Radio frequency circuit, control method and device, electronic device and readable storage medium

Abstract

The present application discloses a radio frequency circuit, a control method and device, an electronic device, and a readable storage medium, all belonging to the field of electronic technology. The radio frequency circuit includes: a radio frequency transceiver for outputting a transmit signal and receiving a reflected signal from a load circuit; a power amplifier connected to both the radio frequency transceiver and the load circuit and configured to adjust the signal power of a target transmit signal to obtain a target transmit signal; and a control circuit connected to both the radio frequency transceiver and the power amplifier. The control circuit is configured to determine an operating state of the power amplifier based on the target transmit signal and the reflected signal, and to adjust the transmit power of the power amplifier or the load value of the load circuit when the operating state of the power amplifier is a first operating state, wherein the first operating state is an unstable operating state.

Description

Technical Field

[0001] The present application belongs to the field of electronic technology, and specifically relates to a radio frequency circuit, a control method and device, an electronic device, and a readable storage medium. Background Art

[0002] Radio Frequency Power Amplifiers (RFPAs) play a crucial role in the communication systems of electronic devices. However, RFPAs operate at high power and temperatures, and often require switching hardware paths or operating modes to operate under different operating conditions. These complex operating conditions make RFPAs prone to durability issues such as self-excitation and burnout, reducing their durability and ultimately shortening their service life. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a radio frequency circuit, a control method and device, an electronic device and a readable storage medium, which can improve the durability of a power amplifier and increase the service life of the power amplifier.

[0004] In a first aspect, an embodiment of the present application provides a radio frequency circuit, comprising: a radio frequency transceiver, configured to output a transmit signal and receive a reflected signal from a load circuit; a power amplifier, connected to both the radio frequency transceiver and the load circuit, configured to adjust the signal power of a target transmit signal; and a control circuit, connected to both the radio frequency transceiver and the power amplifier; wherein the control circuit is configured to determine an operating state of the power amplifier based on the target transmit signal and the reflected signal, and to adjust the transmit power of the power amplifier or the load value of the load circuit when the operating state of the power amplifier is a first operating state, wherein the first operating state is an unstable operating state.

[0005] In a second aspect, an embodiment of the present application provides a control method for an electronic device, which includes a radio frequency circuit as in the first aspect, and the control method includes: obtaining a target transmission signal and a reflected signal of the radio frequency circuit; determining the operating state of a power amplifier in the radio frequency circuit based on the target transmission signal and the reflected signal; when the operating state of the power amplifier is a first operating state, adjusting the transmission power of the power amplifier or the load value of the load circuit of the radio frequency circuit, and the first operating state is an unstable operating state.

[0006] In a third aspect, an embodiment of the present application provides a control device for an electronic device, which includes a radio frequency circuit as in the first aspect, and the control device includes: an acquisition unit for acquiring a target transmission signal and a reflected signal of the radio frequency circuit; a processing unit for determining the working state of a power amplifier in the radio frequency circuit based on the target transmission signal and the reflected signal; the processing unit is also used to adjust the transmission power of the power amplifier or the load value of the load circuit of the radio frequency circuit when the working state of the power amplifier is a first working state, and the first working state is an unstable working state.

[0007] In a fourth aspect, an embodiment of the present application provides an electronic device comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the control method of the second aspect are implemented.

[0008] In a fifth aspect, an embodiment of the present application provides a readable storage medium having a program or instruction stored thereon, which implements the steps of the control method of the second aspect when the program or instruction is executed by a processor.

[0009] In the seventh aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the steps of the control method of the second aspect.

[0010] In an eighth aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the steps of the control method of the second aspect.

[0011] The radio frequency circuit provided in an embodiment of the present application includes a radio frequency transceiver, a power amplifier, and a control circuit. The radio frequency transceiver is configured to output a transmit signal and receive a reflected signal from a load circuit. The power amplifier is connected to both the radio frequency transceiver and the load circuit and is configured to adjust the signal power of the transmit signal output by the radio frequency transceiver to obtain a target transmit signal. The control circuit is connected to both the radio frequency transceiver and the power amplifier and is configured to determine the operating state of the power amplifier based on the target transmit signal and the reflected signal, and to adjust the transmit power of the power amplifier or the load value of the load circuit when the operating state of the power amplifier is a first operating state. The first operating state is an unstable operating state.

[0012] That is, the RF circuit provided in the embodiments of the present application determines the operating state of the power amplifier therein based on the target transmit signal and reflected signal generated during operation. When the power amplifier is in an unstable state, i.e., the first operating state, the circuit adjusts the transmit power of the power amplifier or the load value of the load circuit to stabilize the power amplifier, thereby preventing the power amplifier from self-excitation or burning. Thus, when the power amplifier is in an unstable operating state, the circuit promptly adjusts the power amplifier to a stable operating state, thereby improving the durability of the power amplifier, thereby extending the service life of the power amplifier and reducing the cost of using the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural block diagram of the radio frequency circuit provided in an embodiment of the present application;

[0014] Figure 2 A distribution diagram of the working area of ​​the power amplifier provided in an embodiment of the present application;

[0015] Figure 3 A working principle diagram of the phase detector provided in an embodiment of the present application;

[0016] Figure 4 One of the Smith charts provided in the embodiments of the present application;

[0017] Figure 5 One of the Smith charts provided in the embodiments of the present application;

[0018] Figure 6 A flow chart of the control method provided in the embodiment of the present application;

[0019] Figure 7 A structural block diagram of a control device provided in an embodiment of the present application;

[0020] Figure 8 This is one of the hardware structure diagrams of the electronic device provided in the embodiment of the present application;

[0021] Figure 9 The second schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application;

[0022] Figure 10 This is the third schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application.

