WO2023061001A1 - Radio-frequency circuit, terminal device control method, terminal device, and storage medium - Google Patents

Abstract

Embodiments of the present application relate to the technical field of antennas, and provide a radio-frequency circuit, a terminal device control method, a terminal device, and a storage medium. The radio-frequency circuit (100) comprises: an antenna group (10) that at least comprises a first antenna (11) and a second antenna (12); a switch circuit (20) that is connected to the first antenna (11); a signal flow direction control circuit (30) that is connected to the second antenna (12); a power distribution module (40) that is connected to the signal flow direction control circuit (30) and the switch circuit (20); and a radio-frequency transceiving module (50) that is connected to the switch circuit (20) and the signal flow direction control circuit (30), wherein when it is detected that an SAR value of any one of the antennas (11, 12) in the antenna group (10) exceeds a standard threshold, the power distribution module (40) adjusts the transmission power of the first antenna (11) and the second antenna (12).

Description

Radio frequency circuit, control method of terminal equipment, terminal equipment and storage medium

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202111189108.6 and a filing date of October 12, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present application relates to the technical field of antennas, and in particular to a radio frequency circuit, a terminal device control method, a terminal device, and a storage medium.

Background technique

With the development of mobile communication technology, people use terminal equipment, especially mobile phones, more and more widely. However, these terminal devices often generate electromagnetic radiation during the communication process. When the terminal device is close to the human body and the electromagnetic radiation power is high, it will cause a certain degree of radiation damage to the human body. The electromagnetic wave absorption ratio (Specific Absorption Rate, SAR) is quantitatively used to measure the degree of influence. Generally, the SAR value of the terminal equipment is used to determine whether the terminal equipment has caused radiation damage to the human body.

Most of the current mainstream methods are to reduce the SAR value of the terminal device by reducing the transmit power of the terminal device or by reducing the radiation efficiency value of the antenna, but at the same time, it will lead to the weakening of the Over-the-Air Technology (OTA) performance of the terminal device. Especially in the small signal scenario, it has a great impact on the user's daily experience.

Contents of the invention

The main purpose of the embodiments of the present application is to provide a radio frequency circuit, a method for controlling a terminal device, a terminal device, and a storage medium.

In the first aspect, the embodiment of the present application provides a radio frequency circuit, the circuit includes: an antenna group, including at least a first antenna and a second antenna; a switch circuit, connected to the first antenna; a signal flow control circuit, connected to the The second antenna is connected; the power distribution module is connected with the signal flow control circuit and the switch circuit; the radio frequency transceiver module is connected with the switch circuit and the signal flow control circuit; wherein, when the antenna is detected When the SAR value of any one of the antennas in the group exceeds a standard threshold, the power distribution module adjusts the transmit power of the first antenna and the second antenna.

In the second aspect, the embodiment of the present application also provides a method for controlling a terminal device, the terminal device includes the radio frequency circuit described in any one of the specifications of this application, and the control method includes: acquiring each antenna of the terminal device the distance from the human body to obtain the working frequency band of the antenna; determine the SAR value corresponding to each of the antennas according to the distance and the working frequency band; when it is detected that the SAR value corresponding to any one of the antennas exceeds the standard threshold, adjust The transmit power of each of the antennas.

In the third aspect, the embodiment of the present application also provides a terminal device, the terminal device includes a processor, a memory, a computer program stored on the memory and executable by the processor, and configured to implement the processing A data bus connecting and communicating between the processor and the memory, wherein when the computer program is executed by the processor, it realizes the steps of the method for controlling a terminal device as described in any one of the descriptions of this application.

In a fourth aspect, the embodiment of the present application further provides a storage medium for computer-readable storage, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors , so as to implement the steps of the terminal device control method described in any one of the descriptions of this application.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic block diagram of a radio frequency circuit provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a radio frequency circuit provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a signal flow control circuit provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a switch circuit and a power distribution module of a radio frequency circuit provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another radio frequency circuit provided by an embodiment of the present application;

FIG. 6a is a schematic structural diagram of another radio frequency circuit provided by the embodiment of the present application;

FIG. 6b is a schematic structural diagram of another radio frequency circuit provided by the embodiment of the present application;

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

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

FIG. 9 is a schematic flowchart of a method for controlling a terminal device provided in an embodiment of the present application;

FIG. 10 is a schematic structural block diagram of another terminal device provided in an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The flow charts shown in the drawings are just illustrations, and do not necessarily include all contents and operations/steps, nor must they be performed in the order described. For example, some operations/steps can be decomposed, combined or partly combined, so the actual order of execution may be changed according to the actual situation.

