Disclosure of Invention
The invention aims to provide an antenna and glasses applied to lenses, so as to solve the technical problems of incomplete structure, unreliable physical connection and high antenna design difficulty of the current glasses.
In order to solve the technical problems, the invention provides an antenna applied to a lens, wherein the antenna comprises a radiation branch, a feed branch, a metal component and an antenna ground end;
the antenna ground end is positioned at the edge of the lens, and a floor gap exists between the antenna ground end and the metal component;
The feed branches and the antenna ground end are provided with feed gaps and are fixed in the edge area of the lens;
the radiation branches are connected with the feed branches, coupling gaps exist between the radiation branches and the layer where the metal component is located, and the radiation branches are used for exciting the metal component to generate corresponding resonance points in each preset resonance frequency.
Preferably, the feed branch is perpendicular to a plane in which the inner side wall of the metal component is located.
Preferably, the radiation branches comprise at least a first radiation branch;
The first radiation branch comprises a first sub-radiation branch and a second sub-radiation branch;
The first sub-radiating branch is close to the edge of the metal component and parallel to the metal component, and the first end of the first sub-radiating branch is connected with the feed branch;
The first end of the second sub-radiating branch is connected with the second end of the first sub-radiating branch, and the second end of the second sub-radiating branch is close to the edge of the metal component and perpendicular to the edge of the metal component.
Preferably, the radiation branches further comprise a second radiation branch;
the second radiating branch is vertically connected with the feed branch and is connected with the first end of the first sub-radiating branch.
Preferably, the antenna ground, the feed branch and the feed slot together form a coplanar waveguide for feeding.
Preferably, the ground end of the antenna is a U-shaped ring.
Preferably, the part of the feed branch close to the U-shaped ring adopts a solid metal conductor structure, and the part close to the radiation branch adopts a metal grid structure;
and/or, the radiation branches adopt a metal grid structure;
And/or the U-shaped ring adopts a solid metal conductor structure.
Preferably, the first radiating branch is L-shaped, and the first sub-radiating branch is arc-shaped.
Preferably, the coaxial cable further comprises a coaxial inner conductor and a coaxial outer conductor;
the coaxial line inner conductor is connected with the solid metal conductor part of the feed branch;
the coaxial outer conductor is connected with the U-shaped ring.
Preferably, the first and second radiating branches operate in monopole modes to generate different resonance points when corresponding to the first and second high frequency resonance frequencies, respectively.
Preferably, the metal component is located at the frame where the lens is secured.
In order to solve the technical problems, the invention also provides glasses, which comprise a front glasses frame, lenses, a rear glasses frame and the antenna applied to the lenses;
the antenna is positioned on the inner side of the lens, and the lens and the antenna are positioned between the front lens frame and the rear lens frame.
The invention provides an antenna applied to a lens, which comprises a radiation branch, a feed branch, a metal component and an antenna ground end, wherein the antenna ground end is positioned at the edge of the antenna, a floor gap is formed between the antenna ground end and the metal component, the feed branch and the antenna ground end are provided with feed gaps and are fixed in the edge area of the lens, the radiation branch is connected with the feed branch, a coupling gap is formed between the radiation branch and a layer where the metal component is positioned, and the radiation branch is used for exciting the metal component to generate corresponding resonance points in each preset resonance frequency. According to the invention, the non-physical connection of the antenna and the metal component is realized through the existence of the floor gap between the antenna ground end and the metal component, the existence of the feed gap between the feed branch and the antenna ground end and the existence of the coupling gap between the radiation branch and the layer where the metal component is located, and meanwhile, the metal component is used as a part of the antenna, and the metal component is excited in a coupling mode to form an antenna loop so as to realize the function of the antenna, so that the length of the radiation branch formed by the metal grid is reduced, the conductor loss of metal is also reduced, and the antenna efficiency is improved. Because the radiation branches excite the metal components to generate corresponding resonance points in each preset resonance frequency so as to meet the requirements of a plurality of frequency points, the metal components are not required to be slotted or windowed, the integrity of the glasses is maintained, the structure of the glasses is not required to be changed, and the antenna design difficulty is reduced. The antenna sets up in the edge of lens to and the feed branch knot is in the marginal region of lens, avoids being close to lens center department, does not influence the optics display effect of AR glasses.
