CN113922084A - PCB antenna and electronic device using the same - Google Patents

Abstract

The invention discloses a PCB antenna and an electronic device applying the same, wherein the PCB antenna comprises a PCB substrate, a floor, a feeder line and a coupling line, wherein the feeder line and the coupling line are formed by removing a metal conducting layer on the PCB substrate, one end of the coupling line is electrically connected with the floor, the feeder line is used for coupling a received first signal to the coupling line in an electromagnetic coupling mode, and the coupling line is used for generating a second signal under the action of the feeder line and exciting the floor to generate radiation. The received first signal is coupled to the coupling line in an electromagnetic coupling mode through the feeder line, and the coupling line generates a second signal under the action of the feeder line and excites the floor to generate radiation.

Description

PCB antenna and electronic device using same

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a PCB antenna and an electronic device using the same.

Background

TWS: the abbreviation of True Wireless Stereo means True Wireless Stereo. In order to meet the requirement of user portability, the TWS technology is widely applied in the field of bluetooth headsets, so that the TWS headset comes along. Bluetooth antennas are an important component in TWS headsets. In the prior art, the bluetooth antenna is limited by the process conditions, which causes the problem of large occupied space, and for increasingly miniaturized electronic devices, the exterior design of the electronic devices is easily limited, and especially for small-sized TWS headsets, the situation is more serious.

Disclosure of Invention

The invention mainly aims to provide a PCB antenna and an electronic device applying the same, and aims to solve the technical problems that a Bluetooth antenna in the prior art occupies a large space and is difficult to apply to increasingly miniaturized electronic devices.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a PCB antenna comprises a PCB substrate, a floor, a feed line and a coupling line, wherein the feed line and the coupling line are formed by removing a metal conducting layer on the PCB substrate, one end of the coupling line is electrically connected with the floor, the feed line is used for coupling a received first signal to the coupling line in an electromagnetic coupling mode, and the coupling line is used for generating a second signal under the action of the feed line and exciting the floor to generate radiation.

Wherein the PCB antenna further comprises a first impedance element, a first end of the feed line is electrically connected with a circuit on the PCB substrate, a second end of the feed line is electrically connected with the first impedance element, and parameters of the first impedance element are adjustable; alternatively, the second end of the feed line is suspended.

Wherein the line width of the first end portion of the power supply line gradually increases from the first end portion toward the second end portion.

The PCB antenna further comprises a second impedance element, the first end of the coupling line is electrically connected with the floor, the second end of the coupling line is electrically connected with the second impedance element, and the parameter of the second impedance element is adjustable; or the second end of the coupling line is suspended.

Wherein the line widths of at least two portions of the coupled line are different.

Wherein the line length of the feed line is less than a quarter of the wavelength of the radiation and/or the line length of the coupled line is less than a quarter of the wavelength of the radiation.

The feeder line is of a bent structure or a linear structure, and/or the coupling line is of a bent structure or a linear structure.

The feeder line and the coupling line are of a bent structure, the feeder line comprises a feeding main line body, the coupling line comprises a coupling main line body arranged in parallel with the feeding main line body, a first feeding line end and a second feeding line end extend from one side, far away from the coupling main line body, of two ends of the feeding main line body respectively, and a coupling line end extends from one side, facing the feeding main line body, of a free end of the coupling main line body.

The feeder line comprises a first feeder line body and a second feeder line body which are arranged in parallel, the second feeder line body comprises a plurality of sub line bodies which are parallel to each other and have preset intervals, and the coupling line is provided with a line slot which corresponds to each sub line body one to one and is used for embedding the sub line bodies from the free end of the coupling line.

The other technical scheme provided by the invention is as follows:

an electronic device comprises the PCB antenna.

