18 mm, and a vertical distance between the at least two antenna devices is at least 27 mm.13.根据权利要求11或12所述的电子设备，其特征在于，所述相邻两个侧边中的至少一个所述侧边上间隔设置有至少两个天线装置。13 . The electronic device according to claim 11 , wherein at least two antenna devices are spaced apart and arranged on at least one of the two adjacent side edges.