Electromagnetic radiation elimination method and elimination device, electronic equipment

Abstract

The present invention provides a method and device for eliminating electromagnetic radiation, and an electronic device. The method for eliminating electromagnetic radiation includes: detecting a first noise frequency band of electromagnetic radiation noise in a noise reduction area in an electronic device, obtaining a noise reduction device that matches the impedance of the first noise frequency band; arranging the noise reduction device in the noise reduction area, and absorbing the electromagnetic radiation noise based on the noise reduction antenna in the noise reduction device. The method for eliminating electromagnetic radiation provided by the present invention can eliminate the electromagnetic radiation noise in the noise reduction area in a targeted manner, thereby helping to improve the effectiveness of eliminating electromagnetic radiation noise.

Description

Technical Field

[0001] The present invention relates to the technical field of noise reduction, and in particular to a method and device for eliminating electromagnetic radiation, and electronic equipment. Background Art

[0002] As technology develops, electronic equipment becomes smaller and smaller, and the requirements for noise control inside products become more and more stringent.

[0003] Since electronic equipment generates electromagnetic radiation noise during operation, which can easily cause electronic equipment to malfunction, how to reduce electromagnetic radiation noise and optimize the electromagnetic noise environment inside electronic equipment has become an urgent problem to be solved.

[0004] In the related art, the method of increasing the number of wiring layers in the motherboard layout is adopted to guide the direction of the noise signal, thereby reducing the electromagnetic radiation caused by the high-speed signal of the motherboard, and the purpose of reducing the electromagnetic radiation noise is achieved by adding a filter circuit design. However, this method is only suitable for board-level noise, has a small range of action, and has high requirements for designers. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the prior art cannot effectively reduce electromagnetic radiation noise, thereby providing a method and device for eliminating electromagnetic radiation, and an electronic device.

[0006] According to a first aspect, an embodiment of the present invention provides a method for eliminating electromagnetic radiation, the method comprising:

[0007] Detecting a first noise frequency band of electromagnetic radiation noise in a region to be reduced in the electronic device;

[0008] Acquire a noise reduction device having impedance matching with the first noise frequency band;

[0009] The noise reduction device is arranged in the area to be noise reduced, and the electromagnetic radiation noise is absorbed based on the noise reduction antenna in the noise reduction device.

[0010] In this embodiment, the electromagnetic radiation noise in the area to be reduced can be eliminated in a targeted manner, thereby helping to improve the effectiveness of eliminating the electromagnetic radiation noise.

[0011] In combination with the first aspect, in a first embodiment of the first aspect, the absorbing the electromagnetic radiation noise based on the noise reduction antenna in the noise reduction device includes:

[0012] Converting the electromagnetic radiation noise into an induced current through a noise reduction antenna in the noise reduction device;

[0013] The induced current is converted into heat energy through the resistor in the noise reduction device to absorb the electromagnetic radiation noise;

[0014] The resistor is connected to a first end of a core wire of a coaxial cable in the noise reduction antenna, and a second end of the core wire is connected to a feeding point of an antenna radiator of the noise reduction antenna.

[0015] In combination with the first aspect or the first embodiment of the first aspect, in a second embodiment of the first aspect, the step of arranging the noise reduction device in the area to be noise reduced includes:

[0016] Fixing the noise reduction device to the area to be noise reduced by means of screws in the noise reduction device;

[0017] The planar area of ​​the screw head is arranged on the lower surface of the shell of the coaxial cable in the noise reduction antenna, and the planar area of ​​the screw head is used as a reflector of the noise reduction antenna, and the coaxial cable includes a core wire passing through the shell.

[0018] In combination with the second embodiment of the first aspect, in a third embodiment of the first aspect, the method further includes:

[0019] Determining a target head diameter corresponding to the first noise frequency band according to a preset correspondence between the noise frequency band and the screw head diameter;

[0020] A screw having the target head diameter is determined.