In addition, the invention also provides glasses, which have the same beneficial effects as the antenna applied to the lenses.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
The invention provides an antenna and glasses applied to lenses, which are used for solving the technical problems of incomplete structure, unreliable physical connection and high antenna design difficulty of the current glasses.
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
It should be noted that, through slotting or windowing on the metal fuselage, although guaranteeing the radiation characteristic of antenna, but increased complete machine structural design, processing degree of difficulty and cost. The slotting or windowing mode can excite the antenna to form a new mode, and provide a new resonance frequency point so as to reduce the design difficulty of the antenna. In addition, with the rapid development of wireless communication, it is difficult to satisfy the demands of users with only a single communication scheme. The mobile communication device is required to satisfy various communication modes, such as bluetooth, fourth generation network (4 g)/fifth generation network (5 generation,5 g), wireless local area network (WIRELESS FIDELITY, wi-Fi), and the like, and based on this, the antenna is required to be capable of covering a plurality of operating frequency bands. However, the multi-frequency antenna has a complex structure, more wires and more slots or windows, and has higher requirements on the metal body structure. The antenna applied to the lens provided by the invention does not need to slit or window the glasses while providing a plurality of working frequency bands, so as to reduce the design difficulty of the glasses.
Fig. 1 is a schematic structural diagram of an antenna applied to a lens according to an embodiment of the present invention, as shown in fig. 1, the antenna includes a radiation branch 1, a feed branch 2, a metal component, and an antenna ground 3;
the antenna ground end 3 is positioned at the edge of the lens, and a floor gap exists between the antenna ground end and the metal component;
The feed branch 2 and the antenna ground 3 are provided with feed gaps 4 and are fixed at the edge area of the lens;
The radiation branch 1 is connected with the feed branch 2, and has coupling gaps with the layer where the metal component is located, and the radiation branch 1 is used for exciting the metal component to generate corresponding resonance points in each preset resonance frequency.
Specifically, the antenna includes a radiating stub, a feed stub, a metal component, and an antenna ground. The radiation branch is one of branches of an antenna structure for radiating electromagnetic waves, and the feed branch is a radio frequency circuit structure for well feeding radio frequency signals to the radiation branch. The antenna ground is used as a reference ground and is connected to the edge side of the lens of the glasses in order to optimize the efficiency of the antenna and make the signal transmission, the antenna radiation and the receiving effect better.
The antenna is in a different layer than the metal component and is disposed at the edge of the glasses. Fig. 2 is a schematic structural diagram of an eyeglass according to an embodiment of the present invention, as shown in fig. 2, an antenna and a metal component are located at different layers, a ground end of the antenna is located at an edge of a lens, and a floor gap is formed between the antenna and the metal component. The floor slot in this embodiment is based on the slot between the ground plane of the antenna ground and the metal component. The shape of the antenna ground is not limited, and the antenna ground may be designed in consideration of the curvature of the lens or the shape of the feed branch, and may be concave, or may be other shapes.
The feed branch joint and the antenna ground end are provided with feed gaps, and the feed branch joint is fixed in the edge area of the lens. The feed branch is used for adjusting the distance between the antenna and the edge of the metal component so as to adjust the impedance matching of the antenna. The gap between the antenna ground and the feed branch is used as a radiation unit, and the feed is excited by coupling, so that energy is radiated outwards to complete impedance matching. In order not to affect the optical display of the glasses, its feed branches are fixed in the edge region of the lenses.
The radiation branch is connected with the feed branch, a coupling gap exists between the radiation branch and a layer where the metal component is located, fig. 3 is a cross-sectional view of an A-A glasses antenna provided by the embodiment of the invention, as shown in fig. 3, the metal component in fig. 3 is located at a glasses frame to form a metal glasses frame, a longitudinal coupling gap exists between the tail of the radiation branch and the metal glasses frame, the metal glasses frame is excited to radiate through the coupling gap, and the radiation branch is used for exciting the metal glasses frame (the metal component) to generate corresponding resonance points in each preset resonance frequency. It should be noted that, each preset resonant frequency includes a low-frequency resonant frequency and a high-frequency resonant frequency, and the specific frequency value of the corresponding resonant frequency can be set according to the actual situation, and the effect of adjusting the coupling strength of the radiation branch and the metal mirror frame (metal component) is achieved by adjusting the length and the width of the radiation branch so as to achieve impedance matching. The limitation of the length and width of the radiation branches is not required here, and may be set based on actual conditions.