[0023] in, Figure 1 The accompanying drawings are:

[0024] 100 RF circuit, 102 RF transceiver, 104 power amplifier, 106 control circuit, 108 first power detection circuit, 110 second power detection circuit, 112 phase detection circuit, 114 controller, 116 coupler, 118 first detection circuit, 120 second detection circuit, 122 phase detector, 124 first attenuation network, 126 first frequency divider, 128 first switch, 130 second attenuation network, 132 second frequency divider, 134 second switch, 136 load circuit, 138 filter, 140 RF module, 142 antenna. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0026] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] The radio frequency circuit, control method and device, electronic device and readable storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0029] An embodiment of the first aspect of the present application provides a radio frequency circuit.

[0030] like Figure 1As shown, an embodiment of the present application provides a radio frequency circuit 100 , which includes a radio frequency transceiver 102 , a power amplifier 104 , a control circuit 106 , and a load circuit 136 .

[0031] Among them, the load circuit 136 includes a filter 138, an RF module 140 and an antenna 142 connected in sequence. The first end of the power amplifier 104 is connected to the RF transceiver 102, the second end of the power amplifier 104 is connected to the filter 138 in the load circuit 136, and the third end of the power amplifier 104 is connected to the control circuit 106, and the control circuit 106 is connected to the RF transceiver 102.

[0032] Furthermore, during the use of the RF circuit 100, the RF transceiver 102 is used to output a transmission signal to the power amplifier 104. The power amplifier 104 is used to adjust the signal power of the transmission signal output by the RF transceiver 102 and output the target transmission signal after power adjustment to the load circuit 136. The load circuit 136 then operates according to the received target transmission signal and feeds back a corresponding reflected signal to the RF transceiver 102. The RF transceiver 102 is also used to receive the reflected signal emitted by the load circuit 136.

[0033] Furthermore, during use of the RF circuit 100, the control circuit 106 is configured to determine the operating state of the power amplifier 104 based on the target transmit signal and the reflected signal, and, when the operating state of the power amplifier 104 is a first operating state, adjust the transmit power of the power amplifier 104 or the load value of the load circuit 136. The first operating state is an unstable operating state, that is, in the first operating state, the power amplifier 104 operates in an unstable region.

[0034] It is understandable that during the design process of the RF circuit 100, the front-end load matching of the power amplifier 104, that is, the matching of the load circuit 136, is usually adjusted to ensure that the power amplifier 104 has optimal impedance matching in various operating modes, and the load position, that is, the position of the reflection coefficient of the RF circuit 100 on the Smith chart, so that the power amplifier 104 operates in a stable area.

[0035] However, during the actual use of an electronic device such as a mobile phone where the RF circuit 100 is located, the user often holds the electronic device or places the electronic device close to metal. At this time, the front-end load of the power amplifier 104, that is, the load value of the load circuit 136, will change significantly, and even cause the power amplifier 104 to operate in an unstable area, thereby causing the power amplifier 104 to self-excite or burn out, thereby reducing the durability of the power amplifier 104.

[0036] Among them, such as Figure 2 As shown, the unstable operating region of the power amplifier 104 can be divided into a first unstable region 202 and a second unstable region 204. In actual applications, whether the power amplifier 104 operates in the first unstable region 202 is determined based on the voltage standing wave ratio (VSWR) of the load circuit 136, which is defined as the ratio of the maximum voltage amplitude to the minimum voltage amplitude on the transmission line. Whether the power amplifier 104 operates in the second unstable region 204 is determined based on the load position of the power amplifier 104.

[0037] It is understandable that the voltage standing wave ratio of the load circuit 136 and the load position of the power amplifier 104 are both related to the reflection coefficient of the RF circuit 100, and the reflection coefficient of the RF circuit 100 is related to the target transmission signal and the reflected signal. Therefore, in the RF circuit 100 provided in the embodiment of the present application, the control circuit 106 determines whether the power amplifier 104 is operating in the first unstable region or the second unstable region based on the above-mentioned target transmission signal and the reflected signal, that is, determines the operating state of the power amplifier 104, and when the power amplifier 104 is in the unstable operating state, that is, the first operating state, promptly takes countermeasures such as adjusting the transmission power of the power amplifier 104, adjusting the load value of the load circuit 136, etc., so that the power amplifier 104 operates in the stable region.

[0038] In summary, the RF circuit 100 provided in the embodiment of the present application determines the operating state of the power amplifier 104 therein based on the target transmission signal and the reflected signal generated during operation. When the power amplifier 104 is in an unstable state, i.e., the first operating state, the RF circuit 100 adjusts the transmission power of the power amplifier 104 or the load value of the load circuit 136 to stabilize the power amplifier 104, thereby preventing the power amplifier 104 from self-excitation or burning. In this way, when the power amplifier 104 is in an unstable operating state, the power amplifier 104 is promptly adjusted to a stable operating state for operation, thereby improving the durability of the power amplifier 104, thereby extending the service life of the power amplifier 104 and reducing the cost of using the electronic device.

[0039] In the embodiments of this application, Figure 1 As shown, the RF transceiver 102 includes a first power detection circuit 108 and a second power detection circuit 110 .

[0040] In the operation process of the radio frequency circuit 100 , the first power detection circuit 108 is used to detect the signal power of the target transmission signal, and the second power detection circuit 110 is used to detect the signal power of the reflected signal.

[0041] Furthermore, the control circuit 106 is connected to both the first power detection circuit 108 and the second power detection circuit 110. During operation of the RF circuit 100, the control circuit 106 is configured to determine a power ratio between the target transmitted signal and the reflected signal, and determine an amplitude value of a reflection coefficient between the target transmitted signal and the reflected signal based on the power ratio between the target transmitted signal and the reflected signal.

