CN108011192A - Non-linear component, board structure of circuit and terminal device - Google Patents

Abstract

The embodiment of the present application relates to the field of terminal technology, and discloses a nonlinear component, a circuit board structure and a terminal device. Among them, the nonlinear component is applied to a terminal device with an antenna, and the nonlinear component is located in the clearance area of the antenna; the nonlinear component includes a nonlinear device and a filter device, and the nonlinear device is connected to the filter device; the filter device is used to prevent the energy radiated by the antenna Coupling to a nonlinear device causes the nonlinear device to generate higher harmonics. The nonlinear component, circuit board structure, and terminal equipment provided by the embodiments of the present application can prevent the energy radiated by the antenna from being coupled by the nonlinear device near the antenna to generate high-order harmonics that are transmitted to the antenna, causing the antenna to generate radiation spurious, thereby from the source Eliminate the causes of some antenna radiation spurs and improve the radiation performance of the antenna.

Description

Nonlinear Components, Board Structures, and End Equipment

technical field

The present application relates to the technical field of terminals, in particular to a nonlinear component, a circuit board structure and a terminal device.

Background technique

As a mandatory certification indicator for electronic equipment, radiation spurious is the most complicated and difficult problem in all certifications. Especially for the Global System for Mobile Communication (GSM) frequency band, because its own power is particularly high, it is easy to excite strong energy in an instant and cause the radiation of spurious harmonics to exceed the standard. In actual use, the third harmonic of GSM900 tends to exceed the standard, and the second or third harmonic of GSM 1800 exceeds the standard.

For radio frequency signals, the transmitted signal will not only contain available signals (for example, GSM 900), but often also contain second (1800GHz)/third harmonic components (2700GHz). In practical applications, mainly the third harmonic will exceed the standard. Similarly, when the third harmonic energy of the radio frequency signal reaches the third resonance of the antenna, the energy of these higher harmonics will be radiated out, resulting in excessive radiation spurious.

Therefore, how to improve the radiation spurious situation of the terminal equipment has become an urgent problem to be solved.

Contents of the invention

Embodiments of the present application provide a nonlinear component, a circuit board structure, and a terminal device, which can effectively reduce the influence of nonlinear devices close to the antenna on the radiation performance of the antenna.

In the first aspect, an embodiment of the present application provides a nonlinear component, the nonlinear component is applied to a terminal device with an antenna, and the nonlinear component is located in the clearance area of the antenna; the nonlinear component includes a nonlinear A device and a filter device, the nonlinear device is connected to the filter device; the filter device is used to prevent the energy radiated by the antenna from coupling to the nonlinear device and cause the nonlinear device to generate higher harmonics.

In a second aspect, an embodiment of the present application provides a circuit board structure, the circuit board structure includes a main board and the nonlinear component described in the first aspect above.

In a third aspect, an embodiment of the present application further provides a terminal device, the terminal device includes an antenna, and the nonlinear device and the filter device described in the first aspect above.

The nonlinear component, circuit board structure, and terminal equipment provided by the embodiments of the present application can prevent the nonlinear device near the antenna from coupling the energy radiated by the antenna to generate high-order harmonics that are transmitted to the antenna, causing the antenna to generate radiation spurious, thereby from the source Eliminate the causes of some antenna radiation spurs and improve the radiation performance of the antenna.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a terminal device disclosed in an embodiment of the present application;

FIG. 2A is a structural block diagram of a terminal device disclosed in an embodiment of the present application;

FIG. 2B is a schematic diagram of the back of a terminal device disclosed in an embodiment of the present application;

FIG. 3 is a schematic diagram of a connection relationship between a nonlinear device and a filter device disclosed in an embodiment of the present application;

Fig. 4 is a schematic diagram of the connection relationship between another linear device and a filter device disclosed in the embodiment of the present application;

Fig. 5 is a schematic diagram of the connection relationship between another linear device and a filter device disclosed in the embodiment of the present application;

Fig. 6 is a schematic diagram of the connection relationship between another linear device and a filter device disclosed in the embodiment of the present application;

FIG. 7 is a structural block diagram of a nonlinear component disclosed in the embodiment of the present application;

FIG. 8 is a structural block diagram of a circuit board structure disclosed in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a terminal device disclosed in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the application, not all of them. . Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of the embodiments of the present application, it should be understood that the orientation or positional relationship indicated by the term "thickness" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than implying Or indicates that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be construed as limiting the application, and the first and second are only for distinguishing, not referring to a specific Object.