[0021] In combination with the first embodiment of the first aspect, in a fourth embodiment of the first aspect, a noise reduction device that matches the impedance of the first noise frequency band is obtained, including:

[0022] Determining a feeding point at which the noise reduction antenna matches the impedance of the first noise frequency band;

[0023] Fixing the second end of the coaxial cable core wire on the feeding point to obtain a noise reduction antenna with impedance matching the first noise frequency band;

[0024] A noise reduction device including the noise reduction antenna is obtained.

[0025] In combination with the fourth embodiment of the first aspect, in a fifth embodiment of the first aspect, determining a feeding point at which the noise reduction antenna matches the impedance of the first noise frequency band includes:

[0026] Based on the wavelength of the first noise frequency band, power detection is performed by an antenna tuner to determine the debugging length of the noise reduction antenna;

[0027] The feeding point is determined according to the debugging length of the noise reduction antenna.

[0028] In combination with the first aspect, in a sixth embodiment of the first aspect, the method further includes:

[0029] Detecting a second noise frequency band in the area to be noise reduced;

[0030] If the second noise frequency band is greater than the designated noise frequency band, a noise reduction antenna for absorbing the electromagnetic radiation noise is re-determined based on the second noise frequency band.

[0031] In combination with the first aspect, in a seventh embodiment of the first aspect, the method further includes:

[0032] The noise frequency band of each area in the electronic device is detected, and an area whose noise frequency band is greater than a specified noise frequency band is determined as an area to be noise reduced.

[0033] According to a second aspect, an embodiment of the present invention further provides a device for eliminating electromagnetic radiation, the device comprising:

[0034] A noise reduction antenna, comprising an antenna radiator and a coaxial cable, wherein the coaxial cable comprises a shell and a core wire running through the shell, wherein the second end of the core wire is connected to a feeding point of the antenna radiator, and the first end of the core wire is connected to a resistor, and the noise reduction antenna is used to absorb electromagnetic radiation noise in a noise frequency band of a first noise frequency band in a noise reduction area in an electronic device;

[0035] A screw, the head plane area of ​​which is arranged on the lower surface of the housing of the coaxial cable in the noise reduction antenna, and is used to serve as a reflector for the noise reduction antenna and to fix the noise reduction antenna to the area to be noise reduced in the electronic device;

[0036] The resistor is connected to the first end of the feeder in the noise reduction antenna, and is used to convert the induced current generated by the electromagnetic radiation noise through the noise reduction antenna into heat energy.

[0037] In this way, the deployment of noise reduction antennas can be made more flexible and convenient without occupying or compressing the internal space of electronic equipment, and the setting position can be flexibly adjusted according to noise reduction requirements.

[0038] In combination with the second aspect, in a first embodiment of the second aspect, the noise reduction antenna is a helical antenna.

[0039] According to a third aspect, an embodiment of the present invention further provides an electronic device, comprising the device for eliminating electromagnetic radiation according to the second aspect and any one of its optional embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 It is a schematic structural diagram of a device for eliminating electromagnetic radiation according to an exemplary embodiment.

[0042] Figure 2 It is a schematic structural diagram of a screw proposed according to an exemplary embodiment.

[0043] Figure 3 The invention is a flow chart of a method for eliminating electromagnetic radiation according to an exemplary embodiment.

[0044] Figure 4 is a flow chart of another method for eliminating electromagnetic radiation according to an exemplary embodiment.

[0045] Figure 5 is a flow chart of yet another method for eliminating electromagnetic radiation according to an exemplary embodiment.

[0046] Figure 6 It is a schematic diagram of the hardware structure of an electronic device proposed according to an exemplary embodiment. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the related art, the method of increasing the number of wiring layers in the motherboard layout is adopted to guide the direction of the noise signal, thereby reducing the electromagnetic radiation caused by the high-speed signal of the motherboard, and the purpose of reducing the electromagnetic radiation noise is achieved by adding a filter circuit design. However, this method is only suitable for board-level noise, has a small range of action, and has high requirements for designers.

