Door handle PCB antenna

Abstract

The application discloses a door handle PCB antenna, which comprises a PCB medium substrate, two antenna modules and a signal processing module, the two antenna modules preferably adopt single-stage T-shaped antennas, and the signal processing module preferably adopts an inverter. The application can realize omnidirectional radiation of electromagnetic beams by arranging a pair of mirror-symmetrical T-shaped antennas, and forms a circular omnidirectional radiation field shape in a horizontal plane where the PCB medium substrate is located. Moreover, the signal processing module makes the mirror-symmetrical T-shaped antennas form two parts of current: one part of current is parallel to the length direction of the PCB medium substrate, and the two parts of current cancel each other to not produce radiation; the other part of current is parallel to the width direction of the PCB medium substrate, and realizes superposition in the same direction on the two antenna modules, so that the two antenna modules form the current of a dipole antenna. Since the antenna current superposed in the width direction is not affected by the induced current of the wire bundle, the electromagnetic beam deviation phenomenon will not occur.

Description

Technical Field

[0001] This invention relates to the field of vehicle antenna technology, and more particularly to a door handle PCB antenna. Background Technology

[0002] The development of new energy light commercial vehicles is attracting increasing attention from domestic manufacturers. Currently, the vehicle control systems of new energy commercial vehicles are gradually becoming more intelligent, incorporating many modern technologies. Therefore, products such as PCB antennas and digital keys are typically integrated into the vehicle's handlebars to achieve control, communication, and interactive functions.

[0003] However, due to the limited space inside the handle, the actual size of the PCB installed inside the door handle is very small, resulting in the following technical problems:

[0004] 1. For example Figure 1 As shown, due to the narrow shape of the PCB board, the PCB antenna generates a narrow beam, and the field pattern naturally exhibits a narrow phenomenon.

[0005] 2. For example Figure 1 As shown, the door handle has a wiring harness, which causes the electromagnetic beam to deflect towards the wiring harness. Therefore, when a person approaches the door handle, the control will fail because the electromagnetic beam is deflected to one side.

[0006] Therefore, it is necessary to invent a PCB antenna suitable for use in vehicle door handles in the existing technology. Summary of the Invention

[0007] In order to overcome the technical problems such as narrow electromagnetic beam and beam offset that exist when the PCB antenna of the prior art is applied to vehicle door handles, the present invention provides a door handle PCB antenna that can generate a circular omnidirectional radiation field in the horizontal direction and form an induced current that is not affected by the wire harness, thus avoiding electromagnetic beam offset.

[0008] The technical solution adopted by this invention to solve its problem is:

[0009] A door handle PCB antenna includes a PCB substrate and an antenna module and a signal processing module disposed on the PCB substrate. The PCB substrate is a long strip-shaped plate structure with varying lengths and widths, and cables are connected to the PCB substrate. The number of antenna modules is at least two, and they are arranged sequentially along the width direction of the PCB substrate. The signal processing module is disposed between the two antenna modules and coupled to each of the two antenna modules. The signal processing module is used to enable the two antenna modules to generate equivalent currents in the same direction along the width direction of the PCB substrate.

[0010] In the above technical solution, two antenna modules distributed along the width direction on both sides of the PCB substrate form a dipole antenna. When current flows through the two antenna modules, the electromagnetic fields generated by the two antenna modules superimpose and interfere with each other in space, resulting in the same radiation intensity of electromagnetic waves in all directions on the horizontal plane where the PCB substrate is located, thus forming an omnidirectional radiation field with small non-circularity. A signal processing module located between and coupled to the two antenna modules is used to generate equivalent currents in the same direction for the two antenna modules. These equivalent currents are parallel to the width direction of the PCB substrate, thus achieving superposition in the width direction. The superimposed antenna currents are not affected by the induced current of the wire harness connected to the PCB substrate, thereby preventing electromagnetic beam deflection.

[0011] As a preferred embodiment, the number of antenna modules is two, and the two antenna modules are symmetrically arranged on both sides of the center line along the length direction of the PCB substrate.

