CN111064485A - Control method of electromagnetic wave absorption ratio and electronic equipment - Google Patents
Control method of electromagnetic wave absorption ratio and electronic equipment Download PDFInfo
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- CN111064485A CN111064485A CN201911392340.2A CN201911392340A CN111064485A CN 111064485 A CN111064485 A CN 111064485A CN 201911392340 A CN201911392340 A CN 201911392340A CN 111064485 A CN111064485 A CN 111064485A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
- H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
Abstract
The invention discloses a control method of an electromagnetic wave absorption ratio and electronic equipment. The method is applied to an electronic device, the electronic device is provided with a bidirectional directional coupler and an antenna, and the bidirectional directional coupler is connected with the antenna in a communication mode, and the method comprises the following steps: coupling by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power; calculating by using the forward coupling power and the reverse coupling power to obtain an antenna standing wave ratio; comparing the standing-wave ratio of the antenna with a preset threshold value, and judging whether an object is close to the antenna to obtain a judgment result; and adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio. The invention adjusts the transmitting power by calculating the standing wave ratio of the antenna, thereby realizing the control of the absorption ratio of the electromagnetic wave, and the control method is simple and convenient.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for controlling an electromagnetic wave absorption ratio and an electronic device.
Background
Electronic devices such as cell phones have transmitting antennas that generate electromagnetic radiation when transmitting signals. SAR (Specific Absorption Rate) is an electromagnetic wave energy Absorption ratio of a mobile phone or other electronic equipment, and is defined as: under the action of the external electromagnetic field, an induction electromagnetic field is generated in the human body. In consideration of safety, the SAR value of electronic equipment such as a mobile phone and the like cannot be larger than the specified range of the safe SAR. Therefore, when a human body or an object approaches an electronic device such as a mobile phone, it is necessary to adjust an electromagnetic wave absorption ratio of the electronic device such as the mobile phone so that the electromagnetic wave absorption ratio is not greater than a range specified by the safety SAR.
The existing control method of the electromagnetic wave ratio is to add a sensor and a controller in electronic equipment such as a mobile phone and the like, detect whether an object approaches by using the sensor, and when the sensor detects that the object approaches, feed back the object to a processing system through the controller to trigger an uplink transmission power backoff mode (back-off mode), so as to reduce the influence of electromagnetic waves on a human body. Since the sensor and the controller are added, the control method is complicated, and it is complicated to design and manufacture a PCB (Printed Circuit Board).
Disclosure of Invention
An embodiment of the present invention provides a method for controlling an electromagnetic wave absorption ratio and an electronic device, which are used to solve the problem that an SAR control method in the prior art is complex.
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme: a method for controlling an electromagnetic wave absorption ratio, the method being applied to an electronic device, the electronic device having a bidirectional directional coupler and an antenna, the bidirectional directional coupler being communicatively connected to the antenna, the method comprising the steps of:
coupling by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power;
calculating by using the forward coupling power and the reverse coupling power to obtain an antenna standing wave ratio;
comparing the standing-wave ratio of the antenna with a preset threshold value, and judging whether an object is close to the antenna to obtain a judgment result;
and adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio.
Optionally, the obtaining of the forward coupling power and the reverse coupling power by using the bidirectional directional coupler includes:
detecting input power and reflected power of an antenna;
and respectively coupling the input power and the reflected power by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power.
Optionally, the obtaining of the standing-wave ratio of the antenna by using the forward coupling power and the reverse coupling power includes:
calculating by utilizing the forward coupling power and the reverse coupling power to obtain a first coefficient;
and calculating by using the first coefficient to obtain the antenna standing wave ratio.
Optionally, the comparing the standing-wave ratio of the antenna with a preset threshold value to determine whether an object is close to the antenna, and obtaining a determination result specifically includes:
comparing the antenna standing-wave ratio with a preset threshold value;
when the standing-wave ratio of the antenna is larger than or equal to the preset threshold value, judging that an object approaches the antenna; otherwise, judging that no object is close to the antenna;
or when the standing-wave ratio of the antenna is smaller than or equal to the preset threshold value, judging that an object is close to the antenna; otherwise, judging that no object is close to the antenna.
Optionally, the adjusting, according to the determination result, the transmission power of the antenna to control the electromagnetic wave absorption ratio specifically includes:
when an object is judged to be close to the antenna, performing power backspacing treatment on the transmitting power of the antenna to reduce the absorption ratio of electromagnetic waves;
and when judging that no object is close to the antenna, not performing power back-off processing on the transmitting power of the antenna.