The embodiment of the present application provides a nonlinear component and terminal equipment, which can prevent the nonlinear device near the antenna from coupling the energy radiated by the antenna to generate high-order harmonics that are transmitted to the antenna, causing the antenna to generate radiation spurious, thereby eliminating it from the source Part of the cause of antenna radiation spurious, improve the radiation performance of the antenna. Each will be described in detail below.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a terminal device 100 disclosed in an embodiment of the present application. As shown in FIG. 1 , a terminal device 100 includes an antenna 101 , a flexible printed circuit (Flexible Printed Circuit, FPC) 102 , a nonlinear device 103 and a main board 104 . Wherein, both the FPC 102 and the nonlinear device 103 are located in the clearance area of the antenna 101 , and the nonlinear device 103 and the main board 104 are connected through the FPC 102 .

Specifically, the nonlinear device 103 may be various devices or a combination of devices in the terminal device, for example, a photosensitive component in a camera, a fingerprint holder of a fingerprint sensor, and the like. The antenna 101 can be a main antenna or a diversity wire.

In the embodiment of the present application, since the nonlinear device 103 and the FPC 102 are located in the clearance area of the antenna, when the antenna is transmitting a radio frequency signal, the energy of the radio frequency signal is radiated through the antenna, and the FPC 102, as the main carrier of coupling energy around the antenna, will couple The energy of the radio frequency signal is transmitted to the nonlinear device 103; the nonlinear device 103 converts the energy of the obtained radio frequency signal into the second harmonic and the third harmonic, and then these higher harmonics are conducted to the antenna and follow the radio frequency signal Be radiated out, resulting in excessive radiation spurious.

In the radio frequency signal emitted by the antenna, especially for the GSM frequency band, due to its high power, it is very easy to stimulate high-intensity energy in an instant and cause the radiation spurious to exceed the standard; in practical applications, especially the third harmonic radiation spurious Exceeding the standard is most likely to occur. Therefore, there is an urgent need for methods to suppress the excessive third harmonic radiation of GSM900 caused by nonlinear devices close to the antenna.

Please refer to FIG. 2A. FIG. 2A is a structural block diagram of a terminal device 200 disclosed in an embodiment of the present application. As shown in FIG. 2A , a terminal device 200 includes a nonlinear device 10 and a filter device 20 . The nonlinear device 10 and the filter device 20 can also constitute a nonlinear component, and its specific content will be specifically described in the embodiment corresponding to FIG. 7 . In addition, the terminal device 200 also includes an antenna, which is not shown in FIG. 2 . Wherein, the nonlinear device 10 is located in the clearance area of the antenna, and the nonlinear device 10 is connected with the filter device 20 .

In the embodiment of the present application, the filtering device 20 is used to prevent the energy radiated by the antenna from being coupled to the nonlinear device 10 to cause the nonlinear device to generate higher harmonics. Specifically, the filter device 20 filters out the target energy that will be transmitted to the nonlinear device 10 , the target energy is the energy radiated by the antenna coupled with the conductive wire connecting the nonlinear device 10 and other components in the terminal device.

It can be seen that the terminal equipment described in Figure 2A can prevent the energy radiated by the antenna from coupling to the nonlinear device and cause the nonlinear device to generate higher harmonics, which are conducted to the antenna and then emitted together with the radio frequency signal; therefore , the terminal device can improve the radiation spurious situation and improve the radiation performance of the antenna.