Compared with the prior art, the invention has the following beneficial effects:

the invention couples the received first signal to the coupling line in an electromagnetic coupling mode through the feeder line, and the coupling line generates a second signal under the action of the feeder line and excites the floor to generate radiation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a top view of a PCB antenna of the first embodiment;

fig. 2 is a bottom view of the PCB antenna of the first embodiment;

fig. 3 is another top view of the PCB antenna of the first embodiment;

FIG. 4 is a top view of the PCB antenna of the second embodiment;

fig. 5 is a partially enlarged view of a feeder line and a coupling line in the PCB antenna of the second embodiment;

fig. 6 is a top view of the PCB antenna of the third embodiment;

fig. 7 is a partially enlarged view of a feeder line and a coupling line in the PCB antenna of the fourth embodiment;

FIG. 8 is a top view of the PCB antenna of example five;

fig. 9 is a bottom view of the PCB antenna of the fifth embodiment.

10. A PCB antenna; 1. a PCB substrate; 11. a first surface; 12. a second surface; 2. a feed line; 21. a first end of the feed line; 22. a second end portion of the power feed line; 23. a feed point; 24. a first feeder line; 25. a second feeder line; 26. a third feeder line; 27. a fourth feed line; 28. a fifth feed line; 3. a coupling line; 31. a first end of the coupled line; 32. a second end of the coupled line; 33. a first coupling line; 34. a second coupling line; 35. a third coupling line; 36. a fourth coupling line; 4. a floor; 5. a headroom region.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 3, the present embodiment provides aPCB antenna 10, thePCB antenna 10 includes aPCB substrate 1, aground plate 4, and afeed line 2 and acoupling line 3 formed by removing a metal conductive layer on thePCB substrate 1, one end of thecoupling line 3 is electrically connected to theground plate 4, thefeed line 2 is used for coupling a received first signal to thecoupling line 3 in an electromagnetic coupling manner, and thecoupling line 3 is used for generating a second signal and exciting theground plate 4 to generate radiation under the action of thefeed line 2.

In the embodiment, the first signal received by thefeeder line 2 is coupled to thecoupling line 3 in an electromagnetic coupling manner, and thecoupling line 3 generates the second signal and excites thefloor 4 to generate radiation under the action of thefeeder line 2, so that the embodiment can excite thefloor 4 to generate radiation by thecoupling line 3 only by reserving a smaller use area on thePCB substrate 1 for feeding, thereby reducing the use area of thePCB antenna 10, reducing the space occupation of the PCB antenna, and being capable of being applied to increasingly miniaturized electronic devices.

ThePCB substrate 1 includes a first surface 11 (shown in fig. 1) and a second surface 12 (shown in fig. 2) which are oppositely disposed, in other words, two side surfaces of thePCB substrate 1 where the wiring is provided. Thefeed line 2 and thecoupling line 3 are arranged on thefirst surface 11 of thePCB substrate 1, and thefeed line 2 and thecoupling line 3 are arranged on the same surface of thePCB substrate 1, so that a better electromagnetic coupling effect between thefeed line 2 and thecoupling line 3 can be achieved, thereby improving the performance of thePCB antenna 10.

As shown in fig. 1, thePCB substrate 1 is provided with aclearance area 5 on thefirst surface 11, and thefeeder line 2 and thecoupling line 3 are provided on theclearance area 5. Wherein thefeed line 2 and thecoupling line 3 are not connected to each other.

In the present embodiment, thepower feeding line 2 and the coupledline 3 are horizontally opposed, and thepower feeding line 2 is located above the coupledline 3.

In this embodiment, thefeeding line 2 and thecoupling line 3 are of a bent structure, thefeeding line 2 includes a feeding main line body, thecoupling line 3 includes a coupling main line body arranged in parallel with the feeding main line body, two ends of the feeding main line body extend out of a first feeding line end and a second feeding line end respectively towards a side away from the coupling main line body, and a free end of the coupling main line body extends out of a coupling line end towards a side where the feeding main line body is located.