[0012] In the above technical solution, the two antenna modules are mirror-symmetric on the PCB substrate, and the current distribution in the two antenna modules is also mirror-symmetric. This makes the electromagnetic field generated in space symmetrical as well. This symmetry further makes the radiation characteristics of the two antenna modules tend to be consistent in all directions, forming an omnidirectional radiation field with small non-circularity.

[0013] As a preferred embodiment, both antenna modules include a vertical section, one end of which is coupled to the signal processing module, and the vertical section is parallel to the width direction of the PCB substrate; wherein, the signal processing module is used to enable the two vertical sections to form an equivalent current in the same direction along the width direction of the PCB substrate.

[0014] In addition, the two antenna modules also include a horizontal section, the middle of which is connected to the vertical section, and the horizontal section is parallel to the length direction of the PCB substrate.

[0015] In the above technical solution, the two second currents formed by the horizontal parts of the two antenna modules are along the length direction and in opposite directions, and eventually cancel each other out, so no radiation is generated; the two first currents formed by the vertical parts of the two antenna modules are along the width direction and in the same direction, and eventually superimpose to form the current of the dipole antenna composed of the two antennas. The induced current in this direction is not affected by the induced current of the wire harness connected to the PCB dielectric substrate, so no electromagnetic beam deflection phenomenon will occur.

[0016] As a preferred embodiment, the horizontal portion includes a first horizontal portion and a second horizontal portion, which are symmetrically arranged on both sides of the vertical portion.

[0017] In the above technical solution, the first horizontal part and the second horizontal part are mirror symmetrical structures, and the current distribution in the two horizontal parts is also mirror symmetrical. This makes the induced currents formed by the two parts equal in magnitude and opposite in direction, ultimately canceling each other out and not generating electromagnetic radiation.

[0018] As a preferred embodiment, both antenna modules are single-stage T-shaped antennas.

[0019] In the above technical solution, the current signal generated by the signal processing module flows into the vertical part of the single-stage T-shaped antenna and flows along the two horizontal arms of the antenna to the two ends, ultimately causing the two single-stage T-shaped antennas to combine and radiate to produce an omnidirectional radiation field shape that tends to be circular.

[0020] As a preferred embodiment, the signal processing module includes a coupling gap and a signal transmission line. The coupling gap is parallel to the length direction of the PCB substrate, and the signal transmission line is connected to the vertical portion and coupled to the coupling gap.

[0021] In the above technical solution, the coupling gap is used to form two reverse currents along the length direction and in opposite directions. Through electromagnetic coupling with the signal transmission line, the two antenna modules are respectively input with opposite current signals. Since the two antenna modules are set up inverted relative to each other (that is, the structure and layout are mirror symmetrical), the currents formed in the vertical parts of the two antenna modules are in the same direction, forming a superposition effect.

[0022] As a preferred embodiment, the signal processing module further includes a first conductor, a second conductor, and a feed signal line. The first conductor and the second conductor are parallel to the length direction of the PCB substrate. The coupling gap is located between the first conductor and the second conductor. The feed signal line is led out from the first conductor and connected to the second conductor to achieve grounding. The first conductor, the second conductor, and the feed signal line are used to make the coupling gap form two reverse currents with opposite directions along the length direction of the PCB substrate.

[0023] In the above technical solution, both the first conductor and the second conductor are metal strips, with the second conductor serving as a metal ground. The power supply signal line is connected between the first conductor and the second conductor. When current is transmitted through the power supply signal line, a specific electromagnetic field distribution is formed in the coupling gap between the first conductor and the second conductor, making the coupling gap serve as an interface for electromagnetic coupling and a key link for realizing subsequent electromagnetic coupling and signal transmission. The principle of electromagnetic coupling is used to achieve efficient energy transfer.

[0024] As a preferred embodiment, the first conductor and the second conductor are disposed on one side of the PCB dielectric substrate in the thickness direction, and the antenna module is disposed on the other side of the PCB dielectric substrate.

[0025] In the above technical solution, the first conductor and the second conductor are disposed on the front side of the PCB dielectric substrate, and the two antenna modules are disposed on the back side of the PCB dielectric substrate. The first conductor, the second conductor and the two antenna modules are not directly connected, but are coupled and connected through the coupling gap of the signal processing module, so that the two antenna modules generate an equivalent current along the width direction of the PCB dielectric substrate.