Specifically, the nonlinear device 10 has a power supply pin 11, a clock pin 12, and an enable pin 13; the filter device 20 filters out the The target energy of the nonlinear device 10 .

In the embodiment of the present application, the terminal device 200 may further include a main board 30 , and the nonlinear device 10 is connected to the main board 30 via the filter device 20 ; the main board 30 may include a first terminal 31 , a second terminal 32 and a third terminal 33 .

In the embodiment of the present application, the terminal device 200 may further include a flexible printed circuit (Flexible Printed Circuit, FPC). The FPC is used to connect the nonlinear device 10 and the main board 30 . It can be seen from FIG. 1 that if the nonlinear device 10 is located in the clearance area of the antenna, the FPC used to connect the nonlinear device 10 and the main board 30 is also located in the clearance area of the antenna, and often "crosses" the antenna to connect the nonlinear device 10 and the main board. 30, that is, the vertical projection of the FPC intersects the antenna.

Therefore, due to the position of the FPC, the FPC will couple the energy radiated by the antenna, and conduct the coupled energy to the nonlinear device 10, causing the nonlinear device 10 to generate high-order harmonics, thereby causing the radiation spurious to exceed the standard.

Therefore, as an optional embodiment, the filter device 20 can be located at the connection between the FPC and the main board 30, or at the connection between the FPC and the nonlinear device 10; , SMT) connected to one side of the flexible circuit board. Therefore, the coupling energy can be filtered out before the FPC conducts it to the nonlinear device 10, thereby improving the problem of excessive radiation strays.

As an optional implementation, the terminal device 200 may also include a back cover 50, and the back cover 50 may include a frame and a battery cover; wherein, the back cover 50 has a housing cavity, the nonlinear device 10, the filter device 20, the main board 30 and The FPC can be disposed in the receiving cavity, and the antenna can be disposed on the inner surface of the rear cover 50 .

Please refer to FIG. 2B . FIG. 2B is a schematic rear view of a terminal device disclosed in an embodiment of the present application. As an optional implementation manner, the back cover 50 is provided with a plurality of slits 51 corresponding to the positions of the antennas to form a clearance area on the back cover 50 for sending and receiving signals of the antennas. Wherein, the plurality of slits mentioned above are parallel slits, and insulating materials such as resin material or glue are filled between two adjacent slits to enhance the strength of the back cover 50 .

As an optional embodiment, the above-mentioned multiple slits 51 are micro-slits, the slit width is 0.05 mm, 0.3 mm, or any value from 0.05 mm to 0.3 mm, and the number of multiple slits 51 is 5 or 10 Or any number from 5 to 10. Among them, the slit width of the micro-slit is greater than 0.05mm, so that the micro-slit cannot be directly distinguished by the user, and ensures the lowest RF efficiency of the rear cover 50; Still cannot be identified by the user, and the radio frequency efficiency of the rear cover 50 is improved. Similarly, the minimum number of micro-slits is controlled at 5 to ensure the radiation performance of the back cover 50 , and the maximum number of micro-slits is controlled at 10 to ensure the appearance requirements of the back cover 50 .

As an optional implementation manner, the filter device 20 may include a first capacitor 201 , a second capacitor 202 and a third capacitor 203 . The first capacitor 201 includes a first end 2011 and a second end 2012 , the second capacitor 202 includes a first end 2021 and a second end 2022 , and the third capacitor 203 includes a first end 2031 and a second end 2032 . In this embodiment, please refer to FIG. 3 for the connection relationship between the nonlinear device 10 and the filter device 20 .

As shown in Figure 3, the power supply pin 11 is connected to the first terminal 2011 of the first capacitor 201, and the second terminal 2012 of the first capacitor 201 is grounded; the clock pin 12 is connected to the first terminal 2021 of the second capacitor 202, and the second capacitor The second terminal 2022 of 202 is grounded; the enable pin 13 is connected to the first terminal 2031 of the third capacitor 203, and the second terminal 2032 of the third capacitor 203 is grounded.

