WO2023160151A1

WO2023160151A1 - Adjustment method for specific absorption ratio, and antenna apparatus, terminal device and storage medium

Info

Publication number: WO2023160151A1
Application number: PCT/CN2022/139377
Authority: WO
Inventors: 彭博
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-02-24
Filing date: 2022-12-15
Publication date: 2023-08-31
Also published as: CN114513840A

Abstract

Disclosed in the present application are an adjustment method for a specific absorption ratio, and an antenna apparatus, a terminal device and a storage medium. The adjustment method comprises: acquiring an average specific absorption ratio of any radiation point in a radiation pattern; and when it is detected that the average specific absorption ratio of any radiation point is greater than or equal to a preset threshold value, controlling an antenna tuner 110 to switch a working mode. Therefore, the radiation pattern of an antenna is adjusted, so as to change the position of the radiation point with the highest specific absorption ratio in the radiation pattern, such that the specific absorption ratio of the any radiation point is reduced, thereby reducing the average specific absorption ratio of the any radiation point; and the average specific absorption ratio can be controlled to be less than a standard value without reducing the radio-frequency power of a terminal device 300, thereby improving the communication performance of the terminal device 300 while reducing an SAR value.

Description

Method for adjusting specific absorption rate, antenna device, terminal equipment and storage medium

This application claims the priority of the Chinese patent application with the application number 202210176521.7 and the title of the invention "Adjustment method of specific absorption rate, antenna device, terminal equipment and storage medium" filed in China Patent Office on February 24, 2022, The entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the technical field of wireless communication, and in particular to a method for adjusting a specific absorption rate, an antenna device, a terminal device, and a storage medium.

Background technique

The statements herein merely provide background information related to the present application and may not necessarily constitute prior art. Under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are lossy media, the electromagnetic field in the body will generate current to absorb and dissipate electromagnetic energy.

SAR (Specific Absorption Ratio, Specific Absorption Ratio) refers to the electromagnetic radiation energy absorbed by a unit mass of material per unit time. It is an internationally used indicator for evaluating the impact of radio waves on the human body. It is closely monitored by communication regulatory agencies in various regions of the world. At present, the two mainstream standard values are 1.6W/kg stipulated by the US Federal Communications Commission (FCC) and 2.0W/kg stipulated by the European Union.

The current terminal equipment usually controls the SAR value to be smaller than the standard value by limiting the radio frequency power, or reduces the radio frequency power of the terminal equipment when the SAR value exceeds the standard value, and the reduction of the radio frequency power may easily lead to a decrease in the communication performance of the terminal equipment, thus affecting the terminal equipment call quality or network quality. Therefore, how to improve the communication performance of the terminal device while reducing the SAR value has become an urgent problem to be solved at present.

application content

The purpose of the embodiments of the present application is to provide a method for adjusting SAR, an antenna device, a terminal device, and a storage medium, including but not limited to solving the problem that the communication performance of the terminal device decreases due to the reduction of the SAR value of the existing terminal device.

The technical scheme that the embodiment of the present application adopts is:

In the first aspect, a method for adjusting the specific absorption rate is provided, including:

Obtaining the average specific absorption rate of any radiation point in the radiation field, wherein the average specific absorption rate represents the average value of the specific absorption rate within a preset period, and the average specific absorption rate is reset to zero every time a preset period passes ;

When the average specific absorption rate of any radiation point in the radiation field is greater than or equal to a preset threshold, control the antenna tuner to switch to the first working mode, so as to reduce the specific absorption rate of any radiation point;

Wherein, the antenna tuner includes at least two working modes, and when the antenna tuner is switched to a different working mode, the antenna is excited to transmit communication signals in different radiation patterns.

The first aspect of the embodiments of the present application provides a specific absorption rate adjustment method, by obtaining the average specific absorption rate of any radiation point in the radiation field shape, and detecting that the average specific absorption rate of any radiation point is greater than or equal to the predetermined When the threshold is set, the antenna tuner is controlled to switch the working mode, thereby adjusting the radiation field shape of the antenna to change the position of the radiation point with the highest specific absorption rate in the radiation field shape, so that the specific absorption rate of any of the above radiation points is reduced, thereby reducing The average specific absorption rate of any of the above radiation points can be controlled to be smaller than the standard value without reducing the radio frequency power of the terminal device, thereby improving the communication performance of the terminal device while reducing the SAR value.