The antenna applied to the lens in this embodiment may be based on a film as a carrier, the radiation branch, the feed branch and the ground end of the antenna are attached to the carrier, the film may be an S-PET film, the film is transparent and colorless, has high heat resistance, and allows low temperature reflow soldering, and each component of the antenna applied to the lens in this embodiment is adhered to the lens by an optically transparent adhesive (Optically CLEAR ADHESIVE, OCA), and the thickness of the film may be 100um.
It should be noted that, the metal component in this embodiment may be a formed metal layer, or may be an embodiment corresponding to the metal lens frame in fig. 2 and 3, specifically, the metal component is located at the lens frame for fixing the lens, so as to form a metal lens frame, or may be a metal paint layer plated on the lens frame to achieve the conductive performance. Accordingly, the frame of the corresponding glasses may be a metal frame or a plastic frame, and is not limited thereto. In the case of a metal frame, the metal component of the present invention is a metal frame. In the case of a plastic rim, the metal component may be a metal layer, or a metal paint or the like may be plated on the plastic rim, and may be set according to the actual situation.
The antenna applied to the lens comprises a radiation branch, a feed branch, a metal component and an antenna ground end, wherein the antenna ground end is located at the edge of the antenna, a floor gap is formed between the antenna ground end and the metal component, the feed branch and the antenna ground end are provided with feed gaps and are fixed in the edge area of the lens, the radiation branch is connected with the feed branch, a coupling gap is formed between the radiation branch and a layer where the metal component is located, and the radiation branch is used for exciting the metal component to generate corresponding resonance points in each preset resonance frequency. According to the invention, the non-physical connection of the antenna and the metal component is realized through the existence of the floor gap between the antenna ground end and the metal component, the existence of the feed gap between the feed branch and the antenna ground end and the existence of the coupling gap between the radiation branch and the layer where the metal component is located, and meanwhile, the metal component is used as a part of the antenna, and the metal component is excited in a coupling mode to form an antenna loop so as to realize the function of the antenna, so that the length of the radiation branch formed by the metal grid is reduced, the conductor loss of metal is also reduced, and the antenna efficiency is improved. Because the radiation branches excite the metal components to generate corresponding resonance points in each preset resonance frequency so as to meet the requirements of a plurality of frequency points, the metal components are not required to be slotted or windowed, the integrity of the glasses is maintained, the structure of the glasses is not required to be changed, and the antenna design difficulty is reduced. The antenna sets up in the edge of lens to and the feed branch knot is in the marginal region of lens, avoids being close to lens center department, does not influence the optics display effect of AR glasses.
In some embodiments, the feed stub is perpendicular to the plane of the inner sidewall of the layer in which the metal component is located.
The feeding branch is shown in fig. 2, and is positioned perpendicular to the edge of the lens, where the lens edge is the intersection of the lens, the metal frame and the legs of the glasses, and is mainly used for adjusting the distance between the antenna applied to the lens and the edge of the metal frame, so as to control the coupling strength between the whole antenna applied to the lens and the metal frame to adjust the impedance matching of the antenna applied to the lens. The degree of coupling in this example is used to characterize the coupling strength.
On the basis of the above embodiment, the radiation branches include at least a first radiation branch;
The first radiation branch comprises a first sub-radiation branch and a second sub-radiation branch;
The first sub-radiating branch is close to the edge of the metal component and parallel to the metal component, and the first end of the first sub-radiating branch is connected with the feed branch;
The first end of the second sub-radiating branch is connected with the second end of the first sub-radiating branch, and the second end of the second sub-radiating branch is close to the edge of the metal component and perpendicular to the edge of the metal component.
As shown in fig. 2, the number of the radiation branches is not limited because the resonant frequencies of the antennas are adjusted, and the embodiment at least includes the first radiation branch. The first radiating branch includes a first sub-radiating branch and a second sub-radiating branch that differ in resonant frequency based on the correspondingly adjusted different shapes. The first sub-radiating branches are close to the edge of the metal mirror frame and parallel to the metal mirror frame and are used for adjusting the low-frequency resonance frequency and the first high-frequency resonance frequency of the antenna.