To solve the above problem, the present invention provides an electronic device, the electronic device having a bidirectional directional coupler and an antenna, the bidirectional directional coupler being communicatively connected to the antenna, the electronic device further comprising:
the acquisition module is used for acquiring forward coupling power and reverse coupling power by utilizing coupling of the bidirectional directional coupler;
the calculation module is used for calculating and obtaining the standing-wave ratio of the antenna by utilizing the forward coupling power and the reverse coupling power;
the judging module is used for comparing the standing-wave ratio of the antenna with a preset threshold value and judging whether an object is close to the antenna or not so as to obtain a judging result;
and the control module is used for adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio.
Optionally, the obtaining module is specifically configured to:
detecting input power and reflected power of an antenna;
and respectively coupling the input power and the reflected power by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power.
Optionally, the calculation module is specifically configured to: calculating by utilizing the forward coupling power and the reverse coupling power to obtain a first coefficient;
and calculating by using the first coefficient to obtain the antenna standing wave ratio.
Optionally, the determining module is specifically configured to: comparing the antenna standing-wave ratio with a preset threshold value;
when the standing-wave ratio of the antenna is larger than or equal to the preset threshold value, judging that an object approaches the antenna; otherwise, judging that no object is close to the antenna;
or when the standing-wave ratio of the antenna is smaller than or equal to the preset threshold value, judging that an object is close to the antenna; otherwise, judging that no object is close to the antenna.
Optionally, the control module is specifically configured to: when an object is judged to be close to the antenna, performing power backspacing treatment on the transmitting power of the antenna to reduce the absorption ratio of electromagnetic waves;
and when judging that no object is close to the antenna, not performing power back-off processing on the transmitting power of the antenna.
The embodiment of the invention has the beneficial effects that: the transmitting power is adjusted by calculating the standing wave ratio of the antenna, so that the electromagnetic wave absorption ratio is controlled, and the control method is simple and convenient. And hardware such as a sensor controller and the like is not required to be added, and the PCB is simple to design and manufacture.
Drawings
FIG. 1 is a flowchart illustrating a method for controlling an electromagnetic wave absorption ratio according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for controlling an electromagnetic wave absorption ratio according to another embodiment of the present invention;
FIG. 3 is a diagram illustrating forward coupled power detection and reverse coupled power detection in an embodiment of the present invention;
fig. 4 is a block diagram of an electronic device according to another embodiment of the invention.
Detailed Description
Various aspects and features of the present application are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The embodiment of the invention provides a method for controlling an electromagnetic wave absorption ratio, which is applied to electronic equipment, wherein the electronic equipment is provided with a bidirectional directional coupler and an antenna, the bidirectional directional coupler is in communication connection with the antenna, and the method comprises the following steps: coupling by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power; calculating by using the forward coupling power and the reverse coupling power to obtain an antenna standing wave ratio; comparing the standing-wave ratio of the antenna with a preset threshold value, and judging whether an object is close to the antenna to obtain a judgment result; and adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio. The embodiment of the invention adjusts the transmitting power by calculating the standing wave ratio of the antenna, thereby realizing the control of the absorption ratio of the electromagnetic waves, and the control method is simple and convenient. And hardware such as a sensor controller and the like is not required to be added, and the PCB is simple to design and manufacture.
An embodiment of the present invention provides a method for controlling an electromagnetic wave absorption ratio, which is specifically applied to an electronic device, wherein a bidirectional directional coupler is disposed in the electronic device, the bidirectional directional coupler is in communication connection or electrical connection with an antenna in the electronic device, and when controlling the electromagnetic wave absorption ratio of the electronic device, the method is as shown in fig. 1, and specifically includes the following steps:
step S101, coupling by using a bidirectional directional coupler to obtain forward coupling power and reverse coupling power;
in the specific implementation process, a bidirectional directional coupler is used for detecting the input power of an antenna, and then forward coupling power is obtained according to the input power coupling of the antenna; and meanwhile, the reflected power of the antenna is detected by using the bidirectional directional coupler, and the reverse coupling power is obtained according to the reflected power coupling. Specifically, the bidirectional directional coupler may also be used to detect the output power of the wireless transmission device (i.e. the WWAN module/Modem module), which is the input power of the antenna.