[0042] In the embodiments of this application, Figure 1 As shown, the control circuit 106 includes a phase detection circuit 112 and a controller 114 .

[0043] Among them, the phase detection circuit 112 is connected to the above-mentioned first power detection circuit 108 and the second power detection circuit 110, and the controller 114 is connected to the third end of the above-mentioned power amplifier 104, the phase detection circuit 112, the first power detection circuit 108 and the second power detection circuit 110.

[0044] During operation of the RF circuit 100, the phase detection circuit 112 is configured to detect a phase difference between a target transmitted signal and a reflected signal. The controller 114 is configured to determine the voltage standing wave ratio (VSWR) of the load circuit 136 and the corresponding position coordinates of the load impedance on the Smith chart based on the power ratio and the phase difference between the target transmitted signal and the reflected signal, and to determine whether the operating state of the power amplifier 104 is a first operating state or a second operating state based on the voltage standing wave ratio (VSWR) of the load circuit 136 and the corresponding position coordinates of the load impedance on the Smith chart. The second operating state is a stable operating state. That is, the controller 114 determines whether the power amplifier 104 is in a stable operating region or an unstable operating region based on the voltage standing wave ratio (VSWR) of the load circuit 136 and the corresponding position coordinates of the load impedance on the Smith chart.

[0045] Specifically, the controller 114 determines a phase value of a reflection coefficient between the target transmitted signal and the reflected signal based on the phase difference between the target transmitted signal and the reflected signal, and determines an amplitude value of the reflection coefficient between the target transmitted signal and the reflected signal based on the power ratio between the target transmitted signal and the reflected signal. Furthermore, the controller 114 determines the reflection coefficient between the target transmitted signal and the reflected signal based on the determined phase value and amplitude value.

[0046] On this basis, controller 114 determines the voltage standing wave ratio (VSWR) of load circuit 136 based on the reflection coefficient between the target transmitted signal and the reflected signal, compares the VSWR with a preset value, and determines whether power amplifier 104 is operating in the first unstable region based on the comparison result. Specifically, if the VSWR is greater than the preset value, power amplifier 104 is determined to be operating in the first unstable region; if the VSWR is less than or equal to the preset value, power amplifier 104 is determined not to be operating in the first unstable region.

[0047] Furthermore, controller 114 determines the position coordinates corresponding to the load impedance on the Smith chart based on the reflection coefficient between the target transmitted signal and the reflected signal, compares the position coordinates with a preset range, and determines whether power amplifier 104 is operating in the second unstable region based on the comparison result. Specifically, if the position coordinates are within the preset range, power amplifier 104 is determined to be operating in the second unstable region; if the position coordinates are outside the preset range, power amplifier 104 is determined not to be operating in the second unstable region.

[0048] In the process of determining the voltage standing wave ratio of the load circuit 136 based on the reflection coefficient, after determining the phase value and amplitude value of the reflection coefficient, the reflection coefficient between the target transmission signal and the reflected signal is expressed in the form of an exponential function as shown in the following formula (1). On this basis, the reflection coefficient is converted into a trigonometric function according to the Euler formula for expression.

[0049]

[0050] Where Γ is the reflection coefficient, V in The target transmits the signal, V refl is the reflected signal, A is the amplitude of the reflection coefficient, is the phase value of the reflection coefficient, and j is an imaginary number.

[0051] Furthermore, the voltage standing wave ratio of the load circuit 136 is related to the modulus of the reflection coefficient. The voltage standing wave ratio can be specifically determined by the following formula (2):

[0052]

[0053] Where VSWR is the voltage standing wave ratio, |Γ| is the modulus of the reflection coefficient Γ, |Γ|∈(0,1), and |Γ| can be determined by the following formula (3):

[0054]

[0055] On this basis, combined with the above formula (2) and formula (3), the voltage standing wave ratio of the load circuit 136 can be specifically determined by the following formula (4):

[0056]

[0057] Furthermore, in the process of determining the position coordinates corresponding to the load impedance in the Smith chart according to the reflection coefficient, as shown in the following formula (5), the reflection coefficient can also be expressed by the load impedance:

[0058]

[0059] Among them, Z L is the load impedance value of the load circuit 136 , and Z0 is a preset impedance value, which is a constant.

[0060] On this basis, normalize formula (5) to obtain the following formula (6):

[0061]

[0062] in, r represents the real coordinate of the position coordinate corresponding to the load impedance in the Smith chart, and x represents the imaginary coordinate of the position coordinate corresponding to the load impedance in the Smith chart.

[0063] On this basis, combined with the above formula (1) and formula (6), the values ​​of r and x can be calculated, as shown in the following formula (7) and formula (8):

[0064]

[0065]

[0066] In addition, in actual application, the user can set the above preset values ​​and preset area ranges according to actual conditions, and no specific restrictions are made here.

[0067] In the embodiments of this application, Figure 1 As shown, the phase detection circuit 112 includes a coupler 116 , a first detection circuit 118 , a second detection circuit 120 , and a phase detector 122 .

[0068] The coupler 116 can be a bidirectional coupler, which is used to obtain the target transmission signal and the reflected signal. The first output of the bidirectional coupler is connected to the input of the first detection circuit 118, which is used to transmit the target transmission signal. The second output of the bidirectional coupler is connected to the input of the second detection circuit 120, which is used to transmit the reflected signal.

[0069] Furthermore, the first output end of the first detection circuit 118 is connected to the input end of the first power detection circuit 108 to detect the signal power of the target transmitted signal through the first power detection circuit 108, and the first output end of the second detection circuit 120 is connected to the input end of the second power detection circuit 110 to detect the signal power of the reflected signal through the second power detection circuit 110.