As an optional implementation, when the antenna works in the GSM 900 frequency band, in order to prevent the energy radiated by the antenna from being coupled to the nonlinear device 10 and cause the nonlinear device 10 to generate 2700MHz higher harmonics, the first capacitor 201, The capacitance values of the second capacitor 202 and the third capacitor 203 are set to match the frequency of 900Mhz, so as to filter the energy of the GSM 900 that will be transmitted to the nonlinear device 10 and prevent the nonlinear device 10 from generating higher harmonics.

As another optional implementation manner, the filter device 20 may include a first inductor 204 , a second inductor 205 and a third inductor 206 . In this embodiment, please refer to FIG. 4 for the connection relationship between the nonlinear device 10 and the filter device 20 .

As shown in Figure 4, the power supply pin 11 is connected to the first end 31 of the main board 30 through the first inductance 204, the clock pin 12 is connected to the second end 32 of the main board 30 through the second inductance 205, and the time can pin 13 is through The third inductor 206 is connected to the third terminal 33 of the motherboard 30 .

As an optional implementation, when the antenna works in the GSM 900 frequency band, in order to prevent the energy radiated by the antenna from being coupled to the nonlinear device 10 and cause the nonlinear device 10 to generate 2700MHz higher harmonics, the first inductor 204, The capacitance values of the second inductor 205 and the third inductor 206 are set to match the frequency of 900Mhz, so as to filter the energy of the GSM 900 that will be transmitted to the nonlinear device 10 and prevent the nonlinear device 10 from generating higher harmonics.

As another optional implementation manner, the filter device 20 may include a first RLC parallel resonant circuit 207 , a second RLC parallel resonant circuit 208 and a third RLC parallel resonant circuit 209 . The first RLC parallel resonant circuit 207 includes an input end 2071 and an output end 2072 , the second parallel resonant circuit 208 includes an input end 2081 and an output end 2082 , and the third RLC parallel resonant circuit 209 includes an input end 2091 and an output end 2092 . In this embodiment, please refer to FIG. 5 for the connection relationship between the nonlinear device 10 and the filter device 20 .

As shown in Figure 5, the power supply pin 11 is connected to the input end 2071 of the first RLC parallel resonant circuit 207, the output end 2072 of the first RLC parallel resonant circuit 207 is grounded; the clock pin 12 is connected to the input end of the second parallel resonant circuit 208 2081, the output end 2082 of the second parallel resonant circuit 208 is grounded; the enable pin 13 is connected to the input end 2091 of the third RLC parallel resonant circuit 209, and the output end 2092 of the third RLC parallel resonant circuit 209 is grounded.

As an optional implementation, when the antenna works in the GSM 900 frequency band, in order to prevent the energy radiated by the antenna from coupling to the nonlinear device 10 and causing the nonlinear device 10 to generate 2700MHz higher harmonics, the first RLC can be resonated in parallel The capacitance, resistance and inductance values of the circuit 207, the second RLC parallel resonant circuit 208 and the third RLC parallel resonant circuit 209 are set so that the resonant circuit matches the frequency of 900Mhz, thereby filtering out the The energy of GSM900 can prevent the nonlinear device 10 from generating high-order harmonics.

As another optional implementation manner, the filter device 20 may include a first RLC series resonant circuit 210 , a second RLC series resonant circuit 211 and a third RLC series resonant circuit 212 . In this embodiment, please refer to FIG. 6 for the connection relationship between the nonlinear device 10 and the filter device 20 .

As shown in Figure 6, the power supply pin 11 is connected to the first end 31 of the main board 30 through the first RLC series resonant circuit 210, and the clock pin 12 is connected to the second end 32 of the main board 30 through the second RLC series resonant circuit 211, The timing pin 13 is connected to the third terminal 33 of the main board 30 via the third RLC series resonant circuit 212 .