In a second aspect, an antenna device is provided, including an antenna tuner, a radiator, a memory, a processor connected in sequence, and a computer program stored in the memory and operable on the processor;

The memory, the processor, the antenna tuner and the radiator are sequentially connected;

The antenna tuner is used to excite the radiator to emit communication signals in different radiation fields when switching to different working modes;

When the processor executes the computer program, the steps of the method for adjusting the specific absorption rate provided in the first aspect of the embodiments of the present application are implemented.

A third aspect provides a radio frequency device, including a radio frequency unit and the antenna device provided in the second aspect of the embodiment of the present application, and the radio frequency unit is respectively connected to a processor and an antenna tuner;

The radio frequency unit is used to generate a radio frequency signal and send it to the antenna tuner;

The antenna tuner is used to excite the radiator to generate a communication signal according to the radio frequency signal.

In a fourth aspect, a terminal device is provided, including the antenna device provided in the second aspect of the embodiments of the present application.

In a fifth aspect, a terminal device is provided, including the radio frequency device provided in the third aspect of the embodiments of the present application.

The sixth aspect provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the adjustment of the specific absorption rate provided by the first aspect of the embodiment of the present application is realized. method steps.

It can be understood that, for the beneficial effects of the above-mentioned second aspect to the sixth aspect, reference can be made to the related description in the above-mentioned first aspect, which will not be repeated here.

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 accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following descriptions are only for this application. For some embodiments, those skilled in the art can also obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a first structural schematic diagram of an antenna device provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a radiation field of a communication signal sent by a radiator provided in an embodiment of the present application;

Fig. 3 is a second structural schematic diagram of the antenna device provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of a third structure of an antenna device provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a fourth structure of the antenna device provided by the embodiment of the present application;

FIG. 6 is a first structural schematic diagram of a radio frequency device provided by an embodiment of the present application;

FIG. 7 is a first structural schematic diagram of a terminal device provided in an embodiment of the present application;

FIG. 8 is a second structural schematic diagram of a terminal device provided by an embodiment of the present application;

Fig. 9 is a schematic flow chart of the first method for adjusting the specific absorption rate provided by the embodiment of the present application;

Fig. 10 is a schematic diagram of the relationship between the specific absorption rate of the radiation point, the average specific absorption rate of the radiation point and the preset threshold provided by the embodiment of the present application;

Fig. 11 is a second schematic flow chart of the method for adjusting the specific absorption rate provided by the embodiment of the present application;

12 is a schematic diagram of the relationship between the SAR of the radiation point, the average SAR of the radiation point and the preset threshold when the working mode of the antenna tuner is adjusted according to the communication intensity provided by the embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and/or components, but does not exclude one or more other Presence or addition of features, wholes, steps, operations, elements, components and/or collections thereof.

In addition, in the description of the specification and the appended claims of the present application, the terms "first", "second", "third" and so on are only used to distinguish descriptions, and should not be understood as indicating or implying relative importance.

Reference to "one embodiment" or "some embodiments" or the like in the specification of the present application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

In the application, the current terminal equipment usually controls the SAR value to be smaller than the standard value by limiting the radio frequency power, or reduces the radio frequency power of the terminal equipment when the SAR value exceeds the standard value, and the reduction of the radio frequency power is likely to cause the communication performance of the terminal equipment to decline. Thus, the call quality or network quality of the terminal device is affected. Therefore, how to improve the communication performance of the terminal device while reducing the SAR value has become an urgent problem to be solved at present.

In view of the above technical problems, the embodiment of the present application provides a specific absorption rate adjustment method, by obtaining the average specific absorption rate of any radiation point in the radiation field shape, and detecting that the average specific absorption rate of any radiation point is greater than or equal to When the threshold is preset, the antenna tuner is controlled to switch the working mode, thereby adjusting the radiation field shape of the antenna to change the position of the radiation point with the highest specific absorption rate in the radiation field shape, so that the specific absorption rate of any of the above radiation points is reduced, thereby Reducing the average specific absorption rate of any of the above-mentioned radiation points can control the average specific absorption rate to be smaller than the standard value without reducing the radio frequency power of the terminal device, thereby improving the communication performance of the terminal device while reducing the SAR value.

