Electronic device, side key FPC and processing method for eliminating antenna clutter

Abstract

The application relates to an electronic device, a side key FPC, and a processing method for eliminating antenna clutter, and the electronic device comprises a shell, the shell is provided with a side key, an antenna, the antenna is arranged on the shell, a side key FPC, the side key FPC is connected with the side key and comprises a plate body and a wire connected with the plate body, wherein the wire comprises a first wire, the first wire comprises a main body wire and a branch wire, the branch wire is used for being electrically connected with the main body wire and is used for changing the electrical length of the first wire, so that the absorption frequency of the first wire is located outside the working frequency band of the antenna. By adding the branch wire to the first wire, the geometric length of the first wire is increased, when the geometric length is changed, the electrical length of the first wire can be changed, so that the electrical length of the first wire is not matched with the working frequency band of the antenna (the frequency of the electromagnetic wave absorbed by the first wire is not matched with the working frequency of the antenna), so that the first wire cannot absorb the energy in the working frequency band of the antenna, that is, the in-band performance of the antenna is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment, in particular to an electronic device, a side key FPC and a processing method for eliminating antenna clutter. BACKGROUND

[0002] With the development of communication technology from 1G, 2G to 3G, 4G and 5G, from feature phones to smart phones, from single frequency band to multi-frequency band, and to the current 5G network, the number of antennas used in terminal communication increases, and the antennas are distributed compactly. Considering the balance of factors such as cost, space, power consumption and antenna performance, the phone antenna can be arranged in the middle frame. Specifically, the middle frame is provided with a slot to make the middle frame have the performance of an antenna. At this time, the energy radiated by the antenna is absorbed by the internal metal structure, metal traces and dielectric materials of the phone, and the absorbed energy is eventually consumed in the form of heat, thereby deteriorating the in-band performance of the antenna and reducing the antenna performance index. SUMMARY

[0003] The present application provides an electronic device, a side key FPC and a processing method for eliminating antenna clutter, which can improve the in-band performance of the antenna.

[0004] The first aspect of the present application provides an electronic device, which comprises: a shell provided with a side key; an antenna arranged in the shell; and a side key FPC connected with the side key and comprising a plate body and a trace connected with the plate body; wherein the trace comprises a first trace, the first trace comprises a body line and a branch line, the branch line is used to electrically connect with the body line and change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna.

[0005] In the present application, the branch line is added to the first trace, thereby increasing the geometric length of the first trace. When the geometric length changes, the electrical length of the first trace can be changed, so that the electrical length of the first trace does not match the working frequency band of the antenna (the frequency of the electromagnetic wave absorbed by the first trace does not match the working frequency of the antenna), thereby preventing the first trace from absorbing energy within the working frequency band of the antenna, i.e. the in-band performance of the antenna is high. At the same time, when eliminating the absorption of antenna energy by the side key FPC, it is not necessary to realize by adding capacitors, inductors and other elements to the side key FPC, but by adding a branch line to the first antenna that absorbs the antenna, thereby saving cost. In addition, when a capacitor or inductor element is welded to the side key FPC, the connection reliability between the capacitor or inductor element and the side key FPC decreases with the increase of the number of times the side key is pressed, thereby possibly causing the capacitor or inductor element to fall off. In the present application, the connection reliability between the body line and the branch line is high, thereby improving the in-band performance of the antenna while improving the service life.

[0006] In a possible design, one end of the branch line is used to electrically connect with the body line, and the other end is a free end. In this solution, the branch line is an open circuit line, which functions as a capacitor. Therefore, after the branch line is added, the resonance frequency of the first trace is reduced, i.e., the resonance frequency point of the first trace is moved to a low frequency. At this time, the first trace is less likely to resonate with the antenna, thereby preventing the first trace from absorbing the energy of the antenna in the working frequency band, and improving the in-band performance of the antenna. In addition, the capacitor arranged on the first trace is implemented by the branch line, without the need to solder a capacitor element on the first trace, thereby saving cost and improving the reliability of the first trace.

[0007] In a possible design, both ends of the branch line are used to electrically connect with the body line. In this solution, the branch line is a short circuit line, and after the branch line is added to the first trace, the branch line functions as an inductor arranged on the first trace. Therefore, after the branch line is added, the resonance frequency of the first trace is reduced, i.e., the resonance frequency point of the first trace is moved to a low frequency. At this time, the first trace is less likely to resonate with the antenna, thereby preventing the first trace from absorbing the energy of the antenna in the working frequency band, and improving the in-band performance of the antenna. In addition, the inductor arranged on the first trace is implemented by the branch line, without the need to solder an inductor element on the first trace, thereby saving cost and improving the reliability of the first trace.

[0008] In a possible design, the body line has an opening, and both ends of the branch line are used to electrically connect with both ends of the opening. At this time, the branch line is used to replace a section of the opening of the body line, and when the length of the branch line is different from the length of the line connecting the two ends of the opening, the branch line can change the geometric length of the first trace (increase the geometric length of the first trace), thereby changing the electrical length of the first trace (increase the electrical length of the first trace), and further making the electrical length of the first trace not match the working frequency band of the antenna, so that the first trace does not absorb the energy of the antenna in the working frequency band, and the in-band performance of the antenna is improved.

[0009] In a possible design, the branch line has a preset length, and the preset length is configured to make the electrical length of the first trace not match the electrical length required to absorb the energy of the antenna. By arranging the branch line on the body line of the first trace, the electrical length of the first trace is increased, the resonance frequency of the first trace is reduced, and the resonance frequency point of the first trace is moved to a low frequency. At this time, the first trace is less likely to resonate with the antenna, thereby preventing the first trace from absorbing the energy of the antenna in the working frequency band, and improving the in-band performance of the antenna.

[0010] In a possible design, the shape of the branch line includes one or more of a straight line, a curved line, a broken line, a spiral line, a meandering line, and an irregular line.

[0011] In a possible design, the branch line includes one or more electrically connected units in the thickness direction of the branch line, so as to increase the geometric length of the branch line, and further increase the electrical length of the first trace, so as to make the electrical length of the first trace not match the working frequency band of the antenna. Meanwhile, when the branch line includes multiple electrically connected units in the thickness direction, the space of the branch line in the thickness direction can be reasonably utilized, so as to reduce the space of the branch line in other directions, and reduce the risk of interference between the branch line and other components of the electronic device.