As an optional implementation, when the antenna works in the GSM 900 frequency band, in order to prevent the energy radiated by the antenna from being coupled to the nonlinear device 10 and cause the nonlinear device 10 to generate a 2700MHz high-order harmonic, the first RLC series resonance can be The capacitance, resistance and inductance values of the circuit 210, the second RLC series resonant circuit 211 and the third RLC series resonant circuit 212 are set so that the resonant circuit matches the frequency of 900Mhz, thereby filtering out the The energy of GSM900 can prevent the nonlinear device 10 from generating high-order harmonics.

Please refer to FIG. 7 , which is a structural block diagram of a nonlinear component 700 disclosed in an embodiment of the present application. As shown in FIG. 7 , the nonlinear component 700 includes a nonlinear device 10 and a filter device 20 , and the nonlinear device 10 is connected to the filter device 20 . Wherein, the nonlinear component 700 can be applied to a terminal device with an antenna, and the nonlinear component 700 is located in a clear area of the antenna.

In the embodiment of the present application, the filtering device 20 is used to prevent the energy radiated by the antenna from being coupled to the nonlinear device 10 to cause the nonlinear device to generate higher harmonics. Specifically, the filter device 20 filters out the target energy that will be transmitted to the nonlinear device 10 , the target energy is the energy radiated by the antenna coupled with the conductive wire connecting the nonlinear device 10 and other components in the terminal device.

Wherein, for the connection relationship between the nonlinear device 10 and the filter device 20 , reference may be made to the specific descriptions of the embodiments corresponding to FIGS. 3 to 6 , which will not be repeated here.

It can be seen that the nonlinear component described in Figure 7 can prevent the energy radiated by the antenna from coupling to the nonlinear device and cause the nonlinear device to generate higher harmonics, which are transmitted to the antenna and then emitted together with the radio frequency signal; Therefore, using the nonlinear component can improve the radiation spurious situation and improve the radiation performance of the antenna.

Please refer to FIG. 8 . FIG. 8 is a structural block diagram of a circuit board structure disclosed in an embodiment of the present application. As shown in FIG. 8 , the circuit board structure 800 includes a main board 801 and a nonlinear component 802 , and the main board 801 is connected to the nonlinear component 802 .

In the embodiment of the present application, the nonlinear component 802 may include a nonlinear device and a filter device. The filter device is used to prevent the energy radiated by the antenna from being coupled to the nonlinear device and cause the nonlinear device to generate higher harmonics. Specifically, the filter device filters out the target energy that will be conducted to the nonlinear device, and the target energy is the energy radiated by the antenna coupled with the conductive wire connecting the nonlinear device and other components in the terminal device.

For details about the connection relationship between the nonlinear device and the filter device, reference may be made to the specific descriptions of the embodiments corresponding to FIG. 3 to FIG. 6 , which will not be repeated here.

It can be seen that the circuit board structure described in Figure 8 can prevent the energy radiated by the antenna from coupling to the nonlinear device and cause the nonlinear device to generate higher harmonics, which are conducted to the antenna and then emitted together with the radio frequency signal; Therefore, using the nonlinear component can improve the radiation spurious situation and improve the radiation performance of the antenna.

The embodiment of the present application also provides another terminal device, as shown in FIG. 9 , which is a schematic structural diagram of another terminal device disclosed in the implementation of the present application. For ease of description, only the parts related to the embodiment of the present application are shown. The terminal device can be any terminal device such as mobile phone, tablet computer, PDA (Personal Digital Assistant), POS (Point of Sales, sales terminal), vehicle-mounted computer, etc. Taking the terminal device as a mobile phone as an example:

FIG. 9 shows a block diagram of a partial structure of a mobile phone related to the terminal device provided by the embodiment of the present application. Referring to FIG. 9 , the mobile phone includes: a radio frequency (Radio Frequency, RF) circuit 910 , a memory 920 , a processor 930 , and a power supply 940 and other components. Those skilled in the art can understand that the structure of the mobile phone shown in FIG. 8 does not constitute a limitation to the mobile phone, and may include more or less components than shown in the figure, or combine some components, or arrange different components.