[0026] As a preferred embodiment, the signal transmission line is a coupled microstrip line, and at least a portion of the structure of the coupled microstrip line is respectively disposed on both sides of the coupling gap.

[0027] In the above technical solution, the coupled microstrip line serves as the carrier for signal transmission between the signal processing module and the two antenna modules. It receives the energy generated by the coupling gap through electromagnetic coupling and transmits it to the two antenna modules, thereby achieving effective energy transfer and ensuring signal interaction between different parts of the entire antenna system.

[0028] As a preferred embodiment, the first conductor and the second conductor are metal strips, and the second conductor serves as a metal ground so that the feed signal line is led out from the first conductor and connected to the second conductor to achieve grounding.

[0029] In the above technical solution, when current flows through the gap, a changing electromagnetic field is generated around the gap. These electromagnetic fields interact with the coupled microstrip line, and through electromagnetic induction and field coupling effect, energy is transferred from the gap to the coupled microstrip line, realizing efficient energy transfer.

[0030] As a preferred embodiment, the signal processing module is an inverter used to generate two inverted current signals, which transfer energy to the two antenna modules through electromagnetic coupling.

[0031] In summary, the door handle PCB antenna provided by this invention constitutes an antenna system through two mirror-symmetrical T-shaped antennas and a signal processing module, and its specific implementation principle is as follows:

[0032] The signal processing module generates an antiphase current, which transfers energy to the two T-shaped antennas through electromagnetic coupling, so that the current distribution of the mirror-symmetrical T-shaped antennas forms the radiation characteristics of a dipole antenna.

[0033] Compared with existing door handle PCB antennas, this invention has at least the following technical advantages:

[0034] 1) By setting up a pair of mirror-symmetrical T-shaped antennas (inverted relative to each other), omnidirectional radiation of electromagnetic beams can be achieved, forming a circular omnidirectional radiation field on the horizontal plane where the PCB substrate is located.

[0035] 2) The signal processing module enables the mirror-symmetric T-shaped antenna to generate two current components: one current is parallel to the length of the PCB substrate, canceling each other out and thus producing no radiation; the other current is parallel to the width of the PCB substrate, superimposed on the two T-shaped antennas in the same direction, thereby forming a dipole antenna current. At this point, the antenna current superimposed in the width direction is unaffected by the induced current in the wiring harness, thus preventing electromagnetic beam deflection. Attached Figure Description

[0036] Figure 1 This is a schematic diagram illustrating the influence of wire harness on the electromagnetic beam of a PCB antenna for a door handle in the prior art.

[0037] Figure 2 This is a schematic diagram showing that the electromagnetic beam of the door handle PCB antenna of the present invention is not affected by the wiring harness;

[0038] Figure 3 This is a schematic diagram of the PCB antenna structure for the door handle of the present invention;

[0039] Figure 4 This is a front view of the door handle PCB antenna of the present invention;

[0040] Figure 5 This is a reverse view of the PCB antenna for the door handle of the present invention;

[0041] Figure 6 This is an antenna field diagram radiated by the PCB antenna of the door handle of the present invention;

[0042] The meanings of the reference numerals in the attached figures are as follows:

[0043] 1. PCB substrate; 2. Antenna module; 3. Signal processing module; 31. Coupling gap; 32. Signal transmission line; 33. First conductor; 34. Second conductor; 35. Feed signal line; 4. Vertical part; 5. Horizontal part. Detailed Implementation

[0044] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0045] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0047] See Figure 1 As shown, the existing door handle PCB antenna for vehicle door handles is limited by the narrow shape of the PCB board. The PCB antenna generates a narrow beam and is affected by the current of the wiring harness connected to the PCB, causing the electromagnetic beam to deflect towards the wiring harness direction, resulting in control failure.

[0048] Based on this, see Figure 2 As shown, this invention provides a door handle PCB antenna suitable for use in vehicle door handles. The door handle PCB antenna comprises an antenna system consisting of two mirror-symmetrical antenna modules 2 and a signal processing module 3. The signal processing module 3 causes the mirror-symmetrical antenna modules 2 to generate a current parallel to the width direction of the PCB substrate 1. This current is superimposed on the two antenna modules 2 along the same direction, thus forming a dipole antenna current. In this case, the antenna current superimposed in the width direction is not affected by the induced current in the wiring harness, thereby preventing electromagnetic beam shift.