It should be understood that the terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit the application. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

Embodiments of the present application provide a radio frequency circuit, a method for controlling a terminal device, a terminal device, and a storage medium. Wherein, the radio frequency circuit can be applied to the terminal equipment, and the transmission power of each antenna in the antenna group is adjusted through the power distribution module to reduce the SAR value of the terminal equipment, thereby preventing the terminal equipment from causing radiation damage to the human body.

Please refer to FIG. 1 , which is a schematic structural diagram of a radio frequency circuit provided by an embodiment of the present application.

As shown in FIG. 1 , the radio frequency circuit 100 includes: an antenna group 10 , a switch circuit 20 , a signal flow control circuit 30 , a power distribution module 40 and a radio frequency transceiver module 50 .

Please refer to FIG. 2 at the same time. The antenna group 10 includes at least a first antenna 11 and a second antenna 12. The first antenna 11 is set to transmit signals, and the second antenna 12 is set to receive signals. It should be noted that it can also include multiple antennas. The circuit is set as an antenna for transmitting or receiving signals; the switch circuit 20 is connected with the first antenna 11; the signal flow direction control circuit 30 is connected with the second antenna 12, and is set to distinguish the transmitting signal and the receiving signal of the second antenna 12; the power The distribution module 40 is connected with the signal flow control circuit 30 and the switch circuit 20, and is set to adjust the transmission power of the first antenna 11 and the second antenna 12; the radio frequency transceiver module 50 is connected with the switch circuit 20 and the signal flow control circuit 30, and is set In order to transmit the transmitted signal to the antenna for transmission and receive the signal received by the antenna.

Specifically, the SAR value of each antenna in the antenna group 10 is monitored, and when it is detected that the SAR value of the antenna in the antenna group 10 exceeds the standard threshold, the power distribution module 40 adjusts the transmission of the first antenna 11 and the second antenna 12. power. Wherein, the standard threshold can be set as a preset standard SAR value, which is not specifically limited here, but generally speaking, the standard threshold can be set to an international standard, such as a European standard and an American standard, wherein the European standard is not More than 2w/kg, the American standard is no more than 1.6w/kg, taking the European standard as an example, its specific meaning is: the energy absorbed by electromagnetic waves per kilogram of human tissue should not exceed 2 watts in six minutes.

Exemplarily, the switch circuit 20 may be a circuit composed of multiple switches, specifically, it may be composed of one or more combinations of single pole single throw switches, single pole double throw switches and single pole multiple throw switches.

Exemplarily, the power distributing module 40 may be a power divider, which can divide the energy of one input signal into two or more devices that output equal or unequal energy. Specifically, one input signal may be equally divided into two or more signals or one input signal may be proportionally divided into two or more signals.

Exemplarily, the signal flow direction control circuit 30 may include a circulator or an isolator. For example, the antenna group includes a first antenna 11 and a second antenna 12. When the first antenna 11 is used as a transmitting antenna and the second antenna 12 is used as a receiving antenna, since Now the second antenna 12 plays the role of receiving signals, so the signal corresponding to the second antenna 12 flows to the control circuit 30 and transmits the signal received by the second antenna 12 to the radio frequency transceiver module 50; when the first antenna 11 is used as a transmitting antenna and When the second antenna 12 is also used as a transmitting antenna, since the second antenna 12 plays the role of transmitting signals at this time, the signal corresponding to the second antenna 12 flows to the control circuit 30 to transmit the signal sent by the power distribution module 40 to the second antenna 12 for further processing. Signal emission.

In some embodiments, as shown in FIG. 2 , the radio frequency transceiver module 50 includes a radio frequency transceiver 51 , a first amplifier 52 and a second amplifier 53 , and both the first amplifier 52 and the second amplifier 53 are connected to the radio frequency transceiver 51 . The switch circuit 20 includes a first SPDT switch 21 and a second SPDT switch 22 .

Wherein, the radio frequency transceiver 51 is set to send the transmission signal to the antenna for transmission and receive the signal received by the antenna, and the first amplifier 52 is set corresponding to the first antenna 11, that is, the first amplifier 52 is located in the path of the first antenna 11 , the second amplifier 53 is set correspondingly to the second antenna 12 , that is, the second amplifier 53 is located in the path of the second antenna 12 , and the first amplifier 52 and the second amplifier 53 are respectively connected to the radio frequency transceiver 50 . The first amplifier 52 may be a transmitting amplifier, and the second amplifier 53 may be a receiving amplifier.

Exemplarily, setting the first amplifier 52 to amplify the voltage of the transmission signal can make the power distribution module 40 adjust the transmission power of the first antenna 11 and the second antenna 12 more sensitively and quickly according to the transmission signal. The second amplifier 53 is set to amplify the voltage of the received signal, so that the received signal can be converted into a signal suitable for input by the radio frequency transceiver 51 .