[0070] Furthermore, the second output terminal of the first detection circuit 118 is connected to the input terminal of the phase detector 122, and the second output terminal of the second detection circuit 120 is connected to the input terminal of the phase detector 122, so that the phase difference between the target transmission signal and the reflected signal can be determined by the phase detector 122. On this basis, the output terminal of the phase detector 122 is connected to the controller 114, so that the controller 114 determines the reflection coefficient between the target transmission signal and the reflected signal based on the phase difference between the target transmission signal and the reflected signal determined by the phase detector 122.

[0071] In the process of determining the phase difference between the target transmission signal and the reflected signal by the phase detector 122, the working principle of the phase detector 122 is as follows: Figure 3 As shown, the output voltage of the phase detector 122 can be specifically expressed by the following formula (9):

[0072] V out =K×θ e (t) (9),

[0073] Among them, V out is the output voltage of the phase detector 122, K is the gain coefficient of the phase detector 122, θ e (t) is the phase difference between the target transmission signal and the reflected signal input to the phase detector 122, θ e (t) = θ1(t) - θ2(t), where θ1(t) is the phase value of the target transmitted signal and θ2(t) is the phase value of the reflected signal.

[0074] On this basis, the above formula (9) is converted as shown in the following formula (10), and the phase difference between the target transmission signal and the reflected signal can be obtained:

[0075]

[0076] In the embodiments of this application, Figure 1 As shown, the first detection circuit 118 includes a first attenuation network 124 , a first frequency divider 126 , and a first switch 128 .

[0077] In which, the input end of the first attenuation network 124 is connected to the first output end of the coupler 116, the first switch 128 can specifically be an SPDT (Single Pole Double Throw) switch, the movable arm of the first switch 128 is connected to the output end of the first attenuation network 124, the first contact of the first switch 128 is connected to the input end of the first power detection circuit 108, the second contact of the first switch 128 is connected to the input end of the first frequency divider 126, and the output end of the first frequency divider 126 is connected to the phase detector 122.

[0078] During operation of RF circuit 100, coupler 116 couples the target transmit signal and inputs it into first attenuation network 124. First attenuation network 124 is used to reduce the amplitude of the target transmit signal to prevent saturation of subsequent devices. The target transmit signal is then transmitted to two paths via first switch 128. One path is connected to first power detection circuit 108 for signal detection, and the other path is connected to phase detector 122 for phase detection.

[0079] At the same time, because the phase detector 122 has a limited phase detection range and cannot operate at higher frequencies, a first frequency divider 126 is provided between the first switch 128 and the phase detector 122 to reduce the frequency of the target transmission signal to 1 / k of the original frequency before inputting it into the phase detector 122 for phase detection. Here, k is the frequency division coefficient of the first frequency divider 126. Users can select different models of first frequency dividers 126 according to actual needs, and this is not specifically limited here.

[0080] Furthermore, if Figure 1 As shown, the second detection circuit 120 includes a second attenuation network 130 , a second frequency divider 132 , and a second switch 134 .

[0081] In which, the input end of the second attenuation network 130 is connected to the second output end of the coupler 116, the second switch 134 can be specifically an SPDT switch, the movable arm of the second switch 134 is connected to the output end of the second attenuation network 130, the first contact of the second switch 134 is connected to the input end of the second power detection circuit 110, the second contact of the second switch 134 is connected to the input end of the second frequency divider 132, and the output end of the second frequency divider 132 is connected to the phase detector 122.

[0082] During operation of RF circuit 100, coupler 116 couples the reflected signal and inputs it into second attenuation network 130, which reduces the magnitude of the reflected signal to prevent saturation of subsequent devices. The reflected signal is then transmitted through second switch 134 to two paths. One path is connected to second power detection circuit 110 to detect the reflected signal, and the other path is connected to phase detector 122 to detect the phase value of the reflected signal.

[0083] Furthermore, because the phase detector 122 has a limited phase detection range and cannot operate at higher frequencies, a second frequency divider 132 is provided between the second switch 134 and the phase detector 122 to reduce the frequency of the reflected signal to 1 / T of the original frequency before inputting it into the phase detector 122 for phase detection. T is the frequency division coefficient of the second frequency divider 132. Users can select different models of second frequency dividers 132 according to actual needs, and this is not specifically limited here.

[0084] The embodiments of the second aspect of the present application provide a control method. The execution subject of the technical solution of the control method provided in the embodiments of the present application can be a control device. The specific execution subject can be determined according to actual use requirements and is not limited by the embodiments of the present application. In order to more clearly describe the control method provided in the embodiments of the present application, the following method embodiments are exemplified by using the control device as the execution subject of the control method.

[0085] like Figure 6 As shown, the embodiment of the present application provides a control method, which may include the following S602 to S606:

[0086] S602: Acquire a target transmission signal and a reflection signal of a radio frequency circuit.

[0087] The control method provided in the present application is used for an electronic device, which includes the radio frequency circuit according to the first aspect.

[0088] Among them, the above-mentioned target transmission signal is the transmission signal emitted by the RF transceiver in the RF circuit after the power is adjusted by the power amplifier, and the above-mentioned reflection signal is the reflection signal fed back by the load circuit in the RF circuit after receiving the target transmission signal.

[0089] S604: Determine the operating state of a power amplifier in the radio frequency circuit according to the target transmitted signal and the reflected signal.

[0090] It is understandable that in the design process of RF circuits, the front-end load matching of the power amplifier, that is, the load circuit matching, is usually adjusted to ensure that the power amplifier has optimal impedance matching in various operating modes, and the load position, that is, the position of the reflection coefficient of the RF circuit on the Smith chart, so that the power amplifier operates in a stable area.