[0012] In a possible design, the body line is integrally formed with the branch line, or the body line is fixedly connected with the branch line. When the body line is integrally formed with the branch line, the reliability between the body line and the branch line is relatively high, and the branch line will not fall off from the body line when the number of pressing times of the side key increases, so as to improve the reliability and service life of the side key FPC, and effectively improve the in-band performance of the antenna. When the body line is fixedly connected with the branch line, the body line and the branch line can be connected by welding or conductive glue.

[0013] The second aspect of the present application provides an electronic device, which includes: a shell provided with a side key; an antenna arranged in the shell; a side key FPC connected with the side key and including a plate body and a trace connected with the plate body; and wherein the trace includes a first trace including a body line and a wave-absorbing material arranged on the body line, and the wave-absorbing material is used to change the electrical length of the first trace, so that the absorption frequency of the first trace is outside the working frequency band of the antenna.

[0014] In the present solution, after the wave-absorbing material is added to the first trace, the wave-absorbing material can change the electrical length of the first trace due to its function of absorbing electromagnetic wave energy, so that the electrical length of the first trace does not match the working frequency band of the antenna (the absorption frequency of the first trace does not match the working frequency of the antenna), thereby making the first trace not absorb energy in the working frequency band of the antenna, i.e., the in-band performance of the antenna is relatively high. Meanwhile, when the absorption of energy in the working frequency band of the antenna by the side key FPC is eliminated, it is not necessary to add components such as capacitors and inductors to the side key FPC, but the wave-absorbing material is added to the first trace, thereby saving cost.

[0015] In a possible design, the wave-absorbing material is attached to the body line.

[0016] In a possible design, the thickness of the wave-absorbing material is 0.2 mm to 0.6 mm. When the thickness of the wave-absorbing material is 0.2 mm to 0.6 mm, the first trace will not absorb energy in the working frequency band of the antenna, ensuring the in-band performance of the antenna, and meanwhile, the waste of the wave-absorbing material can be reduced.

[0017] In a possible design, the wave-absorbing material covers the body wire.

[0018] In a possible design, the preset position of the body wire is provided with the wave-absorbing material, and the preset position is configured as a position at which the body wire absorbs energy of the antenna in the working frequency band. When the wave-absorbing material is arranged at the position at which the first wire generates the wave, the wave at the position can be eliminated, that is, the electrical length of the first wire can be changed, so that the position at which the wave is generated no longer absorbs energy of the antenna in the working frequency band, thereby ensuring the in-band performance of the antenna. Meanwhile, the wave-absorbing material does not need to be arranged at each position of the first wire, thereby saving the wave-absorbing material and reducing the cost.

[0019] In a possible design, the wave-absorbing material is arranged at a position of the first wire at which the wave current is strong.

[0020] In a possible design, the coverage area of the wave-absorbing material is configured to be able to make the electrical length of the first wire not match the electrical length required for absorbing energy of the antenna in the working frequency band.

[0021] The third aspect of the present application provides a side key FPC, which comprises a plate body and a first wire, and the first wire is connected to the plate body; wherein the first wire comprises a body wire and a branch wire, and the branch wire is used to be electrically connected to the body wire.

[0022] In a possible design, one end of the branch wire is used to be electrically connected to the body wire, and the other end is a free end.

[0023] In a possible design, both ends of the branch wire are used to be electrically connected to the body wire.

[0024] The fourth aspect of the present application provides a side key FPC, which comprises a plate body and a first wire, and the first wire is connected to the plate body;

[0025] The first wire comprises a body wire and a wave-absorbing material arranged on the body wire, and the wave-absorbing material is used to change the electrical length of the first wire, so that the absorption frequency of the first wire is located outside the working frequency band of the antenna.

[0026] In a possible design, the wave-absorbing material covers at least part of the body wire.

[0027] The fifth aspect of the present application provides a processing method for eliminating antenna clutter, which is used for eliminating the antenna clutter of an electronic device, the electronic device comprising a side key FPC and an antenna, the side key FPC comprising a plate body and a trace connected to each other, and the processing method comprising: determining a first trace that absorbs the energy of the antenna in a working frequency band; and setting a branch line on the first trace, wherein the branch line is used to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna.

[0028] Therefore, by the above processing method, the electrical length of the first trace can be changed, so that the electrical length of the first trace does not match the working frequency band of the antenna (the frequency of the electromagnetic wave absorbed by the first trace does not match the working frequency of the antenna), so that the first trace does not absorb the energy of the antenna in the working frequency band, that is, the in-band performance of the antenna is high.

[0029] In a possible design, before the branch line is set on the first trace, the processing method further comprises: determining a preset position of the branch line according to the working frequency band of the antenna and the environment in which the first trace is located.

[0030] In a possible design, before the branch line is set on the first trace, the processing method further comprises: determining a preset length of the branch line according to the working frequency band of the antenna and the environment in which the first trace is located.

[0031] In a possible design, whether the electrical length of the first trace after the branch line is set matches the working frequency band of the antenna is determined, and if yes, the preset position and the preset length of the branch line are adjusted.

[0032] In a possible design, the first trace comprises a body line, and at least one end of the branch line is connected to the body line when the branch line is set on the first trace.

[0033] The sixth aspect of the present application provides a processing method for eliminating antenna clutter, which is used for eliminating the antenna clutter of an electronic device, the electronic device comprising a side key FPC and an antenna, the side key FPC comprising a plate body and a trace connected to each other, and the processing method comprising: determining a first trace that absorbs the energy of the antenna in a working frequency band; and setting an absorbing material on the first trace, wherein the absorbing material is used to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna.

[0034] By using the above processing method, the electrical length of the first trace can be changed so that the electrical length of the first trace does not match the operating frequency band of the antenna (the frequency of the electromagnetic wave absorbed by the first trace does not match the operating frequency of the antenna), thereby preventing the first trace from absorbing energy within the operating frequency band of the antenna, that is, the antenna has higher in-band performance.

[0035] In one possible design, before the absorbing material is placed on the first trace, the processing method further includes: determining the preset position of the absorbing material based on the operating frequency band of the antenna.