ThePCB antenna 10 further includes a first impedance element (not shown), thefeeding line 2 is a conductor line (conductive trace) implanted on thefirst surface 11 of thePCB substrate 1, thefirst end portion 21 of thefeeding line 2 is electrically connected to a circuit (not shown) on thePCB substrate 1, and thesecond end portion 22 of thefeeding line 2 is electrically connected to the first impedance element, wherein a parameter of the first impedance element is adjustable. The circuit on thePCB substrate 1 can transmit the first signal on thePCB substrate 1 to thepower feeding line 2 through thefirst end 21 of thepower feeding line 2, so that thepower feeding line 2 generates an electromagnetic field, thereby achieving electromagnetic coupling between thepower feeding line 2 and thecoupling line 3. By adjusting the parameters of the first impedance element, the performance of the signal radiated by thePCB antenna 10 in the required frequency band range is optimized, thereby improving the stability of thePCB antenna 10. It will be appreciated that thesecond end 22 of thefeed line 2 may also be floating.

Specifically, thefirst end 21 of thefeed line 2 is soldered to the circuit of thePCB substrate 1, the solder point being called afeed point 23. The first impedance element is at least one of: inductance, capacitance, and resistance. Thesecond end 22 of thefeed line 2 is electrically connected to an inductor, capacitor, resistor or other combination.

The line width of thefirst end portion 21 of thepower supply line 2 gradually increases from thefirst end portion 21 toward thesecond end portion 22, and thepower supply line 2 and thecoupling line 3 are impedance-matched by thepower supply line 2 having the line width gradually changing at thefirst end portion 21. The impedance matching refers to a working state that the load impedance (the coupling line 3) and the internal impedance of the excitation source (the feeder line 2) are matched with each other to obtain the maximum power output. The impedance matching has the following effects: 1. thefeeder 2 obtains the maximum power output; 2. the high-frequency signal reflection on thefeeder line 2 can be effectively reduced and eliminated; thereby significantly improving the performance of thePCB antenna 10.

In the prior art, when the line length of the antenna is 1/4 of the signal wavelength, the transmission conversion efficiency and the reception conversion efficiency of the antenna are the highest. Therefore, the line length of the antenna will be determined according to the frequency, i.e. wavelength, of the transmitted and received signals. In this embodiment, since the radiation is generated by exciting thefloor 4 through thecoupling line 3, and not by exciting the radiation antenna through thecoupling line 3, the line length of thefeeding line 2 can be much less than a quarter of the wavelength of the radiation, so as to reduce the usable area of thePCB antenna 10, make the occupied space small, and be applied to increasingly miniaturized electronic devices.

Thefeed line 2 is of a bent structure to further reduce the use area of thePCB antenna 10, so that it can be applied to a smaller electronic device. It is understood that thefeeder 2 may also be a straight line structure. Specifically, as shown in fig. 3, thepower supply line 2 includes a firstpower supply line 24 disposed horizontally with respect to the coupledline 3, a secondpower supply line 25 extending vertically from an end of the firstpower supply line 24 toward the coupledline 3, a thirdpower supply line 26 extending horizontally outward from an end of the secondpower supply line 25 with respect to the coupledline 3, and a fourthpower supply line 27 extending vertically from an end of the thirdpower supply line 26 away from the coupledline 3. The thirdpower feed line 26 is the power feed main line body, the secondpower feed line 25 is the first power feed line end, the fourthpower feed line 27 is the second power feed line end, the head end of the firstpower feed line 24 is electrically connected to the circuit on thePCB substrate 1, and the tail end of the fourthpower feed line 27 is electrically connected to the first impedance element. In other words, the head end of thefirst feeder 24 is thefirst end 21 of thefeeder 2, and the tail end of thefourth feeder 27 is thesecond end 22 of thefeeder 2. The line width of the firstpower supply line 24 < the line width of the thirdpower supply line 26 < the line width of the secondpower supply line 25 < the line width of the fourthpower supply line 27.

In the embodiment, thecoupling line 3 is arranged close to thefeeder line 2, which not only enables a better electromagnetic coupling effect to be achieved between thefeeder line 2 and thecoupling line 3, thereby improving the performance of thePCB antenna 10; and the use area of thePCB antenna 10 can be reduced, so that the occupied space is small, and the PCB antenna can be applied to increasingly miniaturized electronic devices.