[0091] However, during the actual use of electronic devices where RF circuits are located, such as mobile phones, users often hold the electronic devices or place them close to metal. At this time, the front-end load of the power amplifier, that is, the load value of the load circuit, will change significantly, and even cause the power amplifier to operate in an unstable area, thereby causing the power amplifier to self-excite or burn out, reducing the durability of the power amplifier.

[0092] Among them, such as Figure 2 As shown, the unstable operating region of a power amplifier can be divided into a first unstable region and a second unstable region. In actual applications, determining whether the power amplifier is operating in the first unstable region is related to the voltage standing wave ratio of the load circuit; determining whether the power amplifier is operating in the second unstable region is related to the load position of the power amplifier.

[0093] Furthermore, the voltage standing wave ratio of the load circuit and the load position of the power amplifier are both related to the reflection coefficient of the RF circuit, which in turn is related to the target transmitted signal and the reflected signal. Therefore, in the embodiment of the present application, after obtaining the target transmitted signal and the reflected signal, it is determined whether the power amplifier is operating in the first unstable region or the second unstable region based on the target transmitted signal and the reflected signal.

[0094] Among them, when the power amplifier operates in the first unstable region or the second unstable region, it is determined that the power amplifier is in an unstable working state, that is, the first working state; when the power amplifier operates neither in the first unstable region nor in the second unstable region, it is determined that the power amplifier is in a stable working state, that is, the second working state.

[0095] S606: When the working state of the power amplifier is the first working state, adjust the transmission power of the power amplifier or the load value of the load circuit of the radio frequency circuit.

[0096] The first working state is an unstable working state. In the first working state, the power amplifier operates in the first unstable region or the second unstable region.

[0097] Specifically, when it is determined that the power amplifier is in an unstable working state, that is, the first working state, timely countermeasures are taken, such as adjusting the transmission power of the power amplifier, adjusting the load value of the load circuit, etc., so that the power amplifier operates in a stable area, that is, the working state of the power amplifier is switched from the first working state to the second working state.

[0098] The control method provided in the embodiments of the present application determines the operating state of the power amplifier in the RF circuit based on the target transmit signal and reflected signal generated during operation. When the power amplifier is in an unstable state, i.e., a first operating state, the transmit power of the power amplifier or the load value of the load circuit is adjusted to stabilize the power amplifier, thereby preventing the power amplifier from self-excitation or burning. Thus, when the power amplifier is in an unstable operating state, the power amplifier is promptly adjusted to a stable operating state for operation, thereby improving the durability of the power amplifier, thereby extending its service life and reducing the cost of using the electronic device.

[0099] In the embodiment of the present application, the above S604 may specifically include the following S604a to S604c:

[0100] S604a: Determine the power ratio and phase difference between the target transmitted signal and the reflected signal.

[0101] Specifically, in actual application, the signal powers of the target transmitted signal and the reflected signal are determined, and then the signal powers of the target transmitted signal and the reflected signal are compared to obtain a power ratio between the target transmitted signal and the reflected signal.

[0102] Furthermore, in actual application, the phase values ​​of the target transmitted signal and the reflected signal are determined, and then the phase values ​​of the target transmitted signal and the reflected signal are subtracted to obtain the phase difference between the target transmitted signal and the reflected signal.

[0103] S604b: Determine the reflection coefficient between the target transmitted signal and the reflected signal according to the power ratio and the phase difference.

[0104] Specifically, after determining the power ratio and phase difference between the target transmitted signal and the reflected signal, the amplitude of the reflection coefficient between the target transmitted signal and the reflected signal is determined based on the power ratio, and the phase of the reflection coefficient between the target transmitted signal and the reflected signal is determined based on the phase difference. Based on this, the reflection coefficient between the target transmitted signal and the reflected signal is determined based on the phase and amplitude values ​​determined above.

[0105] S604c: Determine the operating state of the power amplifier according to the reflection coefficient.

[0106] Specifically, after determining the reflection coefficient between the target transmitted signal and the reflected signal, the voltage standing wave ratio of the load circuit in the RF circuit is determined based on the reflection coefficient, and then the voltage standing wave ratio is compared with a preset value, and the working state of the power amplifier is determined based on the comparison result.

[0107] Alternatively, after determining the reflection coefficient between the target transmitted signal and the reflected signal, the position coordinates corresponding to the load impedance in the Smith chart are determined based on the reflection coefficient, and then the position coordinates are compared with the preset area range, and the working state of the power amplifier is determined based on the comparison result.

[0108] In the above-described embodiments provided by this application, when determining the operating state of a power amplifier in a radio frequency circuit based on a target transmitted signal and a reflected signal, the power ratio and phase difference between the target transmitted signal and the reflected signal are determined. The reflection coefficient between the transmitted signal and the reflected signal is then determined based on the power ratio and phase difference, and the operating state of the power amplifier is determined based on the reflection coefficient. This ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0109] In the embodiment of the present application, the above S604c may specifically include the following S604c1 to S604c3:

[0110] S604c1: Determine the voltage standing wave ratio of the load circuit in the radio frequency circuit based on the reflection coefficient.

[0111] Specifically, after determining the phase value and amplitude value of the reflection coefficient, the reflection coefficient between the target transmitted signal and the reflected signal is expressed in the form of an exponential function, as shown in the following formula (1). On this basis, the reflection coefficient is converted into a trigonometric function according to the Euler formula.

[0112]

[0113] Where Γ is the reflection coefficient, V in The target transmits the signal, V refl is the reflected signal, A is the amplitude of the reflection coefficient, is the phase value of the reflection coefficient.