Fig. 4 is a front view of an antenna applied to a lens according to an embodiment of the present invention, as shown in fig. 4, a first end of a first radiating branch is connected to a feed branch, specifically, is connected to an extension direction of the feed branch, and the first radiating branch is used for adjusting a low-frequency resonant frequency and a first high-frequency resonant frequency of the antenna, and mainly adjusts a length of the first radiating branch to adjust the frequency.
The first end of the second sub-radiating branch 6 is connected with the second end of the first sub-radiating branch 5, and the second end of the second sub-radiating branch 6 is close to the edge of the metal mirror frame and perpendicular to the edge of the metal mirror frame. It can be understood that the second end of the second sub-radiating branch is close to the edge of the metal mirror frame, or can be deep into the mirror frame, or a certain coupling gap exists between the second sub-radiating branch and the metal mirror frame, so that the effect of coupling excitation of the metal mirror frame is achieved, and a low-frequency resonance point is generated. The metal mirror frame is excited by the coupling gap to radiate so as to prolong the electrical length of the antenna applied to the lens in a low-frequency band, thereby realizing the miniaturization design of the eyeglass antenna. The width of the coupling gap influences the coupling strength between the second sub-radiating branches and the metal mirror frame, and the optimal performance of the antenna is realized by optimizing the width of the coupling gap. The width of the corresponding coupling slit is not limited, and may be 1.25mm, or may be of another width.
In some embodiments, the radiation branches further comprise a second radiation branch 7;
The second radiating branch 7 is vertically connected to the feed branch 2 and to the first end of the first sub-radiating branch 5.
Specifically, the second radiation branch is vertically connected with the feed branch, is positioned at the extension of the feed branch, is connected with the first end of the first radiation branch, is opposite to the extension direction of the first radiation branch, is positioned at the upper part of the antenna, and is used for adjusting the second high-frequency resonance frequency of the antenna to generate a high-frequency resonance point. The second high-frequency resonance frequency is adjusted in this embodiment by adjusting the length of the second radiating stub.
On the basis of the embodiment, the radiation branches are designed along the edges of the lenses, have smaller sizes and are far away from the human eyes and the display area of the lenses, are not easy to be perceived by the human eyes, and have smaller influence on the optical characteristics of the lenses.
In some embodiments, the shape of the first radiating stub is defined, the first radiating stub is L-shaped, and the first sub-radiating stub is arc-shaped.
The L-shaped structure comprises a first sub-radiation branch and a second sub-radiation branch, wherein the L-shaped structure of the first sub-radiation branch is of an arc-shaped design, and the edge shape of the lens is mainly considered to be arc-shaped, so that the optical display area of human eyes is not affected due to the fact that the lens is relatively attached to the optical display area.
According to the embodiment of the invention, different types of radiation branches can be used for completing communication modes with various working frequencies through the design of the different types of radiation branches, so that a single communication mode is avoided.
On the basis of the embodiment, the antenna ground terminal, the feed branch and the feed slot jointly form a coplanar waveguide for feeding. A feed gap is formed between the antenna ground end and the feed branch, and the antenna ground end, the feed branch and the feed gap jointly form a coplanar waveguide for feeding. By adjusting the width between the antenna ground and the feed slot and adjusting the length of the antenna ground, the impedance matching of the antenna applied to the lens is adjusted, and even if the antenna ground and the metal component are in non-physical connection with each other, the distance between the antenna ground and the metal component is relatively short, the coupling between the antenna ground and the metal component is relatively strong, the antenna ground and the metal component are connected on the radio frequency in a coupling mode, the size of the antenna ground is expanded, a relatively high degree of freedom is provided for antenna design, and a coupling path is provided for low-frequency loop antenna design in particular, so that the metal component becomes a part of the antenna.
In some embodiments, the antenna ground is a U-shaped loop.
The antenna ground terminal is specifically designed into a U-shaped ring, and the impedance matching of the antenna applied to the lens is adjusted by adjusting the width between the U-shaped ring and the feed gap and adjusting the length of the U-shaped ring. The U-shaped ring provided in the embodiment adjusts the coupling strength by adjusting the shape and the length of the U-shaped ring and the width between the U-shaped ring and the feed branch.