ThePCB antenna 10 further includes a second impedance element (not shown), as shown in fig. 1, thecoupling line 3 is a conductor line (conductive trace) implanted on thefirst surface 11 of thePCB substrate 1, afirst end 31 of thecoupling line 3 is electrically connected to theground 4, and asecond end 32 of thecoupling line 3 is electrically connected to the second impedance element, wherein a parameter of the second impedance element is adjustable. The second signal generated by the coupledline 3 excites thefloor 4 through thefirst end 31 of the coupledline 3, thereby causing thefloor 4 to radiate. By adjusting the parameters of the second impedance element, the performance of the signal radiated by thePCB antenna 10 in the required frequency band range is optimized, thereby improving the stability of thePCB antenna 10. It will be appreciated that thesecond end 32 of the coupledline 3 may also be suspended.

Specifically, thefirst end 31 of thecoupling wire 3 is welded to thefloor 4, and the second impedance element is at least one of: inductance, capacitance, and resistance. Thesecond end 32 of thecoupling line 3 is electrically connected to an inductor, a capacitor, a resistor or other combinations.

The line widths of at least two parts of thecoupling line 3 are different, and thecoupling line 3 and thefeed line 2 realize impedance matching by thecoupling line 3 with the line widths of the at least two parts being different. The effects are as above and will not be described here.

The line length of thecoupling line 3 is less than a quarter of the wavelength of the radiation, and the effect is as above, and the description is omitted here.

Thecoupling line 3 has a bent structure, and the effect is as above, which is not described herein again. It will be appreciated that the coupledlines 3 may also be straight structures.

Specifically, as shown in fig. 3, the coupledline 3 includes a first coupledline 33 disposed horizontally with respect to thepower feed line 2 and a second coupledline 34 extending vertically from an end of the first coupledline 33 toward thepower feed line 2. Thefirst coupling line 33 is the coupling main line body, thesecond coupling line 34 is the coupling line end, the head end of thefirst coupling line 33 is electrically connected with thefloor 4, and the tail end of thesecond coupling line 34 is electrically connected with the second impedance element. In other words, the head end of the first coupledline 33 is thefirst end portion 31 of the coupledline 3, and the tail end of the second coupledline 34 is thesecond end portion 32 of the coupledline 3. The width of the first coupledline 33 < the width of the second coupledline 34.

In the present embodiment, thefloor 4 is a copper foil layer on thePCB substrate 1, and thefloor 4 is electrically connected to the housing of the electronic device, so that it is grounded. The entire copper foil layer on thePCB substrate 1 is used as thefloor 4, which can increase the intensity of radiation generated from thefloor 4, thereby improving the performance of thePCB antenna 10.

The frequency band of radiation is 2400MHz-2500 MHz. The frequency band is a frequency band range of bluetooth operation, thereby ensuring normal operation of thePCB antenna 10.

Example two:

the difference between the second embodiment and the first embodiment is that the shapes and positional relationships of thepower feeding line 2 and thecoupling line 3 are different.

In this embodiment, thefeeder 2 includes a first feeder body and a second feeder body that are arranged in parallel, the second feeder body includes a plurality of sub-line bodies that are parallel to each other and have a preset interval, and thecoupling line 3 is provided with a slot that corresponds to each sub-line body one-to-one and in which the feeder line bodies are embedded from a free end of thecoupling line 3.

Specifically, as shown in fig. 4 and 5, thepower supply line 2 includes a firstpower supply line 24 disposed horizontally, a secondpower supply line 25 extending vertically downward from the end of the firstpower supply line 24, a thirdpower supply line 26, a fourthpower supply line 27, and a fifthpower supply line 28 extending horizontally outward in this order from the secondpower supply line 25 from above, the fifthpower supply line 28 being disposed on the end of the secondpower supply line 25. The firstpower supply line 24 is the first power supply line body, the thirdpower supply line 26 is the second power supply line body, the fourthpower supply line 27 and the fifthpower supply line 28 are the sub-line bodies, the head end of the firstpower supply line 24 is electrically connected to the circuit on thePCB substrate 1, only one of the tail end of the thirdpower supply line 26, the tail end of the fourthpower supply line 27, and the tail end of the fifthpower supply line 28 needs to be electrically connected to the first impedance element, and the tail end of the thirdpower supply line 26, the tail end of the fourthpower supply line 27, and the tail end of the fifthpower supply line 28 may be electrically connected to different first impedance elements. In other words, the head end of the firstpower feed line 24 is thefirst end portion 21 of thepower feed line 2, the tail end of the thirdpower feed line 26, the tail end of the fourthpower feed line 27, and the tail end of the fifthpower feed line 28 is thesecond end portion 22 of thepower feed line 2. The line width of the secondpower supply line 25 < the line width of the thirdpower supply line 26 ═ the line width of the fourthpower supply line 27 ═ the line width of the fifthpower supply line 28 < the line width of the firstpower supply line 24.