[0114] Furthermore, the voltage standing wave ratio of the load circuit is related to the modulus of the reflection coefficient. The voltage standing wave ratio can be specifically determined by the following formula (2):

[0115]

[0116] Where VSWR is the voltage standing wave ratio, |Γ| is the modulus of the reflection coefficient Γ, |Γ|∈(0,1), and |Γ| can be determined by the following formula (3):

[0117]

[0118] On this basis, combined with the above formula (2) and formula (3), the voltage standing wave ratio of the load circuit can be specifically determined by the following formula (4).

[0119]

[0120] S604c2: When the voltage standing wave ratio is greater than a preset value, determine that the power amplifier is in the first operating state.

[0121] S604c3: When the voltage standing wave ratio is less than or equal to a preset value, determine that the power amplifier is in the second operating state.

[0122] The second working state is a stable working state.

[0123] Specifically, after the voltage standing wave ratio of the load circuit in the radio frequency circuit is determined according to the reflection coefficient, the voltage standing wave ratio is compared with a preset value, and the working state of the power amplifier is determined according to the comparison result.

[0124] Among them, when the voltage standing wave ratio is greater than a preset value, it is determined that the power amplifier is in the first working state, specifically, it is determined that the power amplifier is operating in the first unstable region; and when the voltage standing wave ratio is less than or equal to the preset value, it is determined that the power amplifier is in the second working state, that is, it is determined that the power amplifier is not operating in the first unstable region.

[0125] In addition, in actual application, the specific values ​​of the above preset values ​​can be set by the user according to actual conditions and are not specifically limited here.

[0126] In the above-described embodiment provided by this application, the voltage standing wave ratio (VSWR) of the load circuit in the radio frequency circuit is determined based on the reflection coefficient. When the VSWR is greater than a preset value, the power amplifier is determined to be in the first operating state. When the VSWR is less than or equal to the preset value, the power amplifier is determined to be in the second operating state. In this way, determining the operating state of the power amplifier based on the VSWR of the load circuit ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0127] In the embodiment of the present application, the above S604c may further include the following S604c14 to S604c6:

[0128] S604c4: Determine the position coordinates of the load impedance of the RF circuit in the Smith chart based on the reflection coefficient.

[0129] Specifically, the reflection coefficient can also be expressed by the load impedance:

[0130]

[0131] Among them, Z L is the load impedance value of the load circuit, and Z0 is the preset impedance value, which is a constant.

[0132] On this basis, normalize formula (5) to obtain the following formula (6):

[0133]

[0134] in, r represents the real coordinate of the position coordinate corresponding to the load impedance in the Smith chart, and x represents the imaginary coordinate of the position coordinate corresponding to the load impedance in the Smith chart.

[0135] On this basis, combined with the above formula (1) and formula (6), the values ​​of r and x can be calculated, as shown in the following formula (7) and formula (8).

[0136]

[0137]

[0138] S604c5: When the position coordinates are within the preset area, determine that the power amplifier is in the first working state.

[0139] S604c6: When the position coordinates are outside the preset area, determine that the power amplifier is in the second working state.

[0140] Specifically, after determining the position coordinates corresponding to the load impedance of the radio frequency circuit in the Smith chart according to the reflection coefficient, the position coordinates are compared with a preset area range, and the working state of the power amplifier is determined according to the comparison result.

[0141] Among them, when the position coordinates are within the preset area range, the power amplifier is determined to be in the first working state, specifically, the power amplifier is determined to be working in the second unstable area; when the position coordinates are outside the preset area range, the power amplifier is determined not to be working in the second unstable area, that is, the power amplifier is determined to be in the second working state.

[0142] Exemplarily, when Z0 is 50Ω as described above, the corresponding Smith chart after normalizing the reflection coefficient is as Figure 4 shown. Among them, curve g represents r = 1, curve h represents r = 1.5, curve i represents r = 1.75, curve a represents x = 0.5, curve b represents x = 1, curve c represents x = 1.5, curve d represents x = -0.5, curve e represents x = -1, and curve f represents x = -1.5.

[0143] Based on this, as Figure 5 shown, the region enclosed by curve, curve, curve, and curve is defined as the second non - stable region 204. Among them, curve m represents r = m, curve n represents r = n, curve p represents x = p, and curve q represents x = q. That is, when the position coordinates (r, x) corresponding to the load impedance in the Smith chart satisfy n < r < m and p < x < q, it is determined that the power amplifier operates in the second non - stable region 204.

[0144] In the actual application process, the value range of r above can be 1.5 < r < 1.7, and the value range of x above can be 1.3 < x < 1.5. For the value ranges of r and x above, that is, for the specific range of the above - mentioned preset region, the user can set according to the actual situation, and no specific limitation is made here.

[0145] In the above - mentioned embodiment provided by the present application, the position coordinates corresponding to the load impedance of the radio - frequency circuit are determined according to the reflection coefficient. When the position coordinates are within the preset region range, it is determined that the power amplifier is in the first working state. When the position coordinates are outside the preset region range, it is determined that the power amplifier is in the second working state. In this way, determining the working state of the power amplifier according to the position coordinates corresponding to the load impedance in the Smith chart ensures the accuracy of determining the working state of the power amplifier, and further ensures the accuracy of subsequent control of the operation of the electronic device, improves the durability of the power amplifier, and thus ensures the service life of the power amplifier.

[0146] In the embodiment of the present application, S606 above may specifically include S606a or S606b below:

[0147] S606a: Increase or decrease the transmission power of the power amplifier according to a preset variable.

[0148] Specifically, when it is determined that the power amplifier is in the non - stable working state, that is, the above - mentioned first working state, increase or decrease the transmission power of the above - mentioned power amplifier according to a preset variable to adjust the working state of the power amplifier to the stable working state, that is, the above - mentioned second working state.