As shown in FIG. 1 , the antenna device 100 provided by the embodiment of the present application includes an antenna tuner 110 , a radiator 120 , a memory 130 , a processor 140 , and a computer stored in the memory 130 and capable of running on the processor connected in sequence. program 150;

The memory 130, the processor 140, the antenna tuner 110 and the radiator 120 are sequentially connected;

The antenna tuner 110 is used to excite the radiator 120 to transmit communication signals with different radiation patterns when switching to different working modes;

When the processor 140 executes the computer program 150, the steps of the method for adjusting the SAR provided by the embodiment corresponding to FIG. 9 or FIG. 11 are implemented.

In an application, the antenna tuner 110 can be used to transmit a radio frequency (Radio Frequency, RF) signal generated by the processor 140 to the radiator 120, and can also be used to adjust the radiation frequency while keeping the radio frequency power of the radio frequency signal unchanged. The resonant frequency or resonant length of the body 120 changes the gain of the radio frequency signal of the radiator 120, thereby changing the radiation field shape of the communication signal. The antenna tuner 110 can be preset with multiple working modes. Different working modes correspond to different radiation patterns of the radiator 120 . Switching between different radiation patterns of the radiator 120 is realized by switching between different working modes. Switching between various working modes of the antenna tuner 110 can be realized through software control, specifically through the change of the working state of the software control circuit. Wherein, the radiator 120 can be a device capable of transmitting signals, and can change the radiation field shape of the signal according to the adjustment of parameters such as resonance frequency or resonance length. The radiator 120 can specifically be an antenna. There are no restrictions on specific device types.

In the application, the radiator 120 is used to gain the radio frequency signal, obtain the communication signal and send it to the peripheral communication device, and the electromagnetic wave waveform when the communication signal is output is the radiation field shape; the radiator 120 is also used to receive the output of the peripheral communication device feedback signal. Wherein, the peripheral communication device may be a base station or other terminal devices; when the radiator 120 receives the feedback signal, it may transmit the feedback signal to the processor 140 through the antenna tuner 110 .

FIG. 2 exemplarily shows a schematic diagram of the radiation field shape of the communication signal sent by the radiator 120, wherein the radiation field shape includes a plurality of circular radiation waves (that is, electromagnetic waves of the communication signal), and each radiation wave includes a plurality of radiation points. , the specific absorption rate of multiple radiation points on a radiation wave is equal.

In application, the processor 140 can be a central processing unit (Central Processing Unit, CPU), and the processor 140 can also be other general processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

In applications, the storage 130 may be an internal storage unit of the terminal device in some embodiments, such as a hard disk or memory of the terminal device. The memory 130 may also be an external storage device of the terminal device in other embodiments, such as a plug-in hard disk equipped on the terminal device, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, Flash card (Flash Card), etc. Further, the memory 130 may also include both an internal storage unit of the terminal device and an external storage device. The memory 130 is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as program codes of the computer program 150 . The memory 130 can also be used to temporarily store data that has been output or will be output.

As shown in FIG. 3, in one embodiment, based on the embodiment corresponding to FIG. 1, the antenna tuner 110 includes at least two switching modules 111, and each switching module 111 is used to switch the antenna tuner 110 to A corresponding working mode.

In an application, the antenna tuner 110 may have at least two built-in switching modules 111, and when each switching module 111 is invoked, the antenna tuner 110 switches to a corresponding working mode. The processor 140 can switch the antenna tuner 110 to different working modes by invoking different switching modules 111 , so as to realize switching of different radiation patterns of the radiator 120 .

In one embodiment, the radiator 120 includes multiple sub-radiators, each switching module 111 is connected to a corresponding sub-radiator, and each sub-radiator has a different radiation pattern when outputting communication signals.

In the application, when each switching module 111 is invoked, the antenna tuner is switched to a corresponding working mode, and the sub-radiators connected to the above-mentioned switching module 111 are driven to work, so as to realize different radiation patterns of the radiator 120 switch. Wherein, the physical length of each sub-radiator can be different, or the installation direction of each sub-radiator is different, or the installation position of each sub-radiator in the terminal device is different, and the embodiment of the present application implements the output communication signal for each sub-radiator The specific method of different radiation field shapes is not limited in any way.

As shown in FIG. 4, in one embodiment, based on the embodiment corresponding to FIG. The second end of the switch 112 is grounded.

In the application, the processor 140 can call the corresponding switching module 111 by controlling any switching module 111 and closing the switching switch 112 connected to it; disconnect to stop calling the corresponding switching module 111.