In the present embodiment, the coupledlines 3 include a first coupledline 33, a second coupledline 34, a third coupledline 35, and a fourth coupledline 36, which are horizontally arranged from top to bottom. The head end of thefirst coupling line 33, the head end of thesecond coupling line 34, the head end of thethird coupling line 35, and the head end of thefourth coupling line 36 are electrically connected to thefloor 4, only one of the tail end of thefirst coupling line 33, the tail end of thesecond coupling line 34, the tail end of thethird coupling line 35, and the tail end of thefourth coupling line 36 needs to be electrically connected to the second impedance element, and the tail end of thefirst coupling line 33, the tail end of thesecond coupling line 34, the tail end of thethird coupling line 35, and the tail end of thefourth coupling line 36 may also be electrically connected to different second component elements. In other words, the head end of the first coupledline 33, the head end of the second coupledline 34, the head end of the third coupledline 35, and the head end of the fourth coupledline 36 are thefirst end portion 31 of the coupledline 3, and the tail end of the first coupledline 33, the tail end of the second coupledline 34, the tail end of the third coupledline 35, and the tail end of the fourth coupledline 36 are thesecond end portion 32 of the coupledline 3. The width of the second coupledline 34 is equal to the width of the third coupledline 35 < the width of the first coupledline 33 is equal to the width of the fourth coupledline 36.

Specifically, the third, fourth and fifthpower supply lines 26, 27 and 28 are embedded in the slots formed by the first, second, third andfourth coupling lines 33, 34, 35 and 36, respectively, and the second andthird coupling lines 34 and 35 are embedded in the slots formed by the third, fourth and fifthpower supply lines 26, 27 and 28, respectively.

In the present embodiment, thefeeding line 2 and thecoupling line 3 are embedded into each other, so that a better electromagnetic coupling effect can be achieved between thefeeding line 2 and thecoupling line 3, thereby improving the performance of thePCB antenna 10; and the use area of thePCB antenna 10 can be reduced, so that the occupied space is small, and the PCB antenna can be applied to increasingly miniaturized electronic devices.

Example three:

the difference between the third embodiment and the first embodiment is that the shapes of thefeed line 2 and thecoupling line 3 are different.

As shown in fig. 6, in the present embodiment, thepower feeding line 2 includes a firstpower feeding line 24 disposed vertically with respect to the coupledline 3 and a secondpower feeding line 25 extending horizontally outward from an end of the firstpower feeding line 24 with respect to the coupledline 3. Wherein the head end of thefirst feed line 24 is electrically connected to the circuit on thePCB substrate 1, and the tail end of thesecond feed line 25 is electrically connected to the first impedance element. In other words, the head end of thefirst feeder 24 is thefirst end 21 of thefeeder 2, and the tail end of thesecond feeder 25 is thesecond end 22 of thefeeder 2. The line width of the secondpower feed line 25 < the line width of the firstpower feed line 24.

In the present embodiment, the coupledline 3 includes a first coupledline 33 horizontally disposed with respect to thepower supply line 2 and a second coupledline 34 vertically extending from an end of the first coupledline 33 toward thepower supply line 2. The first end of the first coupledline 33 is electrically connected to thefloor 4, and the second end of the second coupledline 34 is electrically connected to the second impedance element. The width of the first coupledline 33 < the width of the second coupledline 34. The coupledline 3 and thefloor 4 define a boundary surrounding thefeeder line 2, and there is a break between the end of the coupledline 3 and thefloor 4. The portion of thefloor panel 4 constituting the boundary is recessed toward the inside of the body of thefloor panel 4 to form a notch corresponding in position to thefirst end portion 21 of thepower feeding line 2, into which thefirst end portion 21 is fitted.