[0049] When this method is used to reduce electromagnetic radiation noise, it is difficult to reduce the electromagnetic radiation noise near the key parts (Key Part, KP), which also affects the noise reduction effect inside the electronic device. KP can be a central processing unit (CPU), a solid state disk (Solid State Disk or Solid State Drive, SSD) or an adapter, etc., which is not limited in the invention.

[0050] To solve the above problems, a method for eliminating electromagnetic radiation is provided in an embodiment of the present invention, which is used in an electronic device, wherein the electronic device can be a terminal or a client or a server, the server can be a single server or a server cluster composed of multiple servers, and the terminal in the embodiment of the present application can be a smart phone, a personal computer, a tablet computer, a wearable device, and other smart hardware devices such as an intelligent robot.

[0051] In the electronic device of this embodiment, at least one electromagnetic radiation elimination device is deployed to eliminate electromagnetic radiation noise inside the electronic device to optimize the internal electromagnetic environment of the electronic device and further reduce the external electromagnetic radiation energy of the electronic device.

[0052] Figure 1 FIG. 1 is a schematic diagram of a device for eliminating electromagnetic radiation according to an exemplary embodiment. Figure 1 As shown, the device for eliminating electromagnetic radiation includes a noise reduction antenna 10 , a screw 20 and a resistor 30 .

[0053] The noise reduction antenna 10 includes an antenna radiator 11 and a coaxial cable 12. The coaxial cable includes a shell 121 and a core wire 122 running through the shell. The second end of the core wire 122 is connected to the feeding point A of the antenna radiator 11. The first end of the core wire 122 is connected to the resistor 30. The noise reduction antenna 10 is used to absorb electromagnetic radiation noise in a noise frequency band of a first noise frequency band in a noise reduction area in an electronic device.

[0054] In the embodiment of the present invention, the noise reduction antenna 10 may be a passive antenna, a high-gain antenna, or a passive antenna with a high-gain characteristic.

[0055] In one example, since the helical antenna can transmit and receive polarized electromagnetic signals rotating in space, the helical antenna can be preferably used as a noise reduction antenna to eliminate electromagnetic radiation noise. In addition, since the helical antenna is small in size, when it is deployed inside an electronic device, the space gaps between components can be fully utilized, thereby saving space.

[0056] In another example, different noise reduction antennas are used to absorb electronic radiation noise in different noise frequency bands, so that when eliminating electromagnetic radiation noise, targeted elimination can be performed, which helps to improve the noise reduction effect and achieve effective elimination of electromagnetic radiation.

[0057] In one embodiment, when the same noise reduction antenna absorbs electromagnetic radiation noise in different noise frequency bands, it corresponds to different feeding points A. The feeding point A can be determined by an antenna tuner. The antenna tuner performs power detection to determine the debugging length of the noise reduction antenna 10 that can provide the antenna gain covering the first noise frequency band, and then the point position corresponding to the debugging length is used as the feeding point A that matches the impedance of the first noise frequency band.

[0058] The screw 20 has a head plane area disposed on the lower surface of the housing 121 and is used as a reflector for the noise reduction antenna 10 and to fix the noise reduction antenna 10 in the area to be noise reduced in the electronic device.

[0059] In the embodiment of the present invention, the screw 20 can be understood as a fixing component used to fix the noise reduction antenna 10 to the area to be reduced in the electronic device. During the installation process, the noise reduction antenna 10 is fixed above the screw 20, so that the head plane area of ​​the screw 20 serves as a reflector of the noise reduction antenna 10, providing the noise reduction antenna 10 with a ground (GDN) signal, thereby helping to improve the receiving sensitivity of the antenna signal and enhance the receiving ability of the noise reduction antenna 10 to absorb electromagnetic radiation noise. In one example, a flat head screw can be preferred.

[0060] In one embodiment, if Figure 2 As shown, the screw 20 includes a head plane area 21 and a rod 22. The rod 22 of the screw is used to be introduced into the screw hole of the area to be reduced noise, so as to fix the noise reduction antenna 10 in the area to be reduced noise in the electronic device.