[0036] In one possible design, before the absorbing material is placed on the wiring, the processing method further includes: determining the coverage area of ​​the absorbing material based on the operating frequency band of the antenna.

[0037] In one possible design, it is determined whether the electrical length of the first trace after the absorbing material is applied matches the operating frequency band of the antenna. If they match, the preset position and coverage area of ​​the absorbing material are adjusted.

[0038] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the electronic device provided in this application in a specific embodiment;

[0040] Figure 2 for Figure 1 A schematic diagram of the structure of the side-key FPC in the first specific embodiment;

[0041] Figure 3 for Figure 2 A magnified view of part I in the middle;

[0042] Figure 4 for Figure 3 A schematic diagram of the structure in another specific embodiment;

[0043] Figure 5 for Figure 3 A structural schematic diagram in yet another specific embodiment;

[0044] Figure 6 for Figure 1 A schematic diagram of the structure of the side-key FPC in the second specific embodiment;

[0045] Figure 7 for Figure 6 A magnified view of a section II;

[0046] Figure 8 for Figure 7Structure schematic diagram in another specific embodiment;

[0047] Figure 9 For Figure 1 Structure schematic diagram of the middle side key FPC in the third specific embodiment;

[0048] Figure 10 For Figure 9 Partial enlarged view of the III part;

[0049] Figure 11 For Figure 10 Structure schematic diagram in another specific embodiment;

[0050] Figure 12 For Figure 1 Structure schematic diagram of the middle side key FPC in the fourth specific embodiment;

[0051] Figure 13 For Figure 1 Structure schematic diagram of the middle side key FPC in the fifth specific embodiment;

[0052] Figure 14 For Figure 13 Partial enlarged view of the IV part.

[0053] Reference signs:

[0054] 1 - side key FPC;

[0055] 11 - first wire;

[0056] 111 - body wire;

[0057] 111a - opening;

[0058] 112 - branch wire;

[0059] 112a - through hole;

[0060] 113 - wave absorbing material;

[0061] 12 - second wire;

[0062] 13 - plate body;

[0063] 2 - shell;

[0064] 21 - side key;

[0065] 22 - middle frame;

[0066] 221 - antenna.

[0067] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification. DETAILED DESCRIPTION

[0068] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below in conjunction with the drawings.

[0069] In a specific embodiment, the present application is further described in detail below by specific embodiments in conjunction with the drawings.

[0070] In an electronic device, the energy of the antenna is absorbed by the metal structure, metal trace, dielectric material, etc. near the middle frame, thereby deteriorating the in-band performance of the antenna and reducing the performance index of the antenna. The middle frame of the electronic device is provided with a side key, and the side key is connected with a side key FPC. The distance between the side key FPC and the antenna is close, which is easy to absorb the radiation energy of the antenna and thus reduce the performance of the antenna. Specifically, the energy of the antenna is easy to couple with the side key FPC, and excite the 1 / 2 wavelength mode of the side key FPC trace. The 1 / 2 wavelength mode absorbs the radiation energy of the antenna, and finally consumes in the form of heat, resulting in efficiency pits of the radiation performance of the antenna, and reducing the in-band mean efficiency of the antenna.

[0071] To solve the technical problem, the embodiments of the present application provide an electronic device, which can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, and a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, a vehicle-mounted device, a smart home device, and / or a smart city device. The embodiments of the present application do not specially limit the specific type of the electronic device.

[0072] The electronic device can include a housing, a processor, a battery, an antenna, a screen, an audio module, a speaker, and the like. The wireless communication function of the electronic device can be realized by the antenna, a mobile communication module, a modulation and demodulation processor, and a baseband processor, etc.

[0073] Specifically, as Figure 1As shown, in this electronic device, the housing 2 includes a mid-frame 22, which is made of metal and has an antenna 221. The antenna 221 is specifically formed by creating an opening in the mid-frame 22. The electronic device also includes a side button 21 located on the housing 2. Users control the electronic device via this side button 21 to perform functions such as powering on / off or adjusting volume. The side button 21 is connected to a side button FPC1, which is connected to the circuit board of the electronic device. When the user operates the side button 21, the signal is transmitted to the circuit board of the electronic device via the side button FPC1, thereby controlling the electronic device.

[0074] Among them, such as Figure 2 As shown, the side-key FPC1 includes a board 13 and traces connected to the board 13. These traces include one or more second traces 12. The absorption frequency of these second traces 12 is outside the operating frequency of the antenna 221. Therefore, the second traces 12 do not absorb energy from the antenna 221 within its operating frequency band, thus not degrading the in-band performance of the antenna 221. When the absorption frequency of the first trace 11 is within the operating frequency band of the antenna 221, the first trace 11 will absorb energy from the antenna 221 within its operating frequency band, thereby reducing the in-band performance of the antenna 221.

[0075] In this embodiment, to prevent the first trace 11 from absorbing energy from the antenna 221 within its operating frequency band and thus reducing the in-band performance of the antenna 221, such as... Figure 3 As shown, a branch line 112 is added to the first trace 11. The branch line 112 is used to electrically connect to the main line 111 of the first trace 11. Therefore, after the branch line 112 is added to the first trace 11, the branch line 112 can change the electrical length of the first trace 11 so that the absorption frequency of the first trace 11 is outside the operating frequency band of the antenna 221. The electrical length of the first trace 11 refers to the ratio of the geometric length of the trace to the wavelength of the electromagnetic wave transmitted on the trace. The geometric length of the first trace 11 is the sum of the lengths of the main trace 111 and the branch trace 112. For the same first trace 11, the electrical length of the first trace 11 will be different when the wavelength of the electromagnetic wave transmitted is different. The electrical length is a physical quantity used to describe the frequency of change of the electromagnetic wave waveform. That is, the electrical length of the first trace 11 is related to the period and frequency of the electromagnetic wave. When the electrical length of the first trace 11 matches the operating frequency band of the antenna 221 (the frequency of the electromagnetic wave absorbed by the first trace 11 matches the operating frequency of the antenna 221), the first trace 11 can absorb the energy of the antenna 221 in the operating frequency band. When the electrical length of the first trace 11 does not match the operating frequency band of the antenna 221 (the frequency of the electromagnetic wave absorbed by the first trace 11 does not match the operating frequency of the antenna 221), the first trace 11 will not absorb the energy of the antenna 221 in the operating frequency band.