[0049] In addition, a reverse current is generated by the signal processing module 3. The reverse current transfers energy to the two T-shaped antennas (i.e., antenna module 2) through electromagnetic coupling, so that the current distribution of the mirror-symmetric T-shaped antennas forms the radiation characteristics of a dipole antenna, and finally forms a nearly circular omnidirectional radiation field shape in the horizontal plane.

[0050] Example 1

[0051] In the first embodiment of the present invention, a specific structural design scheme for two antenna modules 2 of a door handle PCB antenna is provided.

[0052] See Figure 3As shown, in this embodiment, the door handle PCB antenna includes a PCB substrate 1 and two antenna modules 2 and a signal processing module 3 disposed on the PCB substrate 1. The PCB substrate 1 is a long strip-shaped plate structure with unequal length and width, the length being greater than the width, suitable for use with vehicle door handles. See also... Figure 3 As shown, the length direction is... Figure 3 The X-axis direction shown is the width direction. Figure 3 The Y-axis direction is shown.

[0053] See Figure 3 As shown, there are at least two antenna modules 2, and the antenna modules 2 are arranged sequentially along the width direction (i.e., along the Y-axis) of the PCB substrate 1. The two antenna modules 2 are used to form a dipole antenna. When current flows through the two antenna modules 2, the electromagnetic fields generated by the two antenna modules 2 superimpose and interfere with each other in space, resulting in the same radiation intensity of the electromagnetic wave in all directions of the horizontal plane where the PCB substrate 1 is located, thus forming an omnidirectional radiation field with relatively small non-circularity.

[0054] See Figure 3 and Figure 4 As shown, the signal processing module 3 is disposed between the two antenna modules 2 and coupled to both antenna modules 2 respectively, and is used to generate equivalent currents (i.e., currents) that are in the same direction along the width direction of the PCB substrate 1 between the two antenna modules 2. Figure 4 The current in direction a is shown, and the equivalent current is parallel to the width direction of the PCB substrate 1. The antenna current superimposed in the width direction is not affected by the induced current of the wire harness connected to the PCB substrate 1, so there will be no electromagnetic beam deflection.

[0055] See Figures 3-5 As shown, in a preferred embodiment, there are two antenna modules 2, which are symmetrically arranged on both sides of the centerline along the length direction (i.e., along the X-axis) of the PCB substrate 1. Specifically, the two antenna modules 2 have a mirror-symmetric structure on the PCB substrate 1, resulting in a mirror-symmetric distribution of current in the two antenna modules. This makes the electromagnetic fields generated by the two modules in space symmetrical as well. This symmetry further makes the radiation characteristics of the two antenna modules 2 tend to be consistent in all directions on the horizontal plane of the PCB substrate 1, forming an omnidirectional radiation field with a small non-circularity.

[0056] See Figure 4As shown, in a preferred embodiment, both antenna modules 2 include a vertical portion 4 and a horizontal portion 5. One end of the vertical portion 4 is connected to the horizontal portion 5, and the other end is coupled to the signal processing module 3. The vertical portion 4 is parallel to the width direction of the PCB substrate 1, and the horizontal portion 5 is parallel to the length direction of the PCB substrate 1. The signal processing module 3 is used to generate a first current in the vertical portion 4 along the width direction of the PCB substrate 1. Furthermore, the signal processing module 3 can also generate two second currents in the horizontal portion 5 along the length direction of the PCB substrate 1 and in opposite directions. These two second currents cancel each other out, thus preventing radiation.

[0057] Specifically, the two second currents formed by the horizontal portions 5 of the two antenna modules 2 are along the length direction of the PCB dielectric substrate 1 (i.e., Figure 4 As shown in direction b), and the two directions are opposite, ultimately canceling each other out and producing no electromagnetic radiation. The two antenna modules 2, each with a vertical section 4, form two first currents along the width direction (i.e.,...). Figure 4 The current in the dipole antenna formed by the two antenna modules (in the direction shown in a) is the same and is ultimately superimposed. The induced current in this direction is not affected by the induced current of the wire harness connected to the PCB substrate 1, so there will be no electromagnetic beam deflection.