[0061] The resistor 30 is used to convert the electromagnetic radiation noise into heat energy through the induced current generated by the noise reduction antenna 10, thereby achieving the purpose of absorbing the electromagnetic radiation noise. The value of the resistor 30 depends on the magnitude of the induced current. The larger the induced current, the larger the resistance value. Conversely, the smaller the induced current, the smaller the resistance value. In one example, the value range of the resistor 30 can be a value in the order of hundreds, thousands or higher.

[0062] Through the above embodiments, the deployment method of the noise reduction antenna can be made more flexible and convenient without occupying or compressing the internal space of the electronic device, and the setting position can be flexibly adjusted according to the noise reduction requirements.

[0063] In one implementation scenario, the antenna tuner may be connected between the core line 122 and the resistor 30 , and the position of the feeding point A may be adjusted based on the actual noise frequency band of the electromagnetic radiation noise, thereby improving the effectiveness of eliminating the electromagnetic radiation noise.

[0064] Based on the same inventive concept, the present invention provides a method for eliminating electromagnetic radiation. Through the method for eliminating electromagnetic radiation provided by the present invention, a noise reduction antenna with impedance matching with the first noise frequency band can be set according to the first noise frequency band of the electromagnetic radiation noise in the area to be reduced in the electronic device, and then the electromagnetic radiation noise in the first noise frequency band can be eliminated in a targeted manner, thereby helping to improve the effectiveness of eliminating electromagnetic radiation noise.

[0065] Figure 3 FIG. 1 is a flow chart of a method for eliminating electromagnetic radiation according to an exemplary embodiment. Figure 3 As shown, the method for eliminating electromagnetic radiation includes the following steps S301 to S303.

[0066] In step S301, a first noise frequency band of electromagnetic radiation noise in a region to be reduced in an electronic device is detected.

[0067] In the embodiment of the present invention, the area to be de-noised can be understood as an area where electromagnetic radiation noise is determined to exist. In order to specifically eliminate the electromagnetic radiation noise in the area to be de-noised, the noise frequency band of the electromagnetic radiation noise is detected to obtain a first noise frequency band.

[0068] In step S302, a noise reduction device having impedance matching with a first noise frequency band is obtained.

[0069] In the embodiment of the present invention, in order to eliminate the electromagnetic radiation noise, a noise reduction device with impedance matching the first noise frequency band is obtained, so that the electromagnetic radiation noise in the first noise frequency band can be eliminated by using the noise reduction antenna in the noise reduction device.

[0070] In one embodiment, the noise reduction antenna may be a helical antenna.

[0071] In step S303, a noise reduction device is disposed in the area to be noise reduced, and the noise reduction antenna in the noise reduction device absorbs electromagnetic radiation noise.

[0072] In one embodiment, the noise reduction antenna can be fixedly set in the area to be noise reduced by screws. Specifically, the noise reduction antenna is fixed on the head plane area of ​​the screw, for example: the head plane area of ​​the screw is set on the lower surface of the shell of the coaxial cable in the noise reduction antenna, so that the head plane area of ​​the screw is used as a reflector of the noise reduction antenna to provide a GDN signal for the noise reduction antenna. The noise reduction antenna is fixedly set in the area to be noise reduced by screws, which helps to flexibly adjust the position according to the noise reduction requirements. Among them, the coaxial cable includes a core wire that runs through the shell.

[0073] In another embodiment, the noise reduction device includes but is not limited to a noise reduction antenna, a screw and a resistor. The specific process of absorbing electromagnetic radiation noise based on the noise reduction antenna in the noise reduction device may include: converting the electromagnetic radiation noise into an induced current through the noise reduction antenna in the noise reduction device, and then converting the induced current into heat energy through a resistor in the noise reduction device connected to the first end of the core wire of the coaxial cable in the noise reduction antenna, so as to reduce the external radiation of the internal system of the electronic device by energy conversion, thereby achieving effective absorption of electromagnetic radiation noise and optimizing the internal electromagnetic environment of the electronic device. The second end of the core wire is connected to the feeding point of the antenna radiator of the noise reduction antenna.