Example four:

the fourth embodiment is different from the first embodiment in that the shape and positional relationship of thepower feeding line 2 and thecoupling line 3 are different.

As shown in fig. 7, thepower feeding line 2 and the coupledline 3 are horizontally opposed, and thepower feeding line 2 is located below the coupledline 3.

In the present embodiment, thepower feeding line 2 includes a firstpower feeding line 24 disposed vertically with respect to the coupledline 3 and a secondpower feeding line 25 extending horizontally outward from an end of the firstpower feeding line 24 with respect to the coupledline 3. Wherein the head end of thefirst feed line 24 is electrically connected to the circuit on thePCB substrate 1, and the tail end of thesecond feed line 25 is electrically connected to the first impedance element. In other words, the head end of thefirst feeder 24 is thefirst end 21 of thefeeder 2, and the tail end of thesecond feeder 25 is thesecond end 22 of thefeeder 2. The line width of the secondpower feed line 25 < the line width of the firstpower feed line 24.

In the present embodiment, the coupledline 3 has a straight line structure. Thefloor 4 defines a boundary surrounding thefeeder line 2 and thecoupling line 3, and a portion of thefloor 4 constituting the boundary is recessed toward the inside of the body of thefloor 4 to form a notch corresponding in position to thefirst end portion 21 of thefeeder line 2 and into which thefirst end portion 21 is fitted.

Example five:

the difference between the fifth embodiment and the first embodiment is that the positional relationship between thepower feed line 2 and thecoupling line 3 is different.

Thefeeding line 2 and thecoupling line 3 are disposed on different surfaces of thePCB substrate 1, as shown in fig. 8, thefeeding line 2 is disposed on afirst surface 11 of thePCB substrate 1; as shown in fig. 9, the coupledline 3 is disposed on thesecond surface 12 of thePCB substrate 1. Thepower feeding line 2 is obtained by removing part of the copper-clad layer, and the main portion of thepower feeding line 2 is a flat section, for example, one end of the main portion is electrically connected with the circuit of thePCB substrate 1 through a remained copper-clad layer with a larger cross section. Thecoupling line 3 is also obtained by removing part of the copper-clad layer, thecoupling line 3 comprises an upright section which is arranged vertically, a first horizontal section which extends from the tail end of the upright section to the right side, and a second horizontal section which extends from the part between the two ends of the upright section to the left side, and the length of the first horizontal section is far greater than that of the second horizontal section.

Example six:

the present embodiment provides an electronic device which may be provided with a PCB antenna as in any of the preceding embodiments.

In this embodiment, the electronic device is a bluetooth headset. It is understood that the electronic device may be a bracelet, a watch, or other electronic devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