[0076] In this embodiment, by adding a branch line 112 to the first trace 11, the geometric length of the first trace 11 is increased. This change in geometric length alters the electrical length of the first trace 11, causing it to become mismatched with the operating frequency band of the antenna 221 (the frequency of the electromagnetic waves absorbed by the first trace 11 does not match the operating frequency of the antenna 221). This prevents the first trace 11 from absorbing energy from the antenna 221 within its operating frequency band, resulting in higher in-band performance for the antenna 221. Furthermore, in this embodiment, eliminating the absorption of energy by the side-key FPC1 from the antenna 221 within its operating frequency band does not require adding capacitors, inductors, or other components to the side-key FPC1. Instead, it is achieved by adding a branch line 112 to the first trace 11, thus saving costs. In addition, when welding capacitors or inductors to the side key FPC, the reliability of the connection between the capacitors or inductors and the side key FPC decreases as the number of times the side key 21 is pressed increases, which may cause the capacitors or inductors to fall off. However, in this embodiment, the connection between the main body line 111 and the branch line 112 has high reliability, which can improve the in-band performance of the antenna 221 while increasing its service life.

[0077] Specifically, the main body line 111 and the branch line 112 are integrally formed. This integral forming ensures high reliability between the main body line 111 and the branch line 112. Even with increased pressing of the side key 21, the branch line 112 will not detach from the main body line 111, thereby improving the reliability and lifespan of the side key FPC1 and effectively enhancing the in-band performance of the antenna 221. Alternatively, the main body line 111 and the branch line 112 can be fixedly connected. In this case, the main body line 111 and the branch line 112 can be welded together or bonded together with conductive adhesive.

[0078] In one possible design, such as Figures 3 to 5 As shown, one end of the branch line 112 is used for electrical connection with the main line 111, and the other end is a free end. That is, in the first trace 11, the branch line 112 is an open line. After adding the branch line 112 to the first trace 11, the branch line 112 acts as a capacitor in the first trace 11. Therefore, adding the branch line 112 can increase the impedance of the first trace 11. The resonant frequency of the first trace 11 satisfies:

[0079]

[0080] As can be seen from the above formula, the resonant frequency of the first trace 11 is related to the parameters inductance L and capacitance C. Therefore, by adding branch line 112 (adding a capacitor to the first trace 11), the resonant frequency of the first trace 11 can be reduced, thus shifting the resonant frequency point of the first trace 11 to a lower frequency. At this time, the first trace 11 is less likely to resonate with the antenna 221, thereby preventing the first trace 11 from absorbing the energy of the antenna 221 in the operating frequency band and improving the in-band performance of the antenna 221. In addition, in this embodiment, the capacitor provided in the first trace 11 is implemented through branch line 112, eliminating the need to solder capacitor components to the first trace 11, thereby saving costs and improving the reliability of the first trace 11.

[0081] In another possible design, such as Figures 6 to 8 As shown, both ends of the branch line 112 are used for electrical connection with the main line 111. That is, in the first trace 11, the branch line 112 is connected in parallel with the main line 111. The branch line 112 is a short circuit, and after adding the branch line 112 to the first trace 11, the function of the branch line 112 is equivalent to the inductance set in the first trace 11. Therefore, adding the trace 112 can increase the impedance of the first trace 11. The resonant frequency of the first trace 11 satisfies:

[0082]

[0083] As can be seen from the above formula, the resonant frequency of the first trace 11 is related to the parameters inductance L and capacitance C. Therefore, by adding branch line 112 (adding an inductor to the first trace 11), the resonant frequency of the first trace 11 can be reduced, thus shifting the resonant frequency point of the first trace 11 to a lower frequency. At this time, the first trace 11 is less likely to resonate with the antenna 221, thereby preventing the first trace 11 from absorbing the energy of the antenna 221 in the operating frequency band and improving the in-band performance of the antenna 221. In addition, in this embodiment, the inductor provided in the first trace 11 is implemented through branch line 112, without the need to solder an inductor component to the first trace 11, thereby saving costs and improving the reliability of the first trace 11.

[0084] Specifically, such as Figure 8As shown, the body line 111 has an opening 111a in the first wire 11, and the two ends of the branch line 112 are respectively electrically connected to the two ends of the opening 111a. At this time, the corresponding part of the opening 111a of the body line 111 is replaced by the branch line 112. When the length of the branch line 112 is different from the length of the line connecting the two ends of the opening 111a, the branch line 112 can change the geometric length of the first wire 11 (increase the geometric length of the first wire 11), thereby changing the electrical length of the first wire 11 (increasing the electrical length of the first wire 11), and further making the electrical length of the first wire 11 not match the working frequency band of the antenna 221, so that the first wire 11 does not absorb the energy of the antenna 221 in the working frequency band, and improves the in-band performance of the antenna 221.

[0085] As shown in the embodiment, Figure 9 and Figure 10 The first wire 11 can be provided with a plurality of branch lines 112. In the first wire 11, part of the branch lines 112 are open lines, and part of the branch lines 112 are short-circuit lines. At this time, it is equivalent to that the first wire 11 is provided with a capacitor and an inductor, thereby increasing the impedance of the first wire 11. The resonance frequency of the first wire 11 satisfies:

[0086]

[0087] From the above formula, it can be seen that the resonance frequency of the first wire 11 is related to the parameters inductance L and capacitance C. Therefore, after increasing the first wire 112 (increasing the capacitance and inductance in the first wire 11), the resonance frequency of the first wire 11 can be reduced, that is, the resonance frequency point of the first wire 11 is moved to low frequency. At this time, the first wire 11 is not easy to resonate with the antenna 221, thereby preventing the first wire 11 from absorbing the energy of the antenna 221 in the working frequency band, and improving the in-band performance of the antenna 221. In addition, in the embodiment, the capacitor and the inductor provided in the first wire 11 are realized by the branch line 112, without the need to solder a capacitor element and an inductor element in the first wire 11, thereby saving cost and improving the reliability of the first wire 11.

[0088] In the above embodiments, the branch line 112 has a preset length, which is configured to make the electrical length of the first wire 11 not match the electrical length required to absorb the energy of the antenna 221 in the working frequency band.