It can be seen in conjunction with FIG. 3 that FIG. 3 is a schematic structural diagram of the signal flow control circuit 30. As shown in FIG. 3, the A port of the signal flow control circuit 30 is connected to the power distribution module 40, and the signal flow control circuit 30. 50 connection, the C port of the signal flow direction control circuit 30 is connected with the second antenna 12; when the second antenna 12 is used as a receiving antenna, the second antenna 12 transmits the received signal to the C port of the signal flow direction control circuit 30, because The unidirectional signal transmission characteristic of the circulator transmits the received signal to the B port of the signal flow control circuit 30, and finally transmits it to the radio frequency transceiver module 50; when the second antenna 12 is used as a transmitting antenna, the power distribution module 40 The sent signal is transmitted to the A port of the signal flow control circuit 30 , due to the unidirectional signal transmission characteristic of the circulator, the signal is transmitted to the C port of the signal flow control circuit 30 , and finally transmitted to the second antenna 12 .

In some embodiments, it can be known with reference to FIG. 4 that FIG. 4 is a schematic structural diagram of a switch circuit and a power distribution module. As shown in FIG. The first moving end 211 of a SPDT switch 21 is connected to the power distribution module 40; the fixed end 220 of the second SPDT switch 22 is connected to the first antenna 11, and the first moving end of the second SPDT switch 22 221 is connected to the second moving end 212 of the first SPDT switch 21 , and the second moving end 222 of the second SPDT switch 22 is connected to the power distribution module 40 .

Specifically, the power distribution module 40 includes an input terminal 41 , a first output terminal 42 and a second output terminal 43 . The input end 41 of the power distribution module 40 is connected to the first moving end 211 of the first SPDT switch 21, the first output end 42 of the power distribution module 40 is connected to the second moving end 222 of the second SPDT switch 22, The second output terminal 43 of the power distribution module 40 is connected to the A port of the signal flow control circuit 30 . Wherein, the first output end 42 is set corresponding to the first antenna 11 , and the second output end 43 is set corresponding to the second antenna 12 . It should be noted that when there are multiple antennas, the power distribution module 40 is correspondingly provided with an output terminal corresponding to each antenna.

Exemplarily, when it is detected that the SAR value of the first antenna in the antenna group does not exceed the standard threshold, the first SPDT switch 21 is placed at the second moving end 212, and the second SPDT switch 22 is placed at the The first moving end 221, thus making the second moving end 212 of the first SPDT switch 21 conduct with the first moving end 221 of the second SPDT switch 22, at this time the transmission path of the radio frequency circuit is the default transmission path , the default transmission path is specifically: radio frequency transceiver 51 - the first amplifier 52 - the fixed end 210 of the first single-pole double-throw switch 21 - the second moving end 212 of the first single-pole double-throw switch 21 - The first moving end 221 of the second SPDT switch 22 —the non-moving end 220 of the second SPDT switch 22 —the first antenna 11 .

Exemplarily, when it is detected that the SAR value of the first antenna in the antenna group does not exceed the standard threshold, the second antenna is set to receive signals at this time, and the receiving path of the radio frequency circuit is specifically: the second antenna 12— —The signal flows to the C port of the control circuit 30 ——The signal flows to the B port of the control circuit 30 ——The second amplifier 53 ——The radio frequency transceiver 51 .

Exemplarily, when it is detected that the SAR value of the first antenna in the antenna group exceeds the standard threshold, the second antenna needs to be set to transmit signals at this time, and the power distribution module 40 needs to transmit signals to the first antenna and the second antenna. Power is adjusted. Therefore the first single pole double throw switch 21 is placed on the first moving end 211, and the second single pole double throw switch 22 is placed on the second moving end 222, thus making the first moving end 211 of the first single pole double throw switch 21 and the second moving end 211 The second moving end 222 of the SPDT switch 22 is turned on through the power distribution module 40 .

At this time, the transmission path of the radio frequency circuit includes a first transmission path and a second transmission path, and the first transmission path is specifically: a radio frequency transceiver 51—a first amplifier 52—a fixed end of the first single-pole double-throw switch 21 210—the first movable terminal 211 of the first SPDT switch 21—the input terminal 41 of the power distribution module 40—the first output terminal 42 of the power distribution module 40—the second terminal of the second SPDT switch 22 The moving end 222 is the second SPDT switch 22 and the non-moving end 220 is the first antenna 11 . The second transmission path is specifically: radio frequency transceiver 51 - the first amplifier 52 - the fixed end 210 of the first single-pole double-throw switch 21 - the first moving end 211 of the first single-pole double-throw switch 21 - The input terminal 41 of the power distribution module 40 —the second output terminal 43 of the power distribution module 40 —the signal flows to the A port of the control circuit 30 —the signal flows to the C port of the control circuit 30 —the second antenna 12 .