[0149] Among them, the above-mentioned preset variables can specifically be 2dB, 3dB, 4dB, etc. As for the specific values ​​of the above-mentioned preset variables, those skilled in the art can set them according to actual conditions, and no specific restrictions are made here.

[0150] S606b: Control the electronic device to send an alert to the user, prompting the user to adjust the way of holding the electronic device or adjust the position of the electronic device to adjust the load value of the load circuit of the radio frequency circuit.

[0151] It is understandable that during the actual use of electronic devices where RF circuits are located, such as mobile phones, users often hold the electronic devices or place them close to metal. At this time, the front-end load of the power amplifier, that is, the load value of the load circuit, will change significantly, and even cause the power amplifier to operate in an unstable area, thereby causing the power amplifier to self-excite or burn out, reducing the durability of the power amplifier.

[0152] Therefore, in the control method provided in the embodiment of the present application, when it is determined that the power amplifier is in an unstable working state, that is, the above-mentioned first working state, the electronic device can also be controlled to send an alarm to the user to prompt the user to adjust the way of holding the electronic device or adjust the position of the electronic device so that the electronic device is away from metal and not surrounded by human hands, thereby adjusting the load value of the load circuit of the radio frequency circuit to adjust the working state of the power amplifier to a stable working state, that is, the above-mentioned second working state.

[0153] Among them, when controlling the electronic device to send an alarm to the user, the alarm can be sent to the user through motor vibration, text message prompts, etc., and no specific restrictions are made here.

[0154] In the above embodiment provided by the present application, when it is determined that the power amplifier is in an unstable working state, that is, the above-mentioned first working state, the transmit power of the power amplifier is increased or decreased according to a preset variable. Alternatively, the electronic device is controlled to send an alarm to the user, prompting the user to adjust the way the electronic device is held or the position of the electronic device to adjust the load value of the load circuit of the radio frequency circuit. In this way, when the power amplifier is in an unstable working state, the transmit power of the power amplifier or the load value of the load circuit is adjusted in time to adjust the power amplifier to a stable working state for operation, thereby improving the durability of the power amplifier, thereby extending the service life of the power amplifier and reducing the use cost of the electronic device.

[0155] The control method provided in the embodiment of the second aspect of the present application can be executed by a control device. In the embodiment of the present application, the control device provided in the embodiment of the third aspect of the present application is described by taking the control device executing the above control method as an example.

[0156] like Figure 7 As shown, an embodiment of the present application provides a control device 700, which may include the following acquisition unit 702 and processing unit 704.

[0157] An acquisition unit 702 is configured to acquire a target transmission signal and a reflected signal of a radio frequency circuit;

[0158] a processing unit 704, configured to determine an operating state of a power amplifier in a radio frequency circuit according to the target transmitted signal and the reflected signal;

[0159] The processing unit 704 is further configured to adjust the transmit power of the power amplifier or the load value of the load circuit of the radio frequency circuit when the working state of the power amplifier is a first working state, and the first working state is an unstable working state.

[0160] The control device 700 provided in the embodiment of the present application determines the operating state of the power amplifier therein based on the target transmission signal and the reflected signal generated during the operation of the radio frequency circuit. When the power amplifier is in an unstable state, i.e., a first operating state, the transmit power of the power amplifier or the load value of the load circuit is adjusted to stabilize the power amplifier, thereby preventing the power amplifier from self-excitation or burning. In this way, when the power amplifier is in an unstable operating state, the power amplifier is promptly adjusted to a stable operating state for operation, thereby improving the durability of the power amplifier, thereby extending the service life of the power amplifier and reducing the cost of using the electronic device.

[0161] In an embodiment of the present application, the processing unit 704 is specifically used to: determine the power ratio and phase difference between the target transmitted signal and the reflected signal; determine the reflection coefficient between the target transmitted signal and the reflected signal based on the power ratio and phase difference; and determine the working state of the power amplifier based on the reflection coefficient.

[0162] In the above-described embodiments provided by this application, when determining the operating state of a power amplifier in a radio frequency circuit based on a target transmitted signal and a reflected signal, the power ratio and phase difference between the target transmitted signal and the reflected signal are determined. The reflection coefficient between the transmitted signal and the reflected signal is then determined based on the power ratio and phase difference, and the operating state of the power amplifier is determined based on the reflection coefficient. This ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0163] In an embodiment of the present application, the processing unit 704 is specifically used to: determine the voltage standing wave ratio of the load circuit in the radio frequency circuit based on the reflection coefficient; when the voltage standing wave ratio is greater than a preset value, determine that the power amplifier is in a first working state; when the voltage standing wave ratio is less than or equal to the preset value, determine that the power amplifier is in a second working state, and the second working state is a stable working state.

[0164] In the above-described embodiment provided by this application, the voltage standing wave ratio (VSWR) of the load circuit in the radio frequency circuit is determined based on the reflection coefficient. When the VSWR is greater than a preset value, the power amplifier is determined to be in the first operating state. When the VSWR is less than or equal to the preset value, the power amplifier is determined to be in the second operating state. In this way, determining the operating state of the power amplifier based on the VSWR of the load circuit ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0165] In an embodiment of the present application, the processing unit 704 is specifically used to: determine the position coordinates corresponding to the load impedance of the RF circuit in the Smith chart based on the reflection coefficient; when the position coordinates are within a preset area range, determine that the power amplifier is in a first working state; when the position coordinates are outside the preset area range, determine that the power amplifier is in a second working state.