In the application, the second end of each switch 112 is grounded, specifically, it may be connected to the signal ground, and each switch can make the current of each switch module 111 different when called according to the ground point, so as to realize the When a switching module 111 is invoked, the antenna tuner 110 switches to a corresponding working mode.

In one embodiment, a passive component (Passive Component) is connected between the first end of each switch 112 and a corresponding switch module 111 .

In the application, the passive components can be capacitors, inductors or resistors, etc., by setting passive components with different parameters between the first end of each switching module 111 and a corresponding switching module 111, each switching module can be The magnitude of the current when 111 is called is different, so that when each switching module 111 is called, the antenna tuner 110 is switched to a corresponding working mode. The embodiment of the present application does not impose any limitation on the specific types and parameters of the passive components connected to each switching switch 112 .

As shown in FIG. 5, in one embodiment, based on the embodiment corresponding to FIG. 4, a signal detector 160 is further included, and the signal detector 160 is connected to the radiator 120 and the processor 140 respectively;

The signal detector 160 is used to obtain the communication strength and communication direction of the communication signal sent by the radiator 120 .

In the application, the communication strength of the communication signal can be determined according to the power of the radiator. The higher the communication strength, the higher the communication requirements of the terminal device, for example, the terminal device is talking. The communication direction indicates the direction in which the radiator sends the communication signal to the peripheral communication device, and the signal detector can send it to the processor after obtaining the communication strength and the communication direction.

As shown in FIG. 6, the radio frequency device 200 provided in the embodiment of the present application includes a radio frequency unit 210 and the antenna device 100 provided in the above embodiment, and the radio frequency unit is respectively connected to a processor and an antenna tuner;

The radio frequency unit 210 is used to generate a radio frequency signal and send it to the antenna tuner 110;

The antenna tuner 110 is used to excite the radiator 120 to generate a communication signal according to the radio frequency signal.

In one embodiment, the radio frequency unit 210 includes a transceiver 211 (Transceiver), a power amplifier 212 (Power Amplifier) and a low noise amplifier 213 (Low Noise Amplifier). The transceiver 211 communicates with the processor 140, the power amplifier 212 and the low noise amplifier respectively The amplifier 213 is connected, the power amplifier 212 is connected to the antenna tuner 110 , and the low noise amplifier 213 is connected to the antenna tuner 110 .

In the application, the radio frequency unit 210 is used to adjust the parameters of the radio frequency signal and the feedback signal, wherein the transceiver 211 is used to receive the radio frequency signal generated by the processor 140, and to determine the radio frequency of the radio frequency signal, and to receive and transmit the feedback signal to the processor 140; the power amplifier 212 is used to amplify the radio frequency of the radio frequency signal, and transmits the amplified radio frequency signal to the antenna tuner 110; the low noise amplifier 213 is used to receive the feedback signal transmitted by the antenna tuner 110, and for The noise of the feedback signal is reduced to improve the signal-to-noise ratio of the feedback signal, and is also used to transmit the processed feedback signal to the transceiver 211 .

As shown in Figure 7 and Figure 8, the terminal device 300 provided in the embodiment of the present application includes the antenna device 100 provided in the above embodiment, or includes the radio frequency device 200 provided in the above embodiment.

In applications, terminal devices can be mobile phones, tablet computers, wearable devices, vehicle-mounted devices, augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR) devices, notebook computers, ultra-mobile personal computers (ultra-mobile personal computer, UMPC), netbook, personal digital assistant (personal digital assistant, PDA), etc., the embodiment of the present application does not impose any limitation on the specific type of the terminal device.

In the application, the terminal device 300 can be equipped with the antenna device 100 or the radio frequency device 200 provided in the above embodiments, so that the terminal device 300 can switch the working mode through the antenna tuner to adjust the radiation field of the radiator.

It can be understood that the structures shown in the embodiments of the present application do not constitute specific limitations on the antenna device 100 , the radio frequency device 200 and the terminal device 300 . In other embodiments of the present application, the antenna device 100, the radio frequency device 200, and the terminal device 300 may include more or fewer components than shown in the figure, or combine some components, or different components, for example, may also include input and output equipment, network access equipment, etc. The illustrated components can be realized in hardware, software or a combination of software and hardware.