A bidirectional directional coupler is a detection device for shunt sampling of microwave power signals, which is actually a coupler capable of detecting both transmitted power and reflected power.
Power measurement, signal detection, display indication and monitoring of directed microwave signals
Step S102, calculating by using the forward coupling power and the reverse coupling power to obtain an antenna standing wave ratio;
in this step, after the forward coupling power and the reverse coupling power are coupled, a coefficient can be calculated by using the forward coupling power and the reverse coupling power, and then the standing-wave ratio of the antenna is calculated according to the coefficient.
Step S103, comparing the standing-wave ratio of the antenna with a preset threshold value, and judging whether an object is close to the antenna to obtain a judgment result;
before comparison, a threshold value may be preset according to an actual situation, where the threshold value is a critical value, and may be obtained according to an antenna standing wave ratio calculated when an object approaches an antenna for several times, for example, after a thousand times of experiments in which an object approaches an antenna, 1000 antenna standing wave ratios corresponding to the 1000 times of experiments are determined, a maximum value and a minimum value of the 1000 times of experiments are removed, and an average value of the remaining antenna standing wave ratios is calculated to determine the threshold value. Specifically, the above is only one method for determining the threshold, other methods may be used to determine the threshold, and the number of experiments may be adjusted according to actual needs. After the threshold value is determined, the antenna standing wave ratio obtained through calculation can be compared with a preset threshold value, and whether an object approaches the electronic equipment or not is determined according to the comparison result.
And step S104, adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio.
In this step, when the determination result is that an object is close to the electronic device, the transmission power of the antenna can be adjusted, so as to control the electromagnetic wave absorption ratio.
The embodiment of the invention detects the input power and the reflected power of the antenna by using the bidirectional directional coupler to obtain the forward coupling power and the reverse coupling power, and further realizes the calculation of the antenna standing wave ratio by using the forward coupling power and the reverse coupling power, thereby realizing the purpose of determining whether an object is close to the antenna according to the antenna standing wave ratio, adjusting the transmitting power of the antenna when the object is close to the antenna, meeting the SAR requirement, and on the basis of meeting the SAR requirement, considering the uplink power control, meeting the requirement of signal transmission and ensuring the normal communication.
Another embodiment of the present invention provides a method for controlling an electromagnetic wave absorption ratio, as shown in fig. 2, including the following steps:
step S201, detecting the input power and the reflected power of an antenna;
and respectively coupling the input power and the reflected power by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power.
The step is to detect the input power and the reflected power of the antenna by utilizing the bidirectional directional coupler. In the implementation, as shown in fig. 3, the antenna is connected to the wireless transmission device (i.e., the Modem module/WWAN module) for communication, and the output power of the Modem module is equal to the input power P _ in of the antenna, so that the output power of the wireless transmission device can also be detected by the bidirectional directional coupler, and the forward coupling power can be obtained according to the output power. In fig. 3, P _ refl represents reverse coupling power, and P _ coup represents forward coupling power.
Step S202, calculating by utilizing the forward coupling power and the reverse coupling power to obtain a first coefficient;
and calculating by using the first coefficient to obtain the antenna standing wave ratio.
In this step, after the forward coupling power and the reverse coupling power are obtained, a first coefficient can be obtained by using a first calculation formula, where the first calculation formula is: Γ is 10log (P _ refl/P _ coup), where Γ denotes the first coefficient, P _ refl denotes the reverse coupling power, and P _ coup denotes the forward coupling power.
After the first coefficient is obtained, the standing-wave ratio of the antenna can be calculated by using a second calculation formula, wherein the second calculation formula is as follows: VSWR is (1+ Γ)/(1- Γ), where VSWR denotes an antenna standing wave ratio, and Γ denotes a first coefficient.
Step S203, comparing the standing-wave ratio of the antenna with a preset threshold value;
when the standing-wave ratio of the antenna is larger than or equal to the preset threshold value, judging that an object approaches the antenna; otherwise, judging that no object is close to the antenna;
or when the standing-wave ratio of the antenna is smaller than or equal to the preset threshold value, judging that an object is close to the antenna; otherwise, judging that no object is close to the antenna.
In this step, a threshold may be preset according to an actual situation in a specific implementation process, and then the standing-wave ratio of the antenna is compared with the preset threshold.
Step S204, when judging that an object is close to the antenna, performing power backspacing treatment on the transmitting power of the antenna to reduce the absorption ratio of electromagnetic waves;
and when judging that no object is close to the antenna, not performing power back-off processing on the transmitting power of the antenna.