In some embodiments, as shown in FIG. 5 , the antenna group may further include a third antenna 13 , and the signal flow control circuit 30 includes a first signal flow control circuit 31 and a second signal flow control circuit 32 . The third antenna 13 is connected to the second signal flow control circuit 32 , the second signal flow control circuit 32 is connected to the third amplifier 54 , and the third amplifier 54 is connected to the radio frequency transmitter 51 . Wherein, the first signal flow direction control circuit 31 is provided correspondingly to the second antenna 12 , and the second signal flow direction control circuit 32 is provided correspondingly to the third antenna 13 .

Specifically, by adding a third output terminal corresponding to the third antenna in the power distribution module 40, the second signal flow direction control circuit 32 is connected to the power distribution module 40 through the third output terminal, and the working principle of the third antenna is the same as that of the first antenna. The working principles of the two antennas are basically similar, and both can transmit and receive signals. When the transmission power of the first antenna and the second antenna is adjusted and the standard threshold is still not met, power allocation can be performed through the third antenna or more antennas so that the SAR value of the antenna is lower than the standard threshold.

In some embodiments, as shown in FIG. 6 a , the switch circuit 20 includes a first SPST switch 23 , a second SPST switch 24 and a third SPST switch 25 . Wherein, one end of the first SPST switch 23 is connected with the first antenna 11, and the other end is connected with the first amplifier 52; one end of the second SPST switch 24 is connected with the first amplifier 52, and the other end is connected with the power distribution module 40 Connection; one end of the third SPST switch 25 is connected to the first antenna 11 , and the other end is connected to the power distribution module 40 , thereby forming the switch circuit 20 .

Exemplarily, when it is detected that the SAR value of the first antenna in the antenna group does not exceed the standard threshold, the first SPST switch 23 is closed, the second SPST switch 24 and the third SPST switch 25 disconnected, at this time the transmission path of the radio frequency circuit is the third transmission path, and the third transmission path is specifically: radio frequency transceiver 51—the first amplifier 52—the first single-pole single-throw switch 23—the first antenna 11 .

Exemplarily, when it is detected that the SAR value of the first antenna in the antenna group does not exceed the standard threshold, the second antenna is set to receive signals at this time, and the receiving path of the radio frequency circuit is specifically: the second antenna 12— —The signal flows to the C port of the control circuit 30 ——The signal flows to the B port of the control circuit 30 ——The second amplifier 53 ——The radio frequency transceiver 51 .

Exemplarily, when it is detected that the SAR value of the first antenna in the antenna group exceeds the standard threshold, the second antenna needs to be set to transmit signals at this time, and the power distribution module 40 needs to transmit signals to the first antenna and the second antenna. Power is adjusted. Therefore, at this time, the first SPST switch 23 is turned off, and the second SPST switch 24 and the third SPST switch 25 are both closed. At this time, the transmission path of the radio frequency circuit includes a fourth transmission path and a fifth transmission path, and the fourth transmission path is specifically: a radio frequency transceiver 51——a first amplifier 52——a second single-pole single-throw switch 24——power distribution The input terminal 41 of the module 40 —the first output terminal 42 of the power distribution module 40 —the third SPST switch 25 —the first antenna 11 . The fifth transmission path is specifically: RF transceiver 51 - first amplifier 52 - second single pole single throw switch 24 - input terminal 41 of power distribution module 40 - second output terminal 43 of power distribution module 40 ——The signal flows to the A port of the control circuit 30 ——The signal flows to the C port of the control circuit 30 ——The second antenna 12 .

In some embodiments, as shown in FIG. 6 b , the switch circuit 20 includes a first SPST switch 23 and a second SPST switch 24 . Wherein, one end of the first SPST switch 23 is connected with the first antenna 11, and the other end is connected with the first amplifier 52; one end of the second SPST switch 24 is connected with the first amplifier 52, and the other end is connected with the power distribution module 40 connected; thereby forming the switching circuit 20. Compared with the switch circuit shown in Figure 6a, its working principle is basically similar, but there is one less single-pole single-throw switch, which reduces the cost. The reason why this can be set is that the power ratio of the first antenna is generally not 0, so the first antenna generally needs to undertake the task of signal transmission, which is equivalent to the third single-pole single-throw switch 25 in Fig. 6a being always on. closed state.

Therefore, the switch circuit arranged as shown in FIG. 6a and FIG. 6b can also realize the technical effect of reducing the SAR value of the antenna by controlling the power distribution module to adjust the power by the switch circuit in the embodiment of the present application.