As shown in Figure 9, the SAR adjustment method provided in the embodiment of the present application is applied to the antenna device, radio frequency device or terminal device provided in the above embodiment, including the following steps S901 and S902:

Step S901, obtaining the average specific absorption rate of any radiation point in the radiation field, wherein the average specific absorption rate represents the average value of the specific absorption rate within a preset period, and the average specific absorption rate returns to zero every time a preset period passes;

In the application, the processor can obtain the current working mode of the antenna tuner to obtain the current radiation field shape of the antenna, so as to obtain the average specific absorption rate of any radiation point in the radiation field shape. The average specific absorption rate will be described below.

In the application, the preset period may be determined according to the period for calculating the SAR standard value by the communication regulatory agency in the area where the terminal device is located, and may specifically be 6 minutes. Every time a preset period passes, the average specific absorption rate can be cleared, and the average specific absorption rate can be recalculated in the next preset cycle, so that the average specific absorption rate of any radiation point calculated by the processor can be equal to or close to the communication regulatory agency Obtain the monitored average SAR.

In one embodiment, step S901 includes:

Obtain the average specific absorption rate of any radiation point located in the preset area within the radiation field;

Alternatively, obtain the average specific absorption rate for each radiant point within the radiant field;

Alternatively, obtain the average SAR for any radiant point within the radiant field.

In the application, after obtaining the current radiation field of the antenna, the processor can obtain the average specific absorption rate of any position and any number of radiation points in the radiation field, specifically, the radiation field located in the preset area can be obtained The average specific absorption rate of any radiation point in the radiation field; the average specific absorption rate of each radiation point in the radiation field can also be obtained; the average specific absorption rate of any radiation point in the radiation field can also be obtained. Wherein, the preset area can be set according to actual needs, specifically, it can be an area with a higher average specific absorption rate in the radiation field. It should be noted that the more the average SAR of the radiation points is obtained, the more sufficient the average SAR of the radiation points in the radiation field can be detected, and the adjustment effect of the SAR will be better.

In one embodiment, before step S901, it also includes:

According to the installation position of the antenna on the terminal device, a spatial coordinate system centered on the antenna is established. The spatial coordinate system includes a plurality of coordinates to be measured, and each coordinate to be measured is used to reflect the position of a corresponding radiation point in the radiation field.

In the application, the processor can obtain the installation position of the antenna on the terminal device, and establish a spatial coordinate system centered on the antenna, specifically a Space Rectangular Coordinate System (Space Rectangular Coordinate System). The space coordinate system includes a plurality of coordinates to be measured, each coordinate to be measured corresponds to a radiation point, and is used to reflect the position of a corresponding radiation point in the radiation field. Wherein, the specific installation position of the antenna on the terminal device is determined according to the circuit layout of the actual terminal device.

Step S902, when the average specific absorption rate of any radiation point in the radiation field is greater than or equal to a preset threshold, control the antenna tuner to switch to the first working mode, so as to reduce the specific absorption rate of any radiation point;

In the application, the preset threshold value may be smaller than the standard value specified by the regulatory agency. It is understandable that the preset threshold value is smaller than the standard value specified by the regulatory agency. The larger it is, the smaller it is set, the smaller the average specific absorption rate of each radiation point. The specific size of the preset threshold can be set according to actual needs.

In the application, the antenna tuner can have a preset working mode, and at the beginning of each preset period, the antenna tuner can switch to the preset working mode to run, or keep running in the working mode used in the last preset period.

In the application, the processor can determine whether the average specific absorption rate of each radiation point is greater than or equal to a preset threshold, and when the average specific absorption rate of all radiation points acquired in step S901 is less than the preset threshold, it means that all the above-mentioned radiation The average specific absorption rate of any radiation point is less than the standard value set by the regulatory agency, and the antenna tuner is controlled to maintain the current working mode; when the average specific absorption rate of any radiation point is greater than or equal to the preset threshold, it means that the average of any radiation point above The specific absorption rate is close to the standard value set by the regulatory agency, and the radiation field shape of the antenna can be changed by controlling the antenna tuner to switch to the first working mode different from the current working mode, so as to reduce the specific absorption rate of any of the above radiation points.

It should be noted that when the processor detects that the average specific absorption rate of any radiation point is greater than or equal to the preset threshold, it also indicates that the average specific absorption rate of any of the above radiation points in the current radiation field of the antenna is high or In the radiation field of any antenna, there is only one radiation point or multiple radiation points in the same radiation wave have the highest specific absorption rate, and when the RF power of the RF signal is constant, changing the antenna’s The radiation field shape will change the position of a radiation point with the highest specific absorption rate or multiple radiation points in the same radiation wave, so as to reduce the specific absorption rate of any radiation point above, and then reduce the radiation point of any radiation point above. average specific absorption rate.