In this step, when it is determined that an object is close to the antenna, a corresponding transmission power table may be called, a target transmission power of the antenna is obtained by searching the transmission power table, and finally, power backoff processing is performed on the transmission of the antenna according to the target transmission power. In this embodiment, the transmission power table may be preset, and different antenna standing-wave ratios may correspond to different transmission powers according to actual needs, so as to obtain a mapping relationship between the antenna standing-wave ratio and the transmission power, and further obtain the transmission power table.
In the implementation of the invention, the first calculation formula and the second calculation formula are utilized to calculate and obtain the standing-wave ratio of the antenna according to the forward coupling power and the reverse coupling power detected by the bidirectional coupler, an object is determined to be close to the antenna according to the change of the standing-wave ratio of the antenna, and the transmitting power of the antenna is correspondingly adjusted to meet the SAR requirement. In the electronic equipment of the embodiment of the invention, only the coupler is added, other devices are not added to system hardware, and the coupler adopts the bidirectional directional coupler. The system wiring does not increase power supply and control circuit, and the complexity of system hardware design is reduced.
Another embodiment of the present invention provides an electronic device, as shown in fig. 4, where the electronic device has a bidirectional directional coupler and an antenna, the bidirectional directional coupler is communicatively connected to the antenna, and the electronic device further includes:
the device comprises an acquisition module 1, a power conversion module and a power conversion module, wherein the acquisition module 1 is used for acquiring forward coupling power and reverse coupling power by utilizing coupling of a bidirectional directional coupler; in the specific working process of the acquisition module, the bidirectional directional coupler is used for detecting the input power of the antenna, and then the forward coupling power is obtained according to the input power coupling of the antenna; and meanwhile, the reflected power of the antenna is detected by using the bidirectional directional coupler, and the reverse coupling power is obtained according to the reflected power coupling. Specifically, the bidirectional directional coupler may also be used to detect the output power of the wireless transmission device (i.e. the WWAN module/Modem module), which is the input power of the antenna.
The calculating module 2 is used for calculating and obtaining the standing-wave ratio of the antenna by utilizing the forward coupling power and the reverse coupling power;
the judging module 3 is used for comparing the standing-wave ratio of the antenna with a preset threshold value and judging whether an object is close to the antenna or not so as to obtain a judgment result; before the comparison, the judgment module may preset a threshold according to an actual situation, store the threshold, compare the calculated standing-wave ratio of the antenna with the preset threshold, and determine whether an object is close to the electronic device according to a comparison result.
And the control module 4 is used for adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio.
The obtaining module in this embodiment is specifically configured to: detecting input power and reflected power of an antenna; and respectively coupling the input power and the reflected power by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power.
In a specific implementation process of the present implementation, the calculation module is specifically configured to: calculating by utilizing the forward coupling power and the reverse coupling power to obtain a first coefficient;
and calculating by using the first coefficient to obtain the antenna standing wave ratio.
Specifically, the first calculation formula is: Γ is 10log (P _ refl/P _ coup), where Γ denotes the first coefficient, P _ refl denotes the reverse coupling power, and P _ coup denotes the forward coupling power.
After the first coefficient is obtained, the calculation module may calculate the standing-wave ratio of the antenna by using a second calculation formula, where the second calculation formula is: VSWR is (1+ Γ)/(1- Γ), where VSWR denotes an antenna standing wave ratio, and Γ denotes a first coefficient. In the process of this embodiment of the present invention, the determining module is specifically configured to: comparing the antenna standing-wave ratio with a preset threshold value;
when the standing-wave ratio of the antenna is larger than or equal to the preset threshold value, judging that an object approaches the antenna; otherwise, judging that no object is close to the antenna;
or when the standing-wave ratio of the antenna is smaller than or equal to the preset threshold value, judging that an object is close to the antenna; otherwise, judging that no object is close to the antenna.
In this implementation, the control module is specifically configured to: when an object is judged to be close to the antenna, performing power backspacing treatment on the transmitting power of the antenna to reduce the absorption ratio of electromagnetic waves;
and when judging that no object is close to the antenna, not performing power back-off processing on the transmitting power of the antenna.
In a specific implementation process of this embodiment, the determining module may store a transmission power table in advance, and when the determining module determines that an object is close to the antenna, the determining module may call the transmission power table, obtain a target transmission power of the antenna by searching the transmission power table, and finally perform power backoff on transmission of the antenna according to the target transmission power.