[0074] Through the above embodiments, the electromagnetic radiation noise in the area to be reduced can be eliminated in a targeted manner, thereby helping to improve the effectiveness of eliminating the electromagnetic radiation noise.

[0075] In one embodiment, the size of the reflector of the noise reduction antenna affects the ability of the noise reduction antenna to absorb electromagnetic radiation noise. In order to make the antenna gain of the noise reduction antenna meet the requirement of eliminating electromagnetic radiation noise in the first noise frequency band, according to the preset correspondence between the noise frequency band and the screw head diameter, the target head diameter corresponding to the first noise frequency band is determined, and then the screw with the target head diameter is used as the screw for fixing the noise reduction antenna, which helps to improve the effectiveness of eliminating electromagnetic radiation noise.

[0076] In one example, in order to quickly obtain screws, screws with different head diameters can be manufactured in advance for different noise frequency bands based on the preset correspondence between the noise frequency band and the screw head diameter. Then, when the noise frequency band of the electromagnetic radiation noise in the area to be reduced is determined, the corresponding screws can be used to fix the noise reduction antenna in the corresponding area to be reduced.

[0077] In another embodiment, in order to eliminate electromagnetic radiation noise, a feeding point of the noise reduction antenna that matches the impedance of the first noise frequency band is predetermined, and then the second end of the coaxial cable core wire is fixed on the feeding point to obtain a noise reduction antenna that matches the impedance of the first noise frequency band, so as to obtain a noise reduction device including the noise reduction antenna to eliminate electromagnetic radiation noise whose noise frequency band is the first noise frequency band, so as to improve the effectiveness of eliminating electromagnetic radiation noise. In one example, the feeding point can be based on the wavelength of the first noise frequency band, and the power detection is performed by the antenna tuner to determine the debugging length of the noise reduction antenna, and then it is determined according to the debugging length of the noise reduction antenna. The feeding points corresponding to different noise frequency bands may be different.

[0078] In another embodiment, since the noise reduction antenna can be fixed to the area to be noise reduced by screws, the fixing position can be adjusted according to the actual noise reduction requirements when fixing the noise reduction antenna, so that the fixing process is more flexible and more conducive to deployment in electronic devices. In one example, if there is no screw hole in the area to be noise reduced, the noise reduction antenna can be fixed to the screw hole closest to the area to be noise reduced, or a screw hole can be added in the area to be noise reduced.

[0079] Figure 4 FIG. 1 is a flow chart of another method for eliminating electromagnetic radiation according to an exemplary embodiment. Figure 4 As shown, the method for eliminating electromagnetic radiation includes the following steps.

[0080] In step S401, a first noise frequency band of electromagnetic radiation noise in a region to be reduced in an electronic device is detected.

[0081] In step S402, a noise reduction device having impedance matching with a first noise frequency band is obtained.

[0082] In step S403, a noise reduction device is disposed in the area to be noise reduced, and the noise reduction antenna in the noise reduction device absorbs electromagnetic radiation noise.

[0083] In step S404, a second noise frequency band of the area to be noise reduced is detected.

[0084] In the embodiment of the present invention, in order to determine whether the noise reduction device is effective in absorbing electromagnetic radiation noise, the second noise frequency band of the area to be reduced is detected to determine whether electromagnetic radiation noise still exists in the area to be reduced.

[0085] In step S405, if the second noise frequency band is greater than the designated noise frequency band, a noise reduction device for absorbing electromagnetic radiation noise is re-determined based on the second noise frequency band.

[0086] In the embodiment of the present invention, if the second noise frequency band is greater than the specified noise frequency band, it indicates that there is uneliminated electromagnetic radiation noise in the area to be reduced noise. To improve the effectiveness of eliminating electromagnetic radiation noise, the noise reduction device for absorbing electromagnetic radiation noise is re-determined based on the second noise frequency band.