[0089] In the above embodiments, by arranging the branch line 112 on the body line 111 of the first trace 11, the electrical length of the first trace 11 can be increased, the resonance frequency of the first trace 11 can be reduced, and the resonance frequency point of the first trace 11 can be moved to a low frequency. At this time, the first trace 11 is less likely to resonate with the antenna 221, thereby preventing the first trace 11 from absorbing the energy of the antenna 221 in the working frequency band and improving the in-band performance of the antenna 221.

[0090] In addition, the branch line 112 is arranged at a predetermined position of the body line 111, which is configured to be not interfered with other components of the electronic device and to be able to make the electrical length of the first trace 11 not match the electrical length required for absorbing the energy of the antenna 221 in the working frequency band.

[0091] The predetermined length and the predetermined position of the branch line 112 in the first trace 11 can be calculated according to the simulation software, and whether the first trace 11 after arranging the branch line 112 causes the in-band performance of the antenna 221 to decrease due to absorbing the energy of the antenna 221 in the working frequency band can also be calculated by the simulation software. If the first trace 11 does not decrease the in-band performance of the antenna 221, the predetermined length and the predetermined position of the branch line 112 are appropriate. If the first trace 11 still decreases the in-band performance of the antenna 221, the predetermined length and / or the predetermined position of the branch line 112 need to be modified until the first trace 11 does not decrease the in-band performance of the antenna 221.

[0092] In a specific embodiment, the branch line 112 includes one or more layers of electrical connection units along the thickness direction of the branch line 112. Figure 4 and Figure 7 As shown in the above two figures, the branch line 112 includes multiple layers of electrical connection units along the thickness direction of the branch line 112, and the branch line 112 is provided with a through hole 112a. After arranging the through hole 112a, the electrical connection units in each layer can be electrically connected, thereby increasing the geometric length of the branch line 112 and further increasing the electrical length of the first trace 11, so that the electrical length of the first trace 11 does not match the working frequency band of the antenna 221. At the same time, when the branch line 112 includes multiple layers of electrical connection units along the thickness direction, the space along the thickness direction of the branch line 112 can be reasonably utilized, thereby reducing the space occupied by the branch line 112 in other directions and reducing the risk of interference between the branch line 112 and other components of the electronic device.

[0093] On the other hand, as shown in the above two figures, Figure 11As shown, in the electronic device, the branch line 112 can also be reserved. When the certain trace of the side key FPC1 absorbs the energy of the antenna 221 in the working frequency band during use of the electronic device, causing the in-band performance of the antenna 221 to decrease, the reserved branch line 112 can be connected with the trace, so as to change the electrical length of the trace, so that the electrical length of the trace is not matched with the working frequency band of the antenna 221, that is, the trace no longer absorbs the energy of the antenna 221 in the working frequency band, thereby conveniently improving the in-band performance of the antenna 221 and reducing the maintenance difficulty and cost of the antenna. The reserved branch line 112 can be multiple, and the positions of the branch lines 112 are reasonably arranged according to the internal space of the electronic device.

[0094] In the above embodiments, the shape of the branch line 112 is one or more of a straight line, a curved line, a broken line, a spiral line, a snake-shaped line, and an irregular line. In this application, the shape of the branch line 112 is not limited, as long as it can ensure the in-band performance of the antenna 221 and avoid interference between the branch line 112 and other components of the electronic device.

[0095] In addition, the embodiment of the present application also provides a processing method for eliminating the spurs of the antenna 221 of the electronic device. The spurs are caused by the side key FPC1 in the electronic device, that is, the first trace 11 of the side key FPC1 absorbs the radiation energy of the antenna 221, causing the in-band performance of the antenna 221 to decrease. In order to solve the technical problem, the above processing method can specifically include the following steps:

[0096] S:11: determining the first trace 11 that generates the spur;

[0097] S12: providing a branch line 112 on the first trace 11; wherein the branch line 112 is used to change the electrical length of the first trace 11, so that the absorption frequency of the first trace 11 is located outside the working frequency band of the antenna 221.

[0098] In step S11, the first trace 11 that generates the spur in each trace of the side key FPC1 is determined by simulation software. After determining the first trace 11, the branch line 112 is added to the first trace 11 according to step S12. The branch line 112 and the body line 111 of the first trace 11 can be fixedly connected or integrally formed.

[0099] Therefore, by the above step S12, the electrical length of the first trace 11 can be changed, so that the electrical length of the first trace 11 is not matched with the working frequency band of the antenna 221 (the frequency of the electromagnetic wave absorbed by the first trace 11 is not matched with the working frequency of the antenna 221), so that the first trace 11 does not absorb the energy of the antenna 221 in the working frequency band, that is, the in-band performance of the antenna 221 is high.

[0100] Specifically, step S12 can specifically include:

[0101] S121: judging the preset position and the preset length of the branch line 112 according to the working frequency band of the antenna 221 and the environment where the first trace line 11 is located;

[0102] S122: setting the branch line 112 on the first trace line 11.

[0103] In step S121, the preset position and the preset length of the branch line 112 can be judged by simulation software, the preset position is configured to be a position that does not interfere with other components of the electronic device and can make the electrical length of the first trace line 11 not match the electrical length required for absorbing the energy of the antenna 221, and the preset length is configured to make the electrical length of the first trace line 11 not match the electrical length required for absorbing the energy of the antenna 221.

[0104] In the embodiment, when the branch line 112 meets the conditions of the preset position and the preset length, the electrical length of the first trace line 11 does not match the working frequency band of the antenna 221, thereby avoiding the first trace line 11 absorbing the energy of the antenna 221 in the working frequency band and causing the in-band performance of the antenna 221 to decline.

[0105] More specifically, after step S122, the processing method can further include:

[0106] S13: judging whether the electrical length of the first trace line 11 after setting the branch line 112 matches the working frequency band of the antenna 221, if yes, adjusting the preset position and the preset length of the branch line 112, and if no, the preset position and the preset length of the branch line 112 are appropriate.

[0107] In step S13, whether the preset position and the preset length of the branch line 112 are appropriate can be judged by simulation software, and if not, the preset position and the preset length of the branch line 112 are optimized.

[0108] In the above embodiments, step S122 can specifically include:

[0109] S1221: connecting at least one end of the branch line 112 to the body line 111.