Fig. 10 exemplarily shows a schematic diagram of the relationship between the specific absorption rate of the radiation point, the average specific absorption rate of the radiation point and the preset threshold, wherein the preset period is equal to T, and in the first preset period 1T, at t1 When the average SAR of a radiation point is obtained at any time equal to the preset threshold, the antenna tuner switches to the first working mode, and the SAR of the radiation point decreases, thereby reducing the average SAR; the radiation point within the second cycle 2T The change of SAR is the same as that in the first period T1 mentioned above, and will not be repeated here. The difference is that the antenna tuner switches to the preset working mode at the beginning of the second period 2T.

In the application, by obtaining the average specific absorption rate of any radiation point in the radiation field, and when the average specific absorption rate of any radiation point is detected to be greater than or equal to the preset threshold, the antenna tuner is controlled to switch the working mode, thereby adjusting The radiation field shape of the antenna, in order to change the position of the radiation point with the highest specific absorption rate in the radiation field shape, so that the specific absorption rate of any radiation point above in the radiation field shape corresponding to the radiation point is reduced, thereby reducing the average specific absorption rate, The average specific absorption rate can be controlled to be smaller than the standard value without reducing the radio frequency power of the terminal equipment, thereby improving the communication performance of the terminal equipment while reducing the SAR value.

As shown in FIG. 11, in one embodiment, based on the embodiment corresponding to FIG. 9, the following steps S1101 to S1105 are included:

Step S1101, obtaining the average specific absorption rate of any radiation point in the radiation field, wherein the average specific absorption rate represents the average value of the specific absorption rate within a preset period, and the average specific absorption rate returns to zero every time a preset period passes;

In the application, the adjustment method provided in step S1101 is consistent with the adjustment method provided in step S901 above, and will not be repeated here.

Step S1102, acquiring the communication strength and communication direction of the communication signal through the signal detector.

In the application, the signal detector can obtain the communication strength and communication direction of the communication signal by reading the working state of the antenna. Specifically, the antenna power can be obtained by reading the working state of the antenna to determine the communication strength; The working state of the antenna acquires the communication direction in which the antenna transmits the communication signal to the peripheral communication device.

Step S1103, when the communication strength of the communication signal is greater than the preset communication strength, control the antenna tuner to switch to the second working mode, so that the radiation field shape of the antenna is shifted to the communication direction, so as to increase the ratio of radiation points in the communication direction Absorption rate;

Step S1104, when the communication intensity of the communication signal is lower than the preset communication intensity, control the antenna tuner to switch to the third working mode, so that the radiation field shape of the antenna shrinks in the communication direction, so as to reduce the ratio of radiation points in the communication direction Absorption rate.

In the application, the preset communication strength can be set according to actual needs. Specifically, it can be that the terminal device can reach the communication strength corresponding to the preset call quality; it can also be that the terminal device can reach the communication strength corresponding to the preset network quality. The embodiment of the application does not impose any limitation on the specific size of the preset communication strength.

In the application, when the communication strength of the communication signal is greater than the preset communication strength, it means that the communication demand of the current terminal equipment is increasing, and the antenna tuner can be controlled to switch to the second working mode, so that the radiation field shape of the antenna is shifted to the communication direction, In order to improve the specific absorption rate of the radiation point in the communication direction.

It should be noted that the second working mode may include multiple sub-working modes, and different sub-working modes of the second working mode are used to shift the radiation field shape of the antenna to different communication directions. The number and specific types of sub-working modes included are not limited in any way.

In the application, when the communication intensity of the communication signal is lower than the preset communication intensity, it means that the communication demand of the current terminal device is reduced, and the antenna tuner can be controlled to switch to the third working mode, so that the radiation field of the antenna shrinks in the communication direction, To reduce the specific absorption rate of the radiation point in the communication direction.

It should be noted that the third working mode may include multiple sub-working modes, and the different sub-working modes of the third working mode are used to shrink the radiation field shape of the antenna to different communication directions. The embodiment of the present application includes the third working mode The number and specific types of sub-working modes are not limited in any way.