As shown in Figure 7, the radio frequency circuit 100 also includes a distance sensor 200, the distance sensor 200 includes a first distance sensor 201 and a second distance sensor 202, the first distance sensor 201 is arranged near the first antenna 11, and the second distance sensor 202 It is set close to the second antenna 12 and is set to detect the distance between the first antenna 11 and the second antenna 12 and the human body.

Exemplarily, since the user is generally relatively close to the human body when making a phone call, the first distance sensor 201 and the second distance sensor 202 can be set to detect the distance between the first antenna 11 and the second antenna 12 and the head of the human body, Of course, the distance between the first antenna 11 and the second antenna 12 and other parts of the human body can also be detected.

Exemplarily, since the distance between different positions of the terminal device and the human body is usually different, the first antenna 11 and the second antenna 12 can be set at different positions of the terminal device, thereby passing through the first transmission path and the second transmission path The first antenna and the second antenna are respectively controlled to transmit signals to achieve the effect of reducing the SAR value of the terminal equipment, thereby preventing the terminal equipment from causing radiation damage to the human body.

For example, when a user makes a call, the top of the mobile phone is generally close to the head, and the bottom of the mobile phone is relatively far away from the head. Therefore, the first antenna 11 and the second antenna 12 can be respectively arranged on the top and bottom of the mobile phone, thereby realizing multiple antennas. Power allocation and improve the effect of reducing SAR value.

It should be noted that the number of distance sensors may be determined according to the number of antennas.

In some embodiments, the radio frequency circuit 100 in the embodiment of the present application is applied in a terminal device 1000. As shown in FIG. . Wherein, the radio frequency circuit 100 is connected with the main control unit 300 , the distance sensor 200 is connected with the main control unit 300 , and the radio frequency state detection module 400 is connected with the main control unit 300 and the radio frequency circuit 100 respectively. The radio frequency circuit 100 is set to adjust the transmission power of each antenna in the antenna group; the distance sensor 200 is set to obtain the distance between each antenna and the human body, it should be noted that each antenna is set with a corresponding distance sensor; the main control unit 300 is set to It is set to monitor the SAR value of each antenna, and when it is detected that the SAR value of the antenna in the antenna group 10 exceeds the standard threshold, the switch circuit 20 in the radio frequency circuit 100 is controlled to switch, so that the power distribution module 40 adjusts the first The transmitting power of the antenna 11 and the second antenna 12; the radio frequency state detection module 400 is configured to obtain the working frequency band of each antenna in the terminal device, and send the working frequency band to the main control unit 300 and the radio frequency circuit.

The radio frequency circuit 100 is connected with the main control unit 300, specifically the controlled end of the switch circuit 20 of the radio frequency circuit 100 is connected with the main control unit 300, the controlled end of the power distribution module 40 of the radio frequency circuit 100 is connected with the main control unit 300 and The radio frequency transceiver of the radio frequency circuit 100 is connected with the main control unit 300 . The main control unit 300 is configured to control the switch circuit 20 to be turned on or closed, and to send the power ratio to the power distribution module 40 , and the power distribution module 40 adjusts the transmission power of the first antenna 11 and the second antenna 12 .

Please refer to FIG. 9 , which is a schematic flowchart of a method for controlling a terminal device provided in an embodiment of the present application. The terminal equipment control method is used to control the SAR value of the terminal equipment antenna, and the terminal equipment control method is specifically applied in the main control unit.

As shown in FIG. 9 , the method for controlling a terminal device includes steps S101 to S103.

Step S101, obtaining the distance between each antenna of the terminal device and the human body, and obtaining the working frequency band of the antenna.

Among them, the terminal device is generally equipped with multiple antennas, and the distance between each antenna and the human body at a certain time is obtained through the distance sensor corresponding to each antenna, and at the same time, the working frequency band of each antenna at a certain time is obtained through the radio frequency state detection module.

It should be noted that, since the terminal device only works in the same working frequency band at the same time, the working frequency bands of the antennas obtained at the same time are the same.

In some embodiments, when the distance between one of the antennas and the human body is less than or equal to a preset distance threshold, the working frequency band corresponding to the antenna is obtained. Wherein, the preset distance threshold may be an artificially set distance, which is used to characterize the safe distance between the antenna and the human body, that is, when the distance between the antenna and the human body is less than or equal to the preset distance threshold, it may cause radiation damage to the human body.

Specifically, detecting the distance between each of the antennas and the human body, and determining whether the distance between each of the antennas and the human body is less than or equal to a preset distance threshold; When the distance threshold is reached, the working frequency band corresponding to the antenna is obtained; when each of the antennas is greater than the preset distance threshold, the antenna is controlled to perform signal transmission according to a default transmission path.