[0110] As described above, when one end of the branch line 112 is connected to the main line 111, one end of the branch line 112 is used for electrical connection with the main line 111, and the other end is a free end. That is, in the first routing line 11, the branch line 112 is an open line. After adding the branch line 112 to the first routing line 11, the branch line 112 acts as a capacitor in the first routing line 11. When both ends of the branch line 112 are connected to the main line 111, that is, in the first routing line 11, the branch line 112 is connected in parallel on the main line 111. The branch line 112 is a short line. After adding the branch line 112 to the first routing line 11, the branch line 112 acts as an inductor in the first routing line 11. Therefore, by adding a branch line 112 to the first trace 11, the impedance of the first trace 11 can be increased, thereby reducing the resonant frequency of the first trace 11. This causes the resonant frequency of the first trace 11 to shift to a lower frequency. In this case, the first trace 11 is less likely to resonate with the antenna 221, thus preventing the first trace 11 from absorbing the energy of the antenna 221 in the operating frequency band and improving the in-band performance of the antenna 221. In addition, in this embodiment, the inductance provided on the first trace 11 is implemented through the branch line 112, eliminating the need to solder inductor components to the first trace 11, thereby saving costs and improving the reliability of the first trace 11.

[0111] In another possible design, such as Figures 12 to 14 As shown, the first trace 11 includes a body line 111 and a wave-absorbing material 113 disposed on the body line 111. The wave-absorbing material 113 is used to change the electrical length of the first trace 11 so that the electrical length of the first trace 11 does not match the operating frequency band of the antenna 221, so that the absorption frequency of the first trace 11 is outside the operating frequency band of the antenna 221.

[0112] The absorbing material 113 refers to a material capable of absorbing or reducing the energy of electromagnetic waves received on its surface, thereby reducing electromagnetic interference. Specifically, the absorbing material 113 can be ferrite, graphene, graphite, carbon fiber, silicon carbide, etc. In this application, the specific type of absorbing material 113 is not limited, as long as it can change the impedance of the first trace 11 at the resonant frequency of the antenna 221 (i.e., at the resonant frequency of the antenna 221, the dielectric constant or permeability of the absorbing material 113 is relatively large).

[0113] In the embodiment, after the wave-absorbing material 113 is added to the first wire 11, the wave-absorbing material 113 can change the equivalent dielectric constant of the first wire 11 (compared with the case where the wave-absorbing material 113 is not added, the dielectric constant is increased), that is, the electrical length of the first wire 11 is changed, so that the electrical length of the first wire 11 is not matched with the working frequency band of the antenna 221 (the frequency of the electromagnetic wave absorbed by the first wire 11 is not matched with the working frequency of the antenna 221), so that the first wire 11 does not absorb the energy of the antenna 221 in the working frequency band, that is, the in-band performance of the antenna 221 is high. At the same time, in the embodiment, when the energy of the antenna 221 in the working frequency band is absorbed by the side key FPC1, the capacitor, inductor and other components need not be added to the side key FPC1, but the wave-absorbing material 113 is added to the first wire 11, so that the cost is saved.

[0114] Specifically, the wave-absorbing material 113 is attached to the body wire 111 by a glue material. The glue material can be structural glue or conductive glue.

[0115] More specifically, the thickness of the wave-absorbing material 113 is 0.2mm-0.6mm, for example, the thickness of the wave-absorbing material 113 can be 0.2mm, 0.3mm, 0.5mm, 0.6mm, etc.

[0116] If the thickness of the wave-absorbing material 113 is too small (for example, less than 0.2mm), the content of the wave-absorbing material 113 arranged on the body wire 111 is too small, which cannot effectively change the electrical length of the first wire 11, so that the first wire 11 may still absorb the radiation energy of the antenna 221, and the in-band performance of the antenna 221 is reduced. If the thickness of the wave-absorbing material 113 is too large (for example, greater than 0.6mm), the electrical length of the first wire 11 can be ensured to be not matched with the working frequency band of the antenna 221, so that the first wire 11 does not absorb the energy of the antenna 221 in the working frequency band, and the in-band performance of the antenna 221 is ensured. However, when the thickness of the wave-absorbing material 113 is too large, the in-band performance of the antenna 221 will not be further increased, which leads to the waste of the wave-absorbing material 113. Therefore, when the thickness of the wave-absorbing material 113 is 0.2mm-0.6mm, the first wire 11 does not absorb the energy of the antenna 221 in the working frequency band, the in-band performance of the antenna 221 is ensured, and the waste of the wave-absorbing material 113 is reduced.

[0117] In the first specific embodiment, as shown in FIG. 1, Figure 12As shown, the wave-absorbing material 113 covers the body wire 111, i.e. the wave-absorbing material 113 is arranged at each position of the first wire 11, so that the first wire 11 at any position can not absorb the radiation energy of the antenna 221 in the working frequency band, effectively preventing the first wire 11 from absorbing the energy of the antenna 221 in the working frequency band, and improving the in-band performance of the antenna 221.

[0118] In addition, the side key FPC1 can include a plurality of first wires 11, and each first wire 11 can be provided with a wave-absorbing material 113, so that the electrical length of each first wire 11 is not matched with the working frequency band of the antenna 221, thereby preventing each first wire 11 from absorbing the energy of the antenna 221 in the working frequency band. Alternatively, in the side key FPC1, each wire (including the second wire 112) can be provided with a wave-absorbing material 113, so that the electrical length of each wire in the side key FPC1 is not matched with the working frequency band of the antenna 221, further preventing each wire of the side key FPC1 from absorbing the energy of the antenna 221 in the working frequency band, and improving the in-band performance of the antenna 221.

[0119] In a second specific embodiment, as shown in Figure 13 In the first wire 11, a preset position of the body wire 111 is provided with a wave-absorbing material 113, and the preset position is a position where the first wire 11 absorbs the energy of the antenna 221 in the working frequency band, i.e. the preset position is a position where the first wire 11 generates spurs.

[0120] In this embodiment, when the wave-absorbing material 113 is arranged at the position where the first wire 11 generates spurs, the spurs at this position can be eliminated, i.e. the electrical length of the first wire 11 is changed, so that the position where the spurs are generated no longer absorbs the energy of the antenna 221 in the working frequency band, ensuring the in-band performance of the antenna 221. At the same time, in this embodiment, the wave-absorbing material 113 does not need to be arranged at each position of the first wire 11, so that the wave-absorbing material can be saved, and the cost is reduced.