It should be noted that the above-mentioned first to third working modes are only exemplary, and are used to illustrate how the antenna tuner adjusts the radiation pattern of the antenna under different working conditions. The antenna tuner can include multiple working modes, and different working modes correspond to different radiation patterns of the antenna. The embodiment of the present application does not make any assumptions about the number of working modes included in the antenna tuner and the specific radiation pattern corresponding to each working mode. limit.

Fig. 12 exemplarily shows a schematic diagram of the relationship between the specific absorption rate of the radiation point, the average specific absorption rate of the radiation point and the preset threshold when the working mode of the antenna tuner is adjusted according to the communication strength, wherein the preset period is equal to T, In the first preset period 1T, the communication intensity is greater than the preset communication intensity at time t3, the antenna tuner is switched to the second working mode, and the specific absorption rate of the radiation point is increased; the communication intensity is lower than the preset communication intensity at time t4, When the antenna tuner switches to the third working mode, the specific absorption rate of the radiation point decreases, thereby reducing the average specific absorption rate; the change of the specific absorption rate of the radiation point in the second period 2T is consistent with the above-mentioned first period T1, and in This will not be described again, the difference is that, at the beginning of the second period 2T, the antenna tuner switches to the preset working mode.

Step S1105, when the average specific absorption rate of any radiation point in the radiation field is greater than or equal to a preset threshold, control the antenna tuner to switch to the first working mode, so as to reduce the specific absorption rate of any radiation point;

In the application, the adjustment method provided in step S1105 is consistent with the adjustment method provided in step S902 above, and will not be repeated here. The difference is that the execution sequence of step S1105 may be before step S1103 or step S1104, or after step S1103 or step S1104. The embodiment of the present application does not impose any limitation on the execution sequence of step S1103 to step S1105.

In the application, the communication strength and communication direction of the communication signal are obtained through the signal detector, and the antenna tuner can be controlled to switch between different working modes according to whether the communication strength is greater than the preset communication strength, so that the terminal device can change the antenna according to the actual communication needs When the communication demand increases, the specific absorption rate in the corresponding communication direction is increased, and when the communication demand decreases, the specific absorption rate in the corresponding communication direction is reduced, so as to realize the dynamic adjustment of the SAR value, and reduce the SAR value. At the same time, the communication performance of the terminal equipment is improved.

It should be understood that the sequence numbers of the steps in the above embodiments do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it can realize the above-mentioned specific absorption rate adjustment method in the embodiment step.

If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the procedures in the method of the above-mentioned embodiments in the present application can be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. The computer program When executed by a processor, the steps in the above-mentioned various method embodiments can be realized. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying computer program codes to a photographing terminal device, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random-access memory (RAM) , Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media. Such as U disk, mobile hard disk, magnetic disk or CD, etc.

In the above-mentioned embodiments, the descriptions of each embodiment have their own emphases, and for parts that are not detailed or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.

Those skilled in the art can appreciate that the modules and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

In the embodiments provided in this application, it should be understood that the disclosed terminal device and method may be implemented in other ways. For example, the terminal device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined Or it can be integrated into another system, or some features can 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 modules may be in electrical, mechanical or other forms.

The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still implement the foregoing embodiments Modifications to the technical solutions described in the examples, or equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application, and should be included in the Within the protection scope of this application.

Claims

A method for adjusting specific absorption rate, characterized in that it comprises:

Obtaining the average specific absorption rate of any radiation point in the radiation field, wherein the average specific absorption rate represents the average value of the specific absorption rate within a preset period, and the average specific absorption rate is reset to zero every time a preset period passes ;

When the average specific absorption rate of any radiation point in the radiation field is greater than or equal to a preset threshold, control the antenna tuner to switch to the first working mode, so as to reduce the specific absorption rate of any radiation point;

Wherein, the antenna tuner includes at least two working modes, and when the antenna tuner is switched to a different working mode, the antenna is excited to transmit communication signals in different radiation patterns.
The adjustment method according to claim 1, wherein said obtaining the average specific absorption rate of any radiation point in the radiation field shape comprises:

Obtain the average specific absorption rate of any radiation point located in the preset area within the radiation field;

Alternatively, obtain the average specific absorption rate for each radiant point within the radiant field;

Alternatively, obtain the average SAR for any radiant point within the radiant field.
The adjustment method according to claim 1, further comprising:

Obtain the communication strength and communication direction of the communication signal through a signal detector.
The adjustment method according to claim 3, characterized in that, after acquiring the communication strength and communication direction of the communication signal through the signal detector, it comprises:

When the communication strength of the communication signal is greater than the preset communication strength, the antenna tuner is controlled to switch to the second working mode, so that the radiation field shape of the antenna is shifted to the communication direction, so as to improve the The specific absorption rate of the radiant point in the direction.
The adjustment method according to claim 3, characterized in that, after acquiring the communication strength and communication direction of the communication signal through the signal detector, it comprises:

When the communication strength of the communication signal is less than the preset communication strength, the antenna tuner is controlled to switch to the third working mode, so that the radiation field of the antenna shrinks in the communication direction, so as to reduce the The specific absorption rate of the radiant point in the direction.
The adjustment method according to any one of claims 1 to 5, characterized in that the method further comprises:

According to the installation position of the antenna on the terminal device, establish a spatial coordinate system centered on the antenna, the spatial coordinate system includes a plurality of coordinates to be measured, and each coordinate to be measured is used to reflect the location of a corresponding radiation point position within the radiation field described above.
An antenna device, characterized in that it comprises an antenna tuner, a radiator, a memory, a processor connected in sequence, and a computer program stored in the memory and operable on the processor;

The memory, the processor, the antenna tuner and the radiator are sequentially connected;

The antenna tuner is used to excite the radiator to emit communication signals in different radiation fields when switching to different working modes;

When the processor executes the computer program, the steps of the method for adjusting the specific absorption rate according to any one of claims 1 to 6 are realized.
The antenna device according to claim 7, wherein the antenna tuner comprises at least two switching modules, each switching module is used to switch the antenna tuner to a corresponding working mode when called.
The antenna device according to claim 8, wherein the radiator includes a plurality of sub-radiators, each switching module is linked to a corresponding sub-radiator, and each sub-radiator has a different radiation field when outputting a communication signal .
The antenna device according to claim 9, characterized in that, the physical length of each sub-radiator is different, or the setting direction of each sub-radiator is different, or, each sub-radiator is located at the end of the terminal device. The installation location is different.
The antenna device according to claim 8, further comprising at least two switches, the first end of each switch is connected to a corresponding switching module, and the second end of each switch is grounded.
The antenna device according to claim 11, wherein a passive element is connected between the first end of each switch and a corresponding switching module, and the passive element is used to adjust the corresponding switching module to be called When the current magnitude.
The antenna device of claim 12, wherein the passive element comprises at least one of a capacitor, an inductor, and a resistor.
The antenna device according to claim 7, further comprising a signal detector connected to the radiator and the processor respectively;

The signal detector is used to obtain the communication strength and communication direction of the communication signal sent by the radiator, and feed it back to the processor.
The antenna device according to claim 7, wherein the radiator is used to send a communication signal to a peripheral communication device;

The feedback signal output by the peripheral communication device is received, and the feedback signal is transmitted to the processor through the antenna tuner.
A radio frequency device, comprising a radio frequency unit and the antenna device according to claim 7, the radio frequency unit is respectively connected to a processor and an antenna tuner;

The radio frequency unit is used to generate a radio frequency signal and send it to the antenna tuner;

The antenna tuner is used to excite the radiator to generate a communication signal according to the radio frequency signal.
The radio frequency device according to claim 16, wherein the radio frequency unit comprises a transceiver, a power amplifier and a low noise amplifier, the transceiver is connected with the processor, the power amplifier and the low noise amplifier respectively, and the power amplifier and the antenna tuner connections, LNA and antenna tuner connections;

The transceiver is used to receive the radio frequency signal generated by the processor, and determine the radio frequency of the radio frequency signal, and is also used to receive and transmit a feedback signal to the processor;

The power amplifier is used to amplify the radio frequency of the radio frequency signal, and transmit the amplified radio frequency signal to the antenna tuner;

The low noise amplifier is used to receive the feedback signal transmitted by the antenna tuner, and is used to reduce the noise of the feedback signal to improve the signal-to-noise ratio of the feedback signal, and is also used to transmit the processed feedback signal to the transceiver .
A terminal device, characterized by comprising the antenna device according to claim 7.
A terminal device, characterized by comprising the radio frequency device as claimed in claim 16.
A computer-readable storage medium, the computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the steps of the method for adjusting the specific absorption rate according to claim 1 are realized.