Since the closer the distance between the antenna and the human body, the higher the SAR value of the antenna, it is possible to preliminarily determine whether there is a possibility that the SAR value of the antenna exceeds the standard by detecting the distance between each antenna and the human body, thereby saving detection resources. Avoid wasting unnecessary detection computing power. When the distance between one of the antennas and the human body is less than or equal to the preset distance threshold, the working frequency band corresponding to the antenna is obtained, so as to specifically determine whether the SAR value of the antenna exceeds the standard.

Step S202. Determine the SAR value corresponding to each of the antennas according to the distance and the working frequency band.

Wherein, the main control unit can query the first preset correspondence table and the second preset correspondence table according to the working frequency band and the distance, thereby obtaining the SAR value corresponding to each of the antennas, and corresponding to each of the antennas The SAR value is detected.

In some embodiments, the antenna gain corresponding to the antenna is determined according to the working frequency band based on the first preset correspondence table, and the first preset correspondence table records the correspondence between the working frequency band and the antenna gain; A target power value, and determine the omnidirectional radiation power of the antenna according to the antenna gain and the target power value; obtain a second preset correspondence table corresponding to the omnidirectional radiation power; based on the second preset A correspondence table, determining the corresponding SAR value of each antenna according to the distance, and the second preset correspondence table records the correspondence between the distance and the SAR value. In this way, it can be accurately determined whether the SAR value of each antenna satisfies the standard threshold, thereby adjusting the power ratio of each antenna to avoid radiation damage to the human body.

Wherein, the total radiated power (Total Radiated Power, TRP) is obtained by area integrating and averaging the transmitting power of the entire radiating sphere. It reflects the transmission power of the mobile phone, which is related to the transmission power of the mobile phone under conduction and the radiation performance of the antenna. The target power value is the transmit power set by the transmit amplifier, and the first preset correspondence table and the second preset correspondence table are both pre-measured and stored in the main control unit, and are used to determine the antenna gain and The corresponding SAR value of each antenna. It should be noted that different omnidirectional radiation powers correspond to a second preset correspondence table.

Table 1 is the first preset correspondence table

Band name	antenna gain
Band 1	Gain 1(-2dB)
Band 2	Gain 2(-1dB)
...	...

As shown in Table 1, assuming that the obtained working frequency band of the first antenna and the second antenna is frequency band 2, the antenna gains corresponding to the first antenna and the second antenna are both gain 2, that is, -1dB. Obtain the target power value of the transmitting amplifier as 25dBm, then you can calculate the omnidirectional radiation power of the first antenna and the second antenna as 25dBm+(-1dB)=24dBm through the target power value and antenna gain, and then obtain the omnidirectional radiation power as 24dBm A second preset correspondence table corresponding to time, the second preset correspondence table is obtained by measuring each antenna.

Table 2 is the second preset correspondence table when the omnidirectional radiation power is 24dBm

Distance (unit: mm)	SAR value of the first antenna (kg/w)	SAR value of the second antenna (kg/w)
10	1.8	1
8	2.1	1.2
6	2.5	1.5
4	...	...

As shown in Table 2, if the standard threshold is 2kg/w, the distance between the first antenna and the human body is 6mm, and the distance between the second antenna and the human body is 10mm, then the SAR value of the first antenna is 2.5kg/w, which exceeds The standard threshold, while the SAR value of the second antenna is 1kg/w. Since the SAR value of the first antenna exceeds the standard threshold, it is necessary to adjust the transmit power of the first antenna and the second antenna through the power distribution module.

Step S203, when it is detected that the SAR value corresponding to any one of the antennas exceeds a standard threshold, adjust the transmission power of each of the antennas.

Specifically, detect whether the SAR value corresponding to any one antenna exceeds the standard threshold; if it is detected that there is a SAR value corresponding to one antenna that exceeds the standard threshold, adjust the transmit power of each antenna; if it is detected that any one of the antennas corresponds to When none of the SAR values exceeds the standard threshold, the antenna is controlled to perform signal transmission according to a default transmission path.

In some embodiments, the power ratio of each of the antennas is determined according to the SAR value corresponding to each of the antennas; and the transmit power of each of the antennas is adjusted according to the power ratio. In this way, the SAR value corresponding to each antenna can be intelligently calculated to make each antenna meet the power ratio of the standard threshold, and the transmission power of each antenna can be adjusted according to the power ratio, so that the SAR value of each antenna Meet the standard threshold.

For example, if the omnidirectional radiation power is 24dBm, the standard threshold is 2kg/w, the SAR value of the first antenna is 2.5kg/w, and the SAR value of the second antenna is 1kg/w, if only the first antenna is used for signal To transmit, the transmit power corresponding to the first antenna is 24dBm. At this time, the SAR value corresponding to the first antenna is 2.5kg/w, so it is necessary to reduce the transmit power corresponding to the first antenna, and use the remaining transmit power through the second antenna. Signal emission.