Translated fromChinese

1.一种PCB天线，其特征在于，包括PCB基板、地板以及通过去除所述PCB基板上的金属导电层而形成的馈电线、耦合线，所述耦合线的一端与所述地板电连接，所述馈电线用于将接收的第一信号以电磁耦合的方式耦合到所述耦合线上，所述耦合线用于在所述馈电线的作用下产生第二信号并激励所述地板产生辐射。1. A PCB antenna, characterized in that, comprising a PCB substrate, a floor and a feeder line and a coupling line formed by removing a metal conductive layer on the PCB substrate, one end of the coupling line is electrically connected to the floor, The feed line is used for coupling the received first signal to the coupling line in an electromagnetic coupling manner, and the coupling line is used for generating a second signal under the action of the feed line and exciting the floor to generate radiation .2.根据权利要求1所述的PCB天线，其特征在于，所述PCB天线还包括第一阻抗元件，所述馈电线的第一端部和所述PCB基板上的电路电连接，所述馈电线的第二端部和所述第一阻抗元件电连接，其中，所述第一阻抗元件的参数可调；或者，所述馈电线的第二端部悬空。2 . The PCB antenna according to claim 1 , wherein the PCB antenna further comprises a first impedance element, the first end of the feed line is electrically connected to a circuit on the PCB substrate, and the feed line is electrically connected to a circuit on the PCB substrate. 3 . The second end of the wire is electrically connected to the first impedance element, wherein the parameters of the first impedance element are adjustable; or, the second end of the feeder is suspended.3.根据权利要求2所述的PCB天线，其特征在于，所述馈电线的第一端部的线宽从第一端部往第二端部的方向逐渐变大。3 . The PCB antenna according to claim 2 , wherein the line width of the first end of the feed line gradually increases from the first end to the second end. 4 .4.根据权利要求1所述的PCB天线，其特征在于，所述PCB天线还包括第二阻抗元件，所述耦合线的第一端部和所述地板电连接，所述耦合线的第二端部和所述第二阻抗元件电连接，其中，所述第二阻抗元件的参数可调；或者，所述耦合线的第二端部悬空。4 . The PCB antenna according to claim 1 , wherein the PCB antenna further comprises a second impedance element, the first end of the coupling line is electrically connected to the floor, and the second end of the coupling line is electrically connected. 5 . The end portion is electrically connected to the second impedance element, wherein the parameters of the second impedance element are adjustable; or, the second end portion of the coupling line is suspended.5.根据权利要求4所述的PCB天线，其特征在于，所述耦合线的至少两个部分的线宽不同。5 . The PCB antenna according to claim 4 , wherein the line widths of at least two parts of the coupling line are different. 6 .6.根据权利要求1所述的PCB天线，其特征在于，所述馈电线的线长小于所述辐射的波长的四分之一，和/或，所述耦合线的线长小于所述辐射的波长的四分之一。6. The PCB antenna according to claim 1, wherein the line length of the feed line is less than a quarter of the wavelength of the radiation, and/or the line length of the coupling line is less than the radiation quarter of the wavelength.7.根据权利要求1所述的PCB天线，其特征在于，所述馈电线为弯折结构或者直线结构，和/或，所述耦合线为弯折结构或者直线结构。7 . The PCB antenna according to claim 1 , wherein the feed line is a bent structure or a straight structure, and/or the coupling line is a bent structure or a straight structure. 8 .8.根据权利要求7所述的PCB天线，其特征在于，所述馈电线和耦合线为弯折结构，所述馈电线包括馈电主线体，所述耦合线包括与所述馈电主线体平行布置的耦合主线体，所述馈电主线体的两端分别朝向远离所述耦合主线体所在的一侧延伸出第一馈电线端和第二馈电线端，所述耦合主线体的自由端朝向所述馈电主线体所在的一侧延伸出耦合线端。8 . The PCB antenna according to claim 7 , wherein the feed line and the coupling line are bent structures, the feed line includes a main feed line body, and the coupling line includes a main line body that is connected to the feed line. 9 . The coupling main body is arranged in parallel, two ends of the feeding main body respectively extend a first feeding line end and a second feeding line end toward the side away from the coupling main body, and the free end of the coupling main body is A coupling line end extends toward the side where the main feeding line body is located.9.根据权利要求1所述的PCB天线，其特征在于，所述馈电线包括平行布置的第一馈电线体和第二馈电线体，所述第二馈电线体包括多根相互平行、且具有预设间隔的子线体，所述耦合线设有与各所述子线体一一对应、且供所述子线体从所述耦合线的自由端嵌入的线槽。9 . The PCB antenna according to claim 1 , wherein the feeder comprises a first feeder body and a second feeder body which are arranged in parallel, and the second feeder body comprises a plurality of parallel wires and A sub-wire body with a preset interval, the coupling wire is provided with a wire groove corresponding to each of the sub-wire bodies one-to-one and for the sub-wire bodies to be embedded from the free end of the coupling wire.10.一种电子装置，其特征在于，包括权利要求1-9任一项所述的PCB天线。10. An electronic device, comprising the PCB antenna according to any one of claims 1-9.

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