[0087] In one example, the feeding point of the noise reduction antenna can be re-determined based on the second noise frequency band, and then the second end of the coaxial cable core wire is fixed to the re-determined feeding point, so that the purpose of rapid elimination can be achieved without adding a noise reduction device. The specified noise frequency band can be understood as a noise frequency band with no electromagnetic radiation noise by default.

[0088] In one embodiment, if the second noise frequency band is less than or equal to the specified noise frequency band, it indicates that the electromagnetic radiation noise in the area to be reduced has been eliminated, and the noise reduction device can effectively absorb the magnetic radiation noise in the first noise frequency band.

[0089] Through the above embodiments, after the noise reduction device is set up, the installation effectiveness of the noise reduction device can be determined by detecting the noise frequency band of the area to be reduced. Furthermore, when the set noise reduction device cannot eliminate the electromagnetic radiation noise in the area to be reduced, the noise reduction device to be deployed can be re-determined, which helps to improve the effectiveness of eliminating electromagnetic radiation noise.

[0090] Figure 5 FIG. 1 is a flow chart of another method for eliminating electromagnetic radiation according to an exemplary embodiment. Figure 5 As shown, the method for eliminating electromagnetic radiation includes the following steps.

[0091] In step S501, the noise frequency bands of various regions in the electronic device are detected, and the regions with noise frequency bands greater than the specified noise frequency band are determined as regions to be subjected to noise reduction.

[0092] In the embodiment of the present invention, the number of the areas to be denoised may be greater than or equal to 1, and may be determined based on whether the noise frequency band of each area is greater than a specified noise frequency band.

[0093] In step S502, a first noise frequency band of electromagnetic radiation noise in a region to be reduced in the electronic device is detected.

[0094] In step S503, a noise reduction device having impedance matching with the first noise frequency band is obtained.

[0095] In step S504, a noise reduction device is disposed in the area to be noise reduced, and the noise reduction antenna in the noise reduction device absorbs electromagnetic radiation noise.

[0096] Through the above embodiments, the noise reduction device is deployed according to the areas to be noise reduced that actually need to be noise reduced in the electronic device, which can meet the noise reduction needs of each area, and thus can greatly optimize the electromagnetic noise environment inside the electronic device, thereby effectively reducing the external radiation of electromagnetic radiation noise.

[0097] Based on the same inventive concept, the present invention also provides an electronic device. The electronic device may include the electromagnetic radiation elimination device provided by the present invention. The number of electromagnetic radiation elimination devices may be unlimited and may be set according to actual noise reduction requirements.

[0098] Figure 6 FIG. 1 is a schematic diagram of a hardware structure of an electronic device according to an exemplary embodiment. Figure 6As shown, the device includes one or more processors 610 and a memory 620, and the memory 620 includes a persistent memory, a volatile memory, and a hard disk. Figure 6 A processor 610 is taken as an example. The device may further include: an input device 630 and an output device 640.

[0099] The processor 610, the memory 620, the input device 630 and the output device 640 may be connected via a bus or other means. Figure 6 The example of connecting through bus is taken in the following.

[0100] The processor 610 may be a central processing unit (CPU). The processor 610 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips. A general-purpose processor may be a microprocessor or the processor may be any conventional processor.

[0101] The memory 620 is a non-transient computer-readable storage medium, including a persistent memory, a volatile memory, and a hard disk, and can be used to store non-transient software programs, non-transient computer executable programs, and modules, such as program instructions / modules corresponding to the business management method in the embodiment of the present application. The processor 610 executes various functional applications and data processing of the server by running the non-transient software programs, instructions, and modules stored in the memory 620.

[0102] The memory 620 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data required for use, etc. In addition, the memory 620 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 620 may optionally include a memory remotely arranged relative to the processor 610, and these remote memories may be connected to the data processing device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0103] The input device 630 can receive input digital or character information and generate key signal input related to user settings and function control. The output device 640 can include display devices such as a display screen.