It can be seen from the calculation that if the SAR value corresponding to the first antenna needs to be reduced to below 2kg/w, then the transmission power corresponding to the first antenna needs to be below 19.2dBm, then in order not to reduce the total transmission power, the remaining At this time, the SAR value corresponding to the second antenna is 0.2kg/w, so the power ratio between the first antenna and the second antenna is 8:2, but it is necessary to ensure that the SAR value corresponding to the second antenna is not More than 2kg/w, in this embodiment, if the power ratio of the first antenna and the second antenna is 0:10, that is, the signal transmission only through the second antenna will not exceed the standard threshold, so only the first The power ratio of the antenna and the second antenna can be adjusted to be below 8:2.

Because in actual scenarios, the first antenna is generally used as a transmitting antenna, and the second antenna is generally used as a receiving antenna, so the performance of the first antenna is better than that of other antennas, so generally higher power is allocated to the first antenna Therefore, in this embodiment, the power ratio of the first antenna and the second antenna is generally adjusted to 8:2.

It should be noted that if the distance between the first antenna, the second antenna and the human body changes at a certain moment, or the frequency bands of the first antenna and the second antenna change, the power ratio of the first antenna and the second antenna needs to be recalculated , so as to dynamically adjust the power ratio, and can make the SAR value of each antenna meet the standard, will not cause radiation damage to the human body, and keep the omnidirectional radiation power unchanged, thereby ensuring that the OTA performance of the terminal equipment is not affected, and improving the user experience. The user experience of terminal equipment.

The control method of the terminal equipment provided by the above embodiment detects the SAR value of each antenna in the antenna group, and when the SAR value exceeds the standard threshold, adjusts the transmission power of each antenna in the antenna group through the power allocation module, so that not only can Make the SAR value of each antenna meet the standard, will not cause radiation damage to the human body, and at the same time ensure that the OTA performance of the terminal device is not affected, and improve the user's experience with the terminal device.

Referring to FIG. 10 , FIG. 10 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

As shown in FIG. 10 , the terminal device 1000 includes a processor 500 and a memory 600, and the processor 500 and the memory 600 are connected through a bus 700, such as an I2C (Inter-integrated Circuit) bus.

Specifically, the processor 500 is configured to provide calculation and control capabilities to support the operation of the entire terminal device. The processor 301 can be a central processing unit (Central Processing Unit, CPU), and the processor 301 can also be other general processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC) ), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Wherein, the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Specifically, the memory 600 may be a Flash chip, a read-only memory (ROM, Read-Only Memory) disk, an optical disk, a U disk, or a mobile hard disk.

Those skilled in the art can understand that the structure shown in Figure 10 is only a block diagram of a part of the structure related to the embodiment of the application, and does not constitute a limitation on the terminal equipment to which the embodiment of the application is applied. The server may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

Wherein, the processor is configured to run a computer program stored in a memory, and implement any one of the terminal device control methods provided in the embodiments of the present application when executing the computer program.

In one embodiment, the processor is configured to run a computer program stored in the memory, and implement the following steps when executing the computer program:

Obtain the distance between each antenna of the terminal device and the human body, and obtain the working frequency band of the antenna; determine the SAR value corresponding to each of the antennas according to the distance and the working frequency band; when the SAR value corresponding to any one of the antennas is detected When the standard threshold is exceeded, the transmit power of each of the antennas is adjusted.

In an embodiment, when the processor implements the determination of the SAR value corresponding to each of the antennas according to the distance and the frequency band, it is configured to implement: based on the first preset correspondence table, according to the The working frequency band determines the antenna gain corresponding to the antenna, and the first preset correspondence table records the corresponding relationship between the working frequency band and the antenna gain; obtains a target power value, and determines the corresponding antenna gain according to the antenna gain and the target power value the omnidirectional radiation power of the antenna; obtain the second preset correspondence table corresponding to the omnidirectional radiation power; based on the second preset correspondence table, determine the corresponding SAR value of each antenna according to the distance , the second preset correspondence table records correspondences between distances and SAR values.

In an embodiment, when the processor adjusts the transmit power of each of the antennas, it is configured to: determine the power ratio of each of the antennas according to the SAR value corresponding to each of the antennas; The power ratio adjusts the transmission power of each of the antennas.

In an embodiment, the processor is configured to: acquire the working frequency band corresponding to the antenna when the distance between one of the antennas and the human body is less than or equal to a preset distance threshold.

It should be noted that those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the terminal device described above can refer to the corresponding process in the foregoing terminal device control method embodiment, here No longer.