[0121] In a third specific embodiment, in the first wire 11, a preset position of the body wire 111 is provided with a wave-absorbing material 113, and the preset position is a position where the first wire 11 has a strong current of spurs, and in the first wire 11, the absorption of the energy of the antenna 221 mainly occurs at the position where the spurs have a strong current.

[0122] In this embodiment, when the wave-absorbing material 113 is arranged at the position where the first wire 11 has a strong current of spurs, the electrical length of the first wire 11 at this position is changed, and the electrical length is not matched with the working frequency band of the antenna 221, so that the position where the spurs have a strong current no longer absorbs the energy of the antenna 221 in the working frequency band, and the in-band performance of the antenna 221 is improved.

[0123] Specifically, the coverage area of the wave-absorbing material 113 is configured to be able to cause the electrical length of the first trace 11 to be mismatched with the electrical length required by the energy absorbed by the antenna 221.

[0124] In the embodiment, when the wave-absorbing material 113 covers part of the body wire 111, the coverage area of the wave-absorbing material 113 satisfies the above condition, wherein the coverage area of the wave-absorbing material 113 in the first trace 11 and the preset position can be calculated according to the simulation software, and whether the first trace 11 causes the in-band performance of the antenna 221 to decrease after the wave-absorbing material 113 is arranged can also be calculated by the simulation software. If the first trace 11 does not decrease the in-band performance of the antenna 221, the coverage area of the wave-absorbing material 113 and the preset position are appropriate, and if the first trace 11 still decreases the in-band performance of the antenna 221, the coverage area of the wave-absorbing material 113 and / or the preset position need to be modified until the first trace 11 does not decrease the in-band performance of the antenna 221.

[0125] In addition, the embodiment of the present application further provides a processing method for eliminating the spurs of the antenna 221 of an electronic device, wherein the spurs are caused by the first trace 11 of the side key FPC1, that is, the first trace 11 of the side key FPC1 absorbs the radiation energy of the antenna 221 in the working frequency band, causing the in-band performance of the antenna 221 to decrease. In order to solve the technical problem, the above processing method can specifically include the following steps:

[0126] S21: determining the first trace 11 that causes the spurs;

[0127] S22: arranging a wave-absorbing material 113 on the first trace 11; wherein the wave-absorbing material 113 is used to change the electrical length of the first trace 11, so that the absorption frequency of the first trace 11 is located outside the working frequency band of the antenna 221.

[0128] In step S21, the first trace 11 that causes the spurs in each trace of the side key FPC1 is determined by the simulation software. After the first trace 11 is determined, the wave-absorbing material 113 is arranged on the first trace 11 according to step S22, and the wave-absorbing material 113 and the body wire 111 of the first trace 11 can be adhered by a glue material.

[0129] Therefore, by the above step S12, the electrical length of the first trace 11 can be changed, so that the electrical length of the first trace 11 is mismatched with the working frequency band of the antenna 221 (the frequency of the electromagnetic wave absorbed by the first trace 11 is mismatched with the working frequency of the antenna 221), so that the first trace 11 does not absorb the energy of the antenna 221 in the working frequency band, that is, the in-band performance of the antenna 221 is high.

[0130] Specifically, step S22 can specifically include:

[0131] S221: judging the preset position of the wave-absorbing material 113 according to the working frequency band of the antenna 221, and judging the coverage area of the wave-absorbing material 113 according to the working frequency band of the antenna 221;

[0132] S222: disposing the wave-absorbing material 113 on the first trace 11, and the wave-absorbing material 113 is disposed at the preset position, and the area of the wave-absorbing material 113 is the coverage area.

[0133] In step S221, the setting position and the coverage area of the wave-absorbing material 113 can be judged by simulation software. The preset position is configured to be at a position where spurs are generated in the first trace 11, or at a position where the current of the spurs is strong in the first trace 11. The coverage area is configured to be able to make the electrical length of the first trace 11 not match the electrical length required by the energy of the antenna 221 in the working frequency band.

[0134] In the embodiment, when the wave-absorbing material 113 meets the conditions of the preset position and the coverage area, the electrical length of the first trace 11 after the wave-absorbing material 113 is disposed does not match the working frequency band of the antenna 221, so that the first trace 11 does not absorb the energy of the antenna 221 in the working frequency band, and the in-band performance of the antenna 221 is not reduced.

[0135] More specifically, after step S222, the processing method can further include:

[0136] S23: judging whether the first trace 11 after the wave-absorbing material 113 is disposed generates spurs, that is, judging whether the electrical length of the first trace 11 after the wave-absorbing material 113 is disposed matches the working frequency band of the antenna 221. If it matches (if spurs are generated), the preset position and the coverage area of the wave-absorbing material 113 are adjusted. If it does not match (no spurs are generated), the preset position and the coverage area of the wave-absorbing material 113 of the first trace 11 are appropriate.

[0137] In step S23, whether the preset position and the coverage area of the wave-absorbing material 113 are appropriate can be judged by simulation software. If they are not appropriate, the preset position and the coverage area of the wave-absorbing material 113 are optimized.

[0138] It should be noted that part of the patent application file contains copyrighted material. The copyright owner reserves all rights except that making copies of the patent document or record of the patent file in the patent office is permitted.

Claims

1. An electronic device, comprising: The electronic device comprises: a shell provided with a side key; an antenna arranged on the shell; a side key FPC connected with the side key and comprising a plate body and a trace connected with the plate body; wherein the trace comprises a first trace, the first trace comprises a main body trace and a branch trace, the branch trace is used to be electrically connected with the main body trace, to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna; the branch trace has a preset length, the preset length is configured to be able to make the electrical length of the first trace not match the electrical length required for absorbing the energy of the antenna in the working frequency band, and the branch trace is used to reduce the resonance frequency of the first trace.

2. The electronic device of claim 1, wherein, One end of the branch trace is used to be electrically connected with the main body trace, and the other end is a free end.

3. The electronic device of claim 1, wherein, Both ends of the branch trace are used to be electrically connected with the main body trace.