In some embodiments, the part of the feed branch close to the U-shaped ring adopts a solid metal conductor structure, and the part close to the radiation branch adopts a metal grid structure;
And/or the radiation branches adopt a metal grid structure;
And/or the U-shaped ring adopts a solid metal conductor structure.
Specifically, the feed branch is made of mixed metal mesh, specifically, a part close to the U-shaped ring is in a solid metal conductor (pure metal) structure, a part close to the radiation branch is in a metal mesh structure, and the pure metal part is hidden in the mirror frame. The ideal antenna does not consider the feeding point, but in order to extract the signal, the extracted point is taken as the feeding point, i.e. the feeding in this embodiment directly adopts a structure of solid metal conductor as the feeding point.
The structure of the metal grid is adopted, the conductor loss of the metal grid is small, the conductor loss of the pure metal is negligible, the area of the metal grid is reduced as far as possible, the structure of the pure metal is adopted at the place which cannot be seen by human eyes, namely, the U-shaped ring adopts the structure of a solid metal conductor, the part of the feed branch close to the U-shaped ring adopts the structure of the solid metal conductor (pure metal), the transparent metal grid is adopted at the place which can be seen by human eyes, namely, the radiation branch adopts the structure of the metal grid, and the part of the feed branch close to the radiation branch adopts the structure of the metal grid.
In addition, the mesh specification of the metal mesh is not limited, and may be a line width of 10um, a line thickness of 0.5um, a line distance of 100um, a line width of each line, a line thickness of each line, and a line distance of a distance between every two lines. Other parameters may be used, and the parameters are not limited herein and may be set according to actual conditions.
In this embodiment, the metal structures corresponding to the feeding branch, the radiation branch and the U-shaped ring are limited by adopting and/or adopting a mode, so that the diversity of the metal structures of each branch and the U-shaped ring is realized.
In the metal grid structure provided in this embodiment, due to conductor loss of the metal grid, the coupling gap formed between the tail of the second sub-radiating branch and the metal mirror frame excites the metal mirror frame in a coupling mode, so that a low-frequency band loop antenna is formed, meanwhile, the electrical length of the antenna is reduced, the conductor loss of the metal grid is reduced, and the efficiency of the antenna applied to the lens is improved.
In some embodiments, the antenna applied to the optic further comprises a coaxial inner conductor and a coaxial outer conductor;
The coaxial line inner conductor is connected with the solid metal conductor part of the feed branch;
the coaxial outer conductor is connected with the U-shaped ring.
Specifically, as shown in fig. 2, the coaxial inner conductor is located in the feed branch and spans the solid metal conductor part and the metal mesh part, and is connected by low-temperature welding, and the coaxial outer conductor is connected with the U-shaped ring by low-temperature welding. The coaxial line serves to feed the antenna, the corresponding coaxial feed point being at the solid metal conductor portion of the feed stub. It should be understood that, in this embodiment, the corresponding connection mode may be low-temperature welding, or may be other welding modes, which are not limited herein, and may be set according to practical situations.
In some embodiments, the first and second radiating branches operate in monopole modes to produce different resonance points at first and second high frequency resonance frequencies, respectively.
Fig. 5 is a schematic diagram of a simulation S1,1 curve of an antenna applied to a lens to load a first radiation branch and a second radiation branch, as shown in fig. 5, when only the first radiation branch is loaded, the antenna has resonance points at 2.45GHz and 7GHz, which correspond to a low-frequency resonance point 1 and a high-frequency resonance point 2, respectively, and when only the second radiation branch is loaded, the antenna has a resonance point at 5GHz, which corresponds to a high-frequency resonance point 1. When the first radiating branch (radiating branch 1) and the second radiating branch (radiating branch 2) are simultaneously loaded, the antenna has resonance points within all three of the above-mentioned resonance frequencies. The multi-mode antenna can be formed by the antenna applied to the lens and the metal mirror frame, the broadband design of the antenna is realized, the design of windowing or slotting the glasses is avoided, the difficulty and cost of the structural design and processing of the whole glasses are reduced, and the completeness and the attractiveness of the glasses are ensured.