The following is a specific introduction to each component of the mobile phone in conjunction with Figure 9:

RF circuitry 910 may be used for the reception and transmission of information. Generally, the RF circuit 910 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier (Low Noise Amplifier, LNA), a duplexer, and the like. In addition, RF circuitry 910 may also communicate with networks and other devices via wireless communications. The above-mentioned wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile Communication (Global System of Mobile communication, GSM), General Packet Radio Service (General Packet Radio Service, GPRS), Code Division Multiple Access (Code Division Multiple Access) Access, CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (Long Term Evolution, LTE), email, Short Messaging Service (Short Messaging Service, SMS), etc. The radio frequency circuit 810 in the embodiment of the present application implements amplification and transmission of multiple carrier signals of different frequencies through one amplifier, which can save the number of power amplifiers used and material costs during carrier aggregation.

The memory 920 can be used to store software programs and modules, and the processor 930 executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory 920 . The memory 920 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function, etc.; the data storage area may store data created according to the use of the mobile phone, etc. In addition, the memory 920 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 930 is the control center of the mobile phone. It uses various interfaces and lines to connect various parts of the entire mobile phone. By running or executing software programs and/or modules stored in the memory 920, and calling data stored in the memory 920, execution Various functions and processing data of the mobile phone, so as to monitor the mobile phone as a whole. Optionally, the processor 930 may include one or more processing units; preferably, the processor 930 may integrate an application processor and a modem processor, wherein the application processor mainly processes operating systems, user interfaces, and application programs, etc. , the modem processor mainly handles wireless communications. It can be understood that the foregoing modem processor may not be integrated into the processor 930 .

The mobile phone also includes a power supply 940 (such as a battery) for supplying power to each component. Preferably, the power supply can be logically connected to the processor 930 through the power management system, so that functions such as charging, discharging, and power consumption management can be realized through the power management system.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or can be Integrate into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

The embodiments of the present application have been introduced in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present application. The descriptions of the above embodiments are only used to help understand the core idea of the present application; meanwhile, for those in the art Ordinary technicians, based on the idea of this application, will have changes in specific implementation methods and application ranges. In summary, the content of this specification should not be construed as limiting this application.

Claims (20)