4. The electronic device of claim 3, wherein, The main body trace has an opening, and both ends of the branch trace are used to be electrically connected with both ends of the opening.

5. The electronic device of any of claims 1-4, wherein, The shape of the branch trace comprises one or more of a straight line, a broken line, a spiral line, a snake-shaped line, and an irregular line.

6. The electronic device of any one of claims 1-4, wherein, In the thickness direction of the branch trace, the branch trace comprises one or more layers of electrically connected units.

7. The electronic device of any one of claims 1-4, wherein, The main body trace and the branch trace are integrally formed, or the main body trace and the branch trace are fixedly connected.

8. An electronic device, comprising: The electronic device comprises: a shell provided with a side key; an antenna arranged on the shell; a side key FPC connected with the side key and comprising a plate body and a trace connected with the plate body; wherein the trace comprises a first trace, the first trace comprises a main body trace and a branch trace, the branch trace is used to be electrically connected with the main body trace, to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna; the branch trace has a preset length, the preset length is configured to be able to make the electrical length of the first trace not match the electrical length required for absorbing the energy of the antenna in the working frequency band, and the branch trace is used to reduce the resonance frequency of the first trace.

9. The electronic device of claim 8, wherein, One end of the branch trace is used to be electrically connected with the main body trace, and the other end is a free end.

10. The electronic device of claim 8, wherein, Both ends of the branch trace are used to be electrically connected with the main body trace.

11. The electronic device of any of claims 8-10, wherein, The main body trace has an opening, and both ends of the branch trace are used to be electrically connected with both ends of the opening.

12. A side key FPC, characterized by, The shape of the branch trace comprises one or more of a straight line, a broken line, a spiral line, a snake-shaped line, and an irregular line. In the thickness direction of the branch trace, the branch trace comprises one or more layers of electrically connected units.

13. The side key FPC of claim 12, wherein, The main body trace and the branch trace are integrally formed, or the main body trace and the branch trace are fixedly connected.

14. The side key FPC of claim 12, wherein, The electronic device comprises:

15. A side key FPC, characterized by, a shell provided with a side key; an antenna arranged on the shell; a side key FPC connected with the side key and comprising a plate body and a trace connected with the plate body; wherein the trace comprises a first trace, the first trace comprises a main body trace and a branch trace, the branch trace is used to be electrically connected with the main body trace, to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna; the branch trace has a preset length, the preset length is configured to be able to make the electrical length of the first trace not match the electrical length required for absorbing the energy of the antenna in the working frequency band, and the branch trace is used to reduce the resonance frequency of the first trace. One end of the branch trace is used to be electrically connected with the main body trace, and the other end is a free end. Both ends of the branch trace are used to be electrically connected with the main body trace. The main body trace has an opening, and both ends of the branch trace are used to be electrically connected with both ends of the opening. The shape of the branch trace comprises one or more of a straight line, a broken line, a spiral line, a snake-shaped line, and an irregular line. In the thickness direction of the branch trace, the branch trace comprises one or more layers of electrically connected units. The main body trace and the branch trace are integrally formed, or the main body trace and the branch trace are fixedly connected. The electronic device comprises: a shell provided with a side key; an antenna arranged on the shell; a side key FPC connected with the side key and comprising a plate body and a trace connected with the plate body; wherein the trace comprises a first trace, the first trace comprises a main body trace and a branch trace, the branch trace is used to be electrically connected with the main body trace, to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna; the branch trace has a preset length, the preset length is configured to be able to make the electrical length of the first trace not match the electrical length required for absorbing the energy of the antenna in the working frequency band, and the branch trace is used to reduce the resonance frequency of the first trace. One end of the branch trace is used to be electrically connected with the main body trace, and the other end is a free end. Both ends of the branch trace are used to be electrically connected with the main body trace. The main body trace has an opening, and both ends of the branch trace are used to be electrically connected with both ends of the opening. The shape of the branch trace comprises one or more of a straight line, a broken line, a spiral line, a snake-shaped line, and an irregular line. In the thickness direction of the branch trace, the branch trace comprises one or more layers of electrically connected units. The main body trace and the branch trace are integrally formed, or the main body trace and the branch trace are fixedly connected. The absorbing material is arranged at the position of the strong current point of the first trace.

16. A processing method for eliminating spurs of an antenna of an electronic device, for eliminating spurs of an antenna of an electronic device, characterized in that, The electronic device includes a side key FPC and an antenna, the side key FPC includes a plate body and a trace connected to each other, and the processing method includes: judging a first trace that absorbs energy of the antenna in a working frequency band; judging a preset position of arranging a branch trace according to the working frequency band of the antenna and an environment in which the first trace is located; arranging the branch trace at the preset position of the first trace; The branch trace is used to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna, and the branch trace is used to reduce the resonant frequency of the first trace.

17. The treatment method of claim 16, wherein, Before the branch trace is arranged at the first trace, the processing method further includes: judging a preset length of the branch trace according to the working frequency band of the antenna and the environment in which the first trace is located.

18. The processing method of claim 16, wherein, judging whether the electrical length of the first trace after arranging the branch trace matches the working frequency band of the antenna, and if so, adjusting the preset position and the preset length of the branch trace.

19. The treatment method according to any one of claims 16 to 18, characterized in that, The first trace includes a body trace, and at least one end of the branch trace is connected to the body trace when the branch trace is arranged at the first trace.

20. A processing method for eliminating spurs of an antenna of an electronic device, for eliminating spurs of an antenna of an electronic device, characterized in that, The electronic device includes a side key FPC and an antenna, the side key FPC includes a plate body and a trace connected to each other, and the processing method includes: judging a first trace that absorbs energy of the antenna in a working frequency band; judging a preset position of arranging an absorbing material according to the working frequency band of the antenna; arranging the absorbing material at the preset position of the first trace; The absorbing material is used to change the electrical length of the first trace, so that the absorption frequency of the first trace is located outside the working frequency band of the antenna.

21. The treatment method of claim 20, wherein, Before the absorbing material is arranged at the trace, the processing method further includes: judging a coverage area of the absorbing material according to the working frequency band of the antenna.

22. The treatment method of claim 20, wherein, judging whether the electrical length of the first trace after arranging the absorbing material matches the working frequency band of the antenna, and if so, adjusting the preset position and the coverage area of the absorbing material.

Images