The invention uses the bidirectional directional coupler to detect the change of the standing wave coefficient of the antenna, and then judges whether an object approaches the electronic equipment, and when the object approaches the electronic equipment, the transmitting power of the antenna is adjusted to realize the adjustment of the transmitting power of the antenna in the electronic equipment, so that the SAR of the antenna meets the specification.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (10)
1. A method for controlling an absorption ratio of an electromagnetic wave, the method being applied to an electronic device having a bidirectional directional coupler and an antenna, the bidirectional directional coupler being communicatively connected to the antenna, the method comprising the steps of:
coupling by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power;
calculating by using the forward coupling power and the reverse coupling power to obtain an antenna standing wave ratio;
comparing the standing-wave ratio of the antenna with a preset threshold value, and judging whether an object is close to the antenna to obtain a judgment result;
and adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio.
2. The method of claim 1, wherein the obtaining forward coupled power and reverse coupled power using bidirectional directional coupler coupling comprises:
detecting input power and reflected power of an antenna;
and respectively coupling the input power and the reflected power by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power.
3. The method of claim 1, wherein the obtaining the antenna standing wave ratio by using the forward coupling power and the reverse coupling power calculation comprises:
calculating by utilizing the forward coupling power and the reverse coupling power to obtain a first coefficient;
and calculating by using the first coefficient to obtain the antenna standing wave ratio.
4. The method according to claim 1, wherein the comparing the standing-wave ratio of the antenna with a preset threshold value to determine whether an object is close to the antenna and obtain a determination result specifically includes:
comparing the antenna standing-wave ratio with a preset threshold value;
when the standing-wave ratio of the antenna is larger than or equal to the preset threshold value, judging that an object approaches the antenna; otherwise, judging that no object is close to the antenna;
or when the standing-wave ratio of the antenna is smaller than or equal to the preset threshold value, judging that an object is close to the antenna; otherwise, judging that no object is close to the antenna.
5. The method according to claim 1, wherein the adjusting the transmission power of the antenna according to the determination result to control the electromagnetic wave absorption ratio specifically comprises:
when an object is judged to be close to the antenna, performing power backspacing treatment on the transmitting power of the antenna to reduce the absorption ratio of electromagnetic waves;
and when judging that no object is close to the antenna, not performing power back-off processing on the transmitting power of the antenna.
6. An electronic device having a bidirectional directional coupler and an antenna, the bidirectional directional coupler communicatively coupled to the antenna, the electronic device further comprising:
the acquisition module is used for acquiring forward coupling power and reverse coupling power by utilizing coupling of the bidirectional directional coupler;
the calculation module is used for calculating and obtaining the standing-wave ratio of the antenna by utilizing the forward coupling power and the reverse coupling power;
the judging module is used for comparing the standing-wave ratio of the antenna with a preset threshold value and judging whether an object is close to the antenna or not so as to obtain a judging result;
and the control module is used for adjusting the transmitting power of the antenna according to the judgment result so as to control the electromagnetic wave absorption ratio.
7. The electronic device of claim 6, wherein the acquisition module is specifically configured to:
detecting input power and reflected power of an antenna;
and respectively coupling the input power and the reflected power by utilizing a bidirectional directional coupler to obtain forward coupling power and reverse coupling power.
8. The electronic device of claim 6, wherein the computing module is specifically configured to: calculating by utilizing the forward coupling power and the reverse coupling power to obtain a first coefficient;
and calculating by using the first coefficient to obtain the antenna standing wave ratio.
9. The electronic device of claim 6, wherein the determination module is specifically configured to: comparing the antenna standing-wave ratio with a preset threshold value;
when the standing-wave ratio of the antenna is larger than or equal to the preset threshold value, judging that an object approaches the antenna; otherwise, judging that no object is close to the antenna;
or when the standing-wave ratio of the antenna is smaller than or equal to the preset threshold value, judging that an object is close to the antenna; otherwise, judging that no object is close to the antenna.
10. The electronic device of claim 6, wherein the control module is specifically configured to: when an object is judged to be close to the antenna, performing power backspacing treatment on the transmitting power of the antenna to reduce the absorption ratio of electromagnetic waves;
and when judging that no object is close to the antenna, not performing power back-off processing on the transmitting power of the antenna.
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Application publication date: 20200424 |