[0104] The above-mentioned product may deploy at least one electromagnetic radiation elimination device provided by the embodiment of the present invention to eliminate the electromagnetic radiation noise generated by the electronic device during use, so as to optimize the internal electromagnetic environment of the electronic device. For technical details not described in detail in this embodiment, please refer to Figure 1-Figure 5 Related description of the illustrated embodiment.

[0105] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for eliminating electromagnetic radiation, characterized in that: The method comprises: Detecting a first noise frequency band of electromagnetic radiation noise in a region to be reduced in the electronic device; Acquire a noise reduction device having impedance matching with the first noise frequency band; The noise reduction device is arranged in the area to be noise reduced, and the electromagnetic radiation noise is absorbed based on the noise reduction antenna in the noise reduction device, including: converting the electromagnetic radiation noise into an induced current through the noise reduction antenna in the noise reduction device; converting the induced current into heat energy through a resistor in the noise reduction device to complete the absorption of the electromagnetic radiation noise; wherein the resistor is connected to the first end of the core wire of the coaxial cable in the noise reduction antenna, and the second end of the core wire is connected to the feeding point of the antenna radiator of the noise reduction antenna; The step of arranging the noise reduction device in the area to be noise reduced comprises: fixing the noise reduction device in the area to be noise reduced by means of screws in the noise reduction device; wherein the head plane area of ​​the screw is arranged on the lower surface of the shell of the coaxial cable in the noise reduction antenna, the head plane area of ​​the screw is used as a reflector of the noise reduction antenna, and the coaxial cable comprises a core wire penetrating the shell; Determining a target head diameter corresponding to the first noise frequency band according to a preset correspondence between the noise frequency band and the screw head diameter; A screw having the target head diameter is determined.

2. The method according to claim 1, characterized in that: The step of obtaining a noise reduction device that matches the impedance of the first noise frequency band includes: Determining a feeding point at which the noise reduction antenna matches the impedance of the first noise frequency band; Fixing the second end of the coaxial cable core wire on the feeding point to obtain a noise reduction antenna with impedance matching the first noise frequency band; A noise reduction device including the noise reduction antenna is obtained.

3. The method according to claim 2, characterized in that The step of determining a feeding point at which the noise reduction antenna matches the impedance of the first noise frequency band comprises: Based on the wavelength of the first noise frequency band, power detection is performed by an antenna tuner to determine the debugging length of the noise reduction antenna; The feeding point is determined according to the debugging length of the noise reduction antenna.

4. The method according to claim 1, characterized in that: The method further comprises: Detecting a second noise frequency band in the area to be noise reduced; If the second noise frequency band is greater than the designated noise frequency band, a noise reduction device for absorbing the electromagnetic radiation noise is re-determined based on the second noise frequency band.

5. The method according to claim 1, characterized in that The method further comprises: The noise frequency band of each area in the electronic device is detected, and an area whose noise frequency band is greater than a specified noise frequency band is determined as an area to be noise reduced.

6. A device for eliminating electromagnetic radiation, characterized in that: The elimination device comprises: A noise reduction antenna, comprising an antenna radiator and a coaxial cable, wherein the coaxial cable comprises a shell and a core wire running through the shell, wherein the second end of the core wire is connected to a feeding point of the antenna radiator, and the first end of the core wire is connected to a resistor, and the noise reduction antenna is used to absorb electromagnetic radiation noise in a noise frequency band of a first noise frequency band in a noise reduction area in an electronic device; A screw, the head plane area of ​​which is arranged on the lower surface of the housing of the coaxial cable in the noise reduction antenna, and is used to serve as a reflector for the noise reduction antenna and to fix the noise reduction antenna to the area to be noise reduced in the electronic device; The resistor is used to convert the induced current generated by the electromagnetic radiation noise through the noise reduction antenna into heat energy.

7. The elimination device according to claim 6, characterized in that: The noise reduction antenna is a helical antenna.

8. An electronic device, characterized in that: A device for eliminating electromagnetic radiation comprising any one of claims 6-7.

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