1. A nonlinear component, characterized in that, the nonlinear component is applied to a terminal device with an antenna, and the nonlinear component is located in the clearance area of the antenna; the nonlinear component includes a nonlinear device and a filter device , the nonlinear device is connected to the filter device; the filter device is used to prevent energy radiated by the antenna from being coupled to the nonlinear device and cause the nonlinear device to generate higher harmonics. 2. The nonlinear component according to claim 1, wherein the nonlinear device includes a power supply pin and a clock pin; the filter device includes: a first capacitor and a second capacitor, wherein the first A capacitor includes a first end and a second end, and the second capacitor includes a first end and a second end; The nonlinear device is connected to the filter device, including: The power supply pin is connected to the first end of the first capacitor, and the second end of the first capacitor is grounded; and the clock pin is connected to the first end of the second capacitor, and the second capacitor The second end of the ground. 3. The nonlinear component according to claim 2, wherein the nonlinear device further comprises an enable pin; the filter device further comprises a third capacitor, and the third capacitor comprises a first terminal and a first terminal Two ends; The nonlinear device is connected to the filter device, and further includes: The enabling pin is connected to the first terminal of the third capacitor, and the second terminal of the third capacitor is grounded. 4. The nonlinear component according to claim 1, wherein the nonlinear device includes a power pin and a clock pin; the filter device includes: a first inductor and a second inductor; The nonlinear device is connected to the filter device, including: The power supply pin is connected to the first inductor, and the clock pin is connected to the second inductor. 5. The nonlinear assembly according to claim 4, wherein the nonlinear device further comprises an enable pin; the filter device further comprises a third inductor; The nonlinear device is connected to the filter device, and further includes: The enabling pin is connected to the third inductor. 6. The nonlinear component according to claim 1, wherein the nonlinear device includes a power supply pin and a clock pin; the filter device includes: a first RLC parallel resonant circuit and a second RLC parallel resonant circuit , wherein the first RLC parallel resonant circuit includes an input end and an output end, and the second RLC parallel resonant circuit includes an input end and an output end; The nonlinear device is connected to the filter device, including: The power supply pin is connected to the input end of the first RLC parallel resonant circuit, and the output end of the first RLC parallel resonant circuit is grounded; and the clock pin is connected to the input end of the second RLC parallel resonant circuit , the output end of the second RLC parallel resonant circuit is grounded. 7. The non-linear component according to claim 6, wherein the non-linear device also includes an enabling pin; the filter device also includes a third RLC parallel resonant circuit, and the third RLC parallel resonant circuit Including input and output; The nonlinear device is connected to the filter device, and further includes: The enable pin is connected to the input terminal of the third RLC parallel resonant circuit, and the output terminal of the third RLC parallel resonant circuit is grounded. 8. The nonlinear component according to claim 1, wherein the nonlinear device includes a power supply pin and a clock pin; the filter device includes: a first RLC series resonant circuit and a second RLC series resonant circuit ; The nonlinear device is connected to the filter device, including: The power supply pin is connected to the first RLC series resonant circuit, and the clock pin is connected to the second RLC series resonant circuit. 9. The non-linear assembly according to claim 8, wherein the non-linear device also includes an enable pin; the filter device also includes a third RLC series resonant circuit; The nonlinear device is connected to the filter device, and further includes: The enabling pin is connected to the third RLC series resonant circuit. 10. The nonlinear component according to any one of claims 1 to 9, wherein, when the antenna outputs a radio frequency signal of the Global System for Communications GSM900 frequency band, the filter device is used to prevent the nonlinear The device generates higher harmonics at a frequency of 2700MHz. 11. A circuit board structure, characterized in that the circuit board structure comprises a main board and the nonlinear component according to any one of claims 1-10. 12 . The circuit board structure according to claim 11 , wherein the circuit board structure further comprises a flexible circuit board (FPC), and the FPC is used for connecting the main board and the nonlinear component. 13 . 13. The circuit board structure according to claim 12, wherein the FPC is located in a clear area of the antenna. 14. The circuit board structure according to claim 13, characterized in that, when the FPC is located in the clearance area of the antenna, the filter device in the nonlinear assembly is located at the connection between the FPC and the main board or, the filter device is located at the connection between the FPC and the nonlinear device; or, the filter device is located in the middle of the FPC. 15. A terminal device, characterized in that the terminal device comprises an antenna, the nonlinear device according to any one of claims 1-10, and the filter device according to any one of claims 1-10. 16. The terminal device according to claim 15, characterized in that, the terminal device further comprises a flexible circuit board (FPC) and a main board; the FPC is used to connect the nonlinear device and the main board; the FPC is located in the Clearance area of the above antenna. 17. The terminal device according to claim 16, wherein the filter device is located at the connection between the FPC and the main board; or, the filter device is located at the connection between the FPC and the nonlinear device or, the filter device is located in the middle of the FPC. 18. The terminal device according to any one of claims 15-17, characterized in that the terminal device further comprises a rear cover, and the antenna is disposed on an inner surface of the rear cover. 19. The terminal device according to claim 18, wherein a plurality of slits are formed in the rear cover corresponding to the position of the antenna to form a clearance area of the antenna. 20. The terminal device according to claim 19, wherein the plurality of slits are parallel to each other, and an insulating material is filled between two adjacent slits.