The embodiment of the present application also provides a storage medium for computer-readable storage, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the following: Steps of any terminal device control method provided in the description of the embodiments of the present application.

Wherein, the storage medium may be an internal storage unit of the terminal device described in the foregoing embodiments, such as a hard disk or a memory of the terminal device. The storage medium may also be an external storage device of the terminal device, 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.

The embodiment of the present application provides a radio frequency circuit, a terminal device control method, a terminal device, and a storage medium. The embodiment of the present application detects the SAR value of each antenna in the antenna group, and when the SAR value corresponding to any antenna exceeds the standard threshold , adjust the transmission power of each antenna in the antenna group through the power distribution module, so that not only can the SAR value of each antenna meet the standard, and will not cause radiation damage to the human body, but also ensure that the OTA performance of the terminal equipment is not affected, and improve The user's experience with terminal equipment.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software, firmware, hardware, and an appropriate combination thereof. In hardware embodiments, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit . Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

It should be understood that the term "and/or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments. The above is only a specific embodiment of the application, but the scope of protection of the application is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the scope of the technology disclosed in the application. Modifications or replacements, these modifications or replacements shall be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (11)

1. A radio frequency circuit comprising:

   An antenna group comprising at least a first antenna and a second antenna;

   a switch circuit connected to the first antenna;

   The signal flows to the control circuit, which is connected to the second antenna;

   a power distribution module, connected to the signal flow control circuit and the switch circuit;

   A radio frequency transceiver module, connected to the switch circuit and the signal flow control circuit;

   Wherein, when detecting that the SAR value of any one of the antennas in the antenna group exceeds a standard threshold, the power distribution module adjusts the transmit power of the first antenna and the second antenna.
2. The circuit according to claim 1, wherein the radio frequency transceiver module comprises:

   radio frequency transceiver;

   A first amplifier and a second amplifier, both of the first amplifier and the second amplifier are connected to the radio frequency transceiver.
3. The circuit of claim 2, wherein the switching circuit comprises:

   A first single-pole double-throw switch, the fixed end of the first single-pole double-throw switch is connected to the first amplifier, and the first movable end of the first single-pole double-throw switch is connected to the power distribution module;

   The second single-pole double-throw switch, the fixed end of the second single-pole double-throw switch is connected to the first antenna, and the first movable end of the second single-pole double-throw switch is connected to the first single-pole double-throw switch. The second moving end is connected, and the second moving end of the second single pole double throw switch is connected with the power distribution module.
4. The circuit according to claim 1, wherein the first antenna and the second antenna are arranged at different positions of the terminal device.
5. The circuit according to claim 1, wherein the radio frequency circuit further comprises:

   A first distance sensor and a second distance sensor, the first distance sensor is disposed close to the first antenna, the second distance sensor is disposed close to the second antenna, and is configured to detect the first antenna and the The distance between the second antenna and the human body.
6. A method for controlling a terminal device, wherein the terminal device includes the radio frequency circuit according to any one of claims 1-5, and the control method includes:

   Obtain the distance between each antenna of the terminal device and the human body, and obtain the working frequency band of the antenna;

   determining the SAR value corresponding to each of the antennas according to the distance and the working frequency band;

   When it is detected that the SAR value corresponding to any one of the antennas exceeds the standard threshold, the transmit power of each of the antennas is adjusted.
7. The method according to claim 6, wherein said determining the SAR value corresponding to each of said antennas according to said distance and said frequency band comprises:

   Determine the antenna gain corresponding to the antenna according to the working frequency band based on the first preset correspondence table, where the first preset correspondence table records the correspondence between the working frequency band and the antenna gain;

   Acquiring a target power value, and determining the omnidirectional radiation power of the antenna according to the antenna gain and the target power value;

   Acquiring a second preset correspondence table corresponding to the omnidirectional radiation power;

   Based on the second preset correspondence table, the corresponding SAR value of each of the antennas is determined according to the distance, and the second preset correspondence table records the correspondence between distances and SAR values.
8. The method according to claim 6, wherein said adjusting the transmit power of each of said antennas comprises:

   determining the power ratio of each of the antennas according to the SAR value corresponding to each of the antennas;

   adjusting the transmit power of each of the antennas according to the power ratio.
9. The method according to claim 6, wherein the control method further comprises:

   When the distance between one of the antennas and the human body is less than or equal to the preset distance threshold, the working frequency band corresponding to the antenna is obtained.
10. A terminal device comprising:

    a processor, a memory, a computer program stored on the memory and executable by the processor, and a data bus configured to realize connection communication between the processor and the memory, wherein the computer program is When the processor is executed, the steps of the terminal device control method according to any one of claims 6 to 9 are realized.
11. A storage medium for computer-readable storage, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors, so as to realize the Steps in any one of the terminal device control methods.

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