Fig. 6 is a schematic diagram of a simulation S1,1 curve of a metal frame and a plastic frame of glasses to which an antenna applied to a lens belongs, which is provided in an embodiment of the present invention, as shown in fig. 6, when a plastic front frame is adopted, the antenna is a quarter-wavelength monopole, and a resonance frequency point is 3.25GHz. Compared with the metal front frame, the low-frequency resonant frequency of the antenna moves from 2.45GHz to 3.25GHz. Fig. 7 is a schematic diagram of simulated surface current distribution at 2.44GHz of an antenna applied to a lens according to an embodiment of the present invention, as shown in fig. 7, compared with a plastic front frame, a loop antenna with quarter wavelength is formed by a metal front frame and a metal rear frame through a coupling slot by using a first radiation branch, instead of a monopole mode of the plastic front frame. The metal mirror frame is ingeniously used as a part of the antenna, so that the electric length of the first radiation branch is prolonged, and the miniaturized design of the antenna is realized.
Fig. 8 is a schematic diagram of a simulated surface current distribution of an antenna applied to a lens at 5.39GHz, where, as shown in fig. 8, the current is mainly concentrated in a second radiation branch, and the antenna works as a quarter-wavelength monopole, which corresponds to the S1,1 curve shown in fig. 5 when only the second radiation branch is loaded.
Fig. 9 is a schematic diagram of simulated surface current distribution of an antenna applied to a lens at 7.4GHz, where, as shown in fig. 9, the surface current is concentrated in a radiation branch 1, and the surface current works as a monopole with a half wavelength, and corresponds to the S1,1 curve shown in fig. 5 when only the first radiation branch is loaded.
Therefore, the first radiation branch and the second radiation branch work in a monopole mode to generate different resonance points when corresponding to the first high-frequency resonance frequency and the second high-frequency resonance frequency respectively, so as to realize the function of the multimode antenna.
As shown in fig. 1, the present invention further provides an eyeglass comprising a front lens frame, a lens, a rear lens frame, and the antenna applied to the lens in the above embodiment;
the antenna is located the lens inboard, and lens and antenna are located between front mirror frame and the rear mirror frame.
Specifically, the antenna is located inside the lens and is adhered to the lens, the lens can be made of PC material, the lens is an antenna dielectric substrate, the lens and the transparent antenna are located between the front lens frame and the rear lens frame, and the lens and the transparent antenna are fixedly clamped in the lens frame through the front lens frame and the rear lens frame.
For the description of the glasses provided by the present invention, please refer to the above method embodiment, the present invention is not repeated herein, and the method has the same beneficial effects as the antenna applied to the lens.
Fig. 10 is a schematic diagram of a graph showing a frequency change of an antenna actually measured S1,1 applied to a lens according to an embodiment of the present invention, and as shown in fig. 10, an operating frequency band of the antenna |s1,1 |is less than or equal to-10 dB is 1.75GHz-2.56GHz, and 4.57GHz-7.2GHz. Fig. 8 also shows the test results for a pure metal antenna of the same structure and size. Compared with a pure metal antenna, the transparent antenna has basically consistent performance. In addition, compared with the traditional LOOP (LOOP), dipole, monopole and other terminal antennas, the antenna has the advantages of simple structure and wider bandwidth. The Wi-Fi 6E/7 protocol requires the working frequency bands of 2.4GHz (802.11 b/g, frequency band range of 2.400GHz to 2.4835 GHz), 5GHz (802.11 a, frequency band range of 5.150GHz to 5.825 GHz) and 6E (802.11 ax, frequency band range of 5.925GHz to 7.125 GHz), and the working frequency band of the antenna designed by the invention can cover mobile communication frequency bands such as wifi6E/7, namely 2.4GHz frequency band (2.4-2.485 GHz), 5GHz frequency band (5.15-5.85 GHz) and 6GHz frequency band (5.925-7.125 GHz), thereby meeting the requirements of wifi7 on the working frequency band of the antenna.
Fig. 11 is a schematic diagram of a graph showing the actual measurement efficiency of an antenna applied to a lens according to the frequency change, as shown in fig. 11, in a mobile terminal product with multiple frequency Wi-Fi, the antenna efficiency is generally required to be greater than-5 dB. The antenna efficiency of the embodiment of the invention is-1.70 dB to-1.97 dB in the frequency band of 2.38GHz-2.5GHz, and is-1.33 dB to-3.12 dB in the frequency band of 5.05GHz-7.25GHz, which is far higher than the communication index requirement. In addition, under the test result of the pure metal antenna under the same structure and size, compared with the pure metal antenna, the efficiency loss of the transparent antenna is only within 0.65dB, and the antenna has higher efficiency compared with the traditional transparent antenna.