[0058] Further, see Figure 4 As shown, the horizontal section 5 includes a first horizontal section and a second horizontal section, which are symmetrically arranged on both sides of the centerline of the vertical section 4 along the width direction of the PCB substrate 1, that is, symmetrically arranged based on the vertical section 4. Based on the above structural design, the first horizontal section and the second horizontal section are mirror-symmetrical in structural arrangement, so that the current distribution in the first horizontal section and the second horizontal section is also mirror-symmetrical. This makes the induced currents formed by the two sections equal in magnitude and opposite in direction, ultimately canceling each other out and preventing electromagnetic radiation.

[0059] In one alternative embodiment, both antenna modules 2 employ single-stage T-shaped antennas.

[0060] In the above scheme, the pins or connection points of the two single-stage T-shaped antennas are directly soldered onto the PCB substrate 1. The current signal generated by the signal processing module 3 flows into the vertical part (i.e., vertical part 4) of the two single-stage T-shaped antennas and flows along the two horizontal arms (i.e., horizontal part 5) of the T-shaped antennas to the two ends, ultimately causing the two single-stage T-shaped antennas to combine and radiate to produce an omnidirectional radiation field shape that tends to be circular.

[0061] Example 2

[0062] In the second embodiment of the present invention, a specific structural design scheme for the signal processing module 3 of the door handle PCB antenna is provided based on the first embodiment.

[0063] See Figure 4 and Figure 5 As shown, in this embodiment, the signal processing module 3 includes a coupling slot 31 and a signal transmission line 32. The coupling slot 31 is parallel to the length direction of the PCB substrate 1, and the signal transmission line 32 is connected to the vertical portions 4 of the two antenna modules 2 and coupled to the coupling slot 31. Specifically, the coupling slot 31 is used to form two lines along the length direction (i.e., Figure 5 Two opposite currents (in the direction c shown) are electromagnetically coupled to the signal transmission line 32, inputting opposite current signals to the two antenna modules 2 respectively. Since the two antenna modules 2 are inverted (i.e., their structure and layout are mirror-symmetrical), the currents formed in the vertical parts 4 of the two antenna modules are in the same direction, creating a superposition effect. Furthermore, the induced current in this direction is not affected by the induced current of the wiring harness connected to the PCB substrate 1, thus preventing electromagnetic beam deflection.

[0064] See Figure 4 and Figure 5 As shown, in a preferred embodiment, the signal processing module 3 further includes a first conductor 33, a second conductor 34, and a feed signal line 35. The first conductor 33 and the second conductor 34 are parallel to each other along their length. A coupling gap is located between the first conductor 33 and the second conductor 34. The feed signal line is led out from the first conductor 33 and connected to the second conductor 34 to achieve grounding. The first conductor 33, the second conductor 34, and the feed signal line are used to create two third currents in opposite directions along the length of the PCB substrate 1 through the coupling gap 31.

[0065] Specifically, the feed signal line 35 is connected between the first conductor 33 and the second conductor 34. When current is transmitted through the feed signal line 35, a specific electromagnetic field distribution is formed in the coupling gap 31 between the first conductor 33 and the second conductor 34, making the coupling gap 31 an interface for electromagnetic coupling. This becomes a key link to realize the subsequent electromagnetic coupling and signal transmission between the two antenna modules, and to achieve efficient energy transfer by utilizing the principle of electromagnetic coupling.

[0066] Optionally, both the first conductor 33 and the second conductor 34 can be metal strips, and the second conductor 34 can be used as a metal ground.

[0067] In a preferred embodiment, the first conductor 4 and the second conductor 5 are disposed on one side of the PCB substrate 1 in the thickness direction, and the two antenna modules 2 are disposed on the other side of the PCB substrate 1. Specifically, the first conductor 4 and the second conductor 5 are disposed on the front side of the PCB substrate 1, and the two antenna modules 2 are disposed on the back side of the PCB substrate 1. The first conductor 4, the second conductor 5 and the two antenna modules 2 are not directly connected, but are coupled through the coupling gap 31 of the signal processing module 3. Electromagnetic coupling causes the two antenna modules 2 to generate an equivalent current along the width direction of the PCB substrate 1.

[0068] Further, see Figure 4 As shown, the signal transmission line 32 is a coupled microstrip line, with at least a portion of its structure disposed on both sides of the coupling slot 31 along the width direction of the PCB substrate 1. The coupled microstrip line serves as a carrier for signal transmission between the signal processing module 3 and the two antenna modules 2. It receives energy generated by the coupling slot 31 via electromagnetic coupling and transmits it to the two antenna modules, thereby achieving efficient energy transfer and ensuring signal interaction between different parts of the entire antenna system.

[0069] See Figure 3 and Figure 4 As shown, in a preferred embodiment, the coupling gap 31 includes a gap disposed between the first conductor 33 and the second conductor 34. Specifically, when the current generated by the coupling gap 31 flows through the gap, a changing electromagnetic field is generated around the gap. These electromagnetic fields interact with the signal transmission line 32, and through electromagnetic induction and field coupling effects, energy is transferred from the gap to the signal transmission line 32, thereby achieving efficient energy transmission.

[0070] In an alternative embodiment, the signal processing module 3 preferably employs an inverter, which can be used to generate two inverse current signals and transfer energy to the two antenna modules 2 respectively through electromagnetic coupling.

[0071] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A door handle PCB antenna, characterized in that, The device includes a PCB substrate and an antenna module and a signal processing module disposed on the PCB substrate. The PCB substrate is a long strip-shaped plate structure with varying lengths and widths, and cables are connected to the PCB substrate. The number of antenna modules is at least two, and they are arranged sequentially along the width direction of the PCB substrate. The signal processing module is disposed between the two antenna modules and is coupled to each of the two antenna modules. The signal processing module is used to enable the two antenna modules to generate equivalent currents in the same direction along the width direction of the PCB substrate.

2. The door handle PCB antenna according to claim 1, characterized in that, The number of antenna modules is two, and the two antenna modules are symmetrically arranged on both sides of the center line along the length direction of the PCB substrate.

3. The door handle PCB antenna according to claim 1, characterized in that, Both antenna modules include a vertical section, one end of which is coupled to the signal processing module, and the vertical section is parallel to the width direction of the PCB substrate; wherein, the signal processing module is used to enable the two vertical sections to form an equivalent current in the same direction along the width direction of the PCB substrate.

4. The door handle PCB antenna according to claim 3, characterized in that, The two antenna modules also include a horizontal section, the middle of which is connected to the vertical section, and the horizontal section is parallel to the length direction of the PCB substrate.

5. The door handle PCB antenna according to claim 4, characterized in that, Both of the antenna modules are single-stage T-shaped antennas.

6. The door handle PCB antenna according to claim 3, characterized in that, The signal processing module includes a coupling gap and a signal transmission line. The coupling gap is parallel to the length direction of the PCB substrate, and the signal transmission line is connected to the vertical part and coupled to the coupling gap.

7. The door handle PCB antenna according to claim 6, characterized in that, The signal processing module further includes a first conductor, a second conductor, and a power supply signal line. The first conductor and the second conductor are parallel to the length direction of the PCB substrate. The coupling gap is located between the first conductor and the second conductor. The power supply signal line is led out from the first conductor and connected to the second conductor to achieve grounding. The first conductor, the second conductor, and the power supply signal line are used to make the coupling gap form two reverse currents with opposite directions along the length direction of the PCB substrate.

8. The door handle PCB antenna according to claim 7, characterized in that, The first conductor and the second conductor are disposed on one side of the PCB dielectric substrate in the thickness direction, and the antenna module is disposed on the other side of the PCB dielectric substrate.

9. The door handle PCB antenna according to claim 7, characterized in that, The signal transmission line is a coupled microstrip line, and at least a portion of the structure of the coupled microstrip line is respectively disposed on both sides of the coupling gap.

10. The door handle PCB antenna according to claim 7, characterized in that, The signal processing module is an inverter.

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