The transparent antenna does not occupy the internal space of the glasses, does not need to slit or window the glasses shell, does not need to be physically connected with the metal shell in any form, has simple structure and easy realization, ensures the integrity and the beauty of the appearance of the AR glasses, and can reduce the volume of the AR glasses. The antenna applied to the lenses allows the glasses to adopt the metal frame without changing the metal shell structure, reduces the difficulty and cost of the whole structure design and processing, and ensures the integrity and the aesthetic property of the metal body.
The transparent antenna is designed along the outer side edge of the mirror frame and is far away from the center of human eyes, so that the transparent antenna is extremely difficult to be perceived by human eyes. Meanwhile, the optical display area of the AR glasses corresponds to the center position of the human eyes, so that the antenna is far away from the optical display area, and the original optical characteristics of the optical waveguide of the AR glasses are kept as far as possible.
The antenna applied to the lens has compact structure, and only utilizes the peripheral space of the lens to design the antenna. The human eyes are used as a visual organ, and the observation range is 60 degrees in the horizontal direction and 40 degrees in the vertical direction. Also, as the angle expands, the vision of the human eye is rapidly reduced, for example, the angle reaches 60 degrees in the horizontal direction, and the vision of the human eye is reduced to less than one tenth of 0 degrees. That is, although the human eye can see objects in the wide angle range, the sharpness is greatly impaired. As shown in fig. 4, when a person wears glasses, the center of the person's eye is generally not coincident with the center of the lens, and the center of the person's eye is located farther inward than the center of the lens. The transparent antenna is designed along the outer side edge of the mirror frame and is far away from the center of human eyes, so that the transparent antenna is extremely difficult to be perceived by human eyes. Meanwhile, the optical display area of the AR glasses corresponds to the center position of the human eyes, so that the antenna is far away from the optical display area, and the original optical characteristics of the optical waveguide of the AR glasses are kept as far as possible.
Fig. 12 is a schematic structural diagram of another antenna applied to a lens according to an embodiment of the present invention, and as shown in fig. 12, a metal component corresponding to the antenna is a metal lens frame, and the metal lens frame is located on a front lens frame (metal front lens frame) of a pair of glasses. The antenna comprises a radiation branch 1, a feed branch 2, a metal component 11 and an antenna ground end 3, wherein the antenna ground end 3 is positioned at the edge of a lens, a floor gap 8 is formed between the antenna ground end 3 and the metal component 11, the feed branch 2 and the antenna ground end 3 are provided with feed gaps 4 and are fixed at the edge area of the lens, and the radiation branch 1 is connected with the feed branch 2 and is provided with a coupling gap with a layer where the metal component 11 is positioned.
The radiation branch 1 at least comprises a first radiation branch, the first radiation branch comprises a first sub-radiation branch 5 and a second sub-radiation branch 6, the first sub-radiation branch 5 is close to the edge of the metal component and parallel to the metal component, the first end of the first sub-radiation branch 5 is connected with the feed branch 2, the first end of the second sub-radiation branch 6 is connected with the second end of the first sub-radiation branch 5, and the second end of the second sub-radiation branch 6 is close to the edge of the metal component and perpendicular to the edge of the metal component.
The radiating branches further comprise a second radiating branch 7, and the second radiating branch 7 is vertically connected with the feeding branch 2 and is connected with the first end of the first sub-radiating branch 5.
The antenna further comprises a coaxial line 9, which coaxial line 9 comprises in particular a coaxial line inner conductor which is connected with the solid metal conductor part of the feed branch 2 and a coaxial line outer conductor which is connected with the U-shaped ring. The part of the inner conductor of the coaxial line connected to the feed branch 2 is a coaxial feed point 10.
The other embodiment of the antenna applied to the lens according to the present embodiment has the same antenna effect as that of the antenna applied to the lens in the above embodiment, and will not be described herein.
The above describes in detail an antenna and spectacles for use with the lenses provided by the present invention. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it will be apparent to those skilled in the art that the present invention may be modified and practiced without departing from the spirit of the present invention.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.