[0166] In the above-described embodiment provided by the present application, the position coordinates corresponding to the load impedance of the RF circuit on the Smith chart are determined based on the reflection coefficient. If the position coordinates are within a preset range, the power amplifier is determined to be in a first operating state. If the position coordinates are outside the preset range, the power amplifier is determined to be in a second operating state. In this way, determining the operating state of the power amplifier based on the position coordinates corresponding to the load impedance on the Smith chart ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0167] In an embodiment of the present application, the processing unit 704 is specifically used to: increase or decrease the transmission power of the power amplifier according to a preset variable; or control the electronic device to send an alarm to the user, prompting the user to adjust the way of holding the electronic device or adjust the position of the electronic device to adjust the load value of the load circuit of the radio frequency circuit.

[0168] In the above embodiment provided by the present application, when it is determined that the power amplifier is in an unstable working state, that is, the above-mentioned first working state, the transmit power of the power amplifier is increased or decreased according to a preset variable. Alternatively, the electronic device is controlled to send an alarm to the user, prompting the user to adjust the way the electronic device is held or the position of the electronic device to adjust the load value of the load circuit of the radio frequency circuit. In this way, when the power amplifier is in an unstable working state, the transmit power of the power amplifier or the load value of the load circuit is adjusted in time to adjust the power amplifier to a stable working state for operation, thereby improving the durability of the power amplifier, thereby extending the service life of the power amplifier and reducing the use cost of the electronic device.

[0169] The control device 700 in the embodiment of the present application can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices other than a terminal. For example, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), etc. It can also be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., and the embodiment of the present application does not specifically limit it.

[0170] The control device 700 in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0171] The control device 700 provided in the third embodiment of the present application can achieve Figure 6 To avoid repetition, the various processes implemented in the method embodiment are not described here.

[0172] Alternatively, as Figure 8As shown, the embodiment of the present application further provides an electronic device 800, which includes the radio frequency circuit 100 of the first aspect. Therefore, the electronic device 800 has all the beneficial effects of the radio frequency circuit 100 of the first aspect, which will not be described in detail here.

[0173] Alternatively, as Figure 9 As shown, an embodiment of the present application further provides an electronic device 900, including a processor 902 and a memory 904, wherein the memory 904 stores a program or instruction that can be run on the processor 902, and when the program or instruction is executed by the processor 902, the various steps of the control method embodiment of the second aspect mentioned above are implemented, and the same technical effect can be achieved. To avoid repetition, they will not be repeated here.

[0174] It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

[0175] Figure 10 A schematic diagram of the hardware structure of an electronic device implementing an embodiment of the present application.

[0176] The electronic device 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009 and a processor 1010.

[0177] Those skilled in the art will understand that the electronic device 1000 may also include a power source (such as a battery) to power each component, and the power source may be logically connected to the processor 1010 through a power management system, thereby realizing functions such as management control, discharge, and power consumption management through the power management system. Figure 10 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be repeated here.

[0178] The electronic device 1000 of the embodiment of the present application can be used to implement the various steps of the embodiment of the control method of the second aspect described above.

[0179] The processor 1010 is configured to obtain a target transmission signal and a reflection signal of a radio frequency circuit.

[0180] The processor 1010 is further configured to determine the operating state of a power amplifier in the radio frequency circuit according to the target transmitted signal and the reflected signal.

[0181] The processor 1010 is further configured to adjust the transmit power of the power amplifier or the load value of the load circuit of the radio frequency circuit when the operating state of the power amplifier is a first operating state, where the first operating state is an unstable operating state.

[0182] In an embodiment of the present application, the operating state of a power amplifier is determined based on a target transmit signal and a reflected signal generated during operation of the radio frequency circuit. When the power amplifier is in an unstable state, i.e., a first operating state, the transmit power of the power amplifier or the load value of the load circuit is adjusted to stabilize the power amplifier, thereby preventing the power amplifier from self-excitation or burning. Thus, when the power amplifier is in an unstable operating state, the power amplifier is promptly adjusted to a stable operating state for operation, thereby improving the durability of the power amplifier, thereby extending the service life of the power amplifier and reducing the cost of using the electronic device.

[0183] Optionally, the processor 1010 is specifically used to: determine the power ratio and phase difference between the target transmitted signal and the reflected signal; determine the reflection coefficient between the target transmitted signal and the reflected signal based on the power ratio and phase difference; and determine the working state of the power amplifier based on the reflection coefficient.

[0184] In the above-described embodiments provided by this application, when determining the operating state of a power amplifier in a radio frequency circuit based on a target transmitted signal and a reflected signal, the power ratio and phase difference between the target transmitted signal and the reflected signal are determined. The reflection coefficient between the transmitted signal and the reflected signal is then determined based on the power ratio and phase difference, and the operating state of the power amplifier is determined based on the reflection coefficient. This ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0185] Optionally, the processor 1010 is specifically used to: determine the voltage standing wave ratio of the load circuit in the radio frequency circuit based on the reflection coefficient; when the voltage standing wave ratio is greater than a preset value, determine that the power amplifier is in a first working state; when the voltage standing wave ratio is less than or equal to a preset value, determine that the power amplifier is in a second working state, and the second working state is a stable working state.

[0186] In the above-described embodiment provided by this application, the voltage standing wave ratio (VSWR) of the load circuit in the radio frequency circuit is determined based on the reflection coefficient. When the VSWR is greater than a preset value, the power amplifier is determined to be in the first operating state. When the VSWR is less than or equal to the preset value, the power amplifier is determined to be in the second operating state. In this way, determining the operating state of the power amplifier based on the VSWR of the load circuit ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0187] Optionally, the processor 1010 is specifically used to: determine the position coordinates corresponding to the load impedance of the RF circuit in the Smith chart based on the reflection coefficient; when the position coordinates are within a preset area range, determine that the power amplifier is in a first working state; when the position coordinates are outside the preset area range, determine that the power amplifier is in a second working state.

[0188] In the above-described embodiment provided by the present application, the position coordinates corresponding to the load impedance of the RF circuit on the Smith chart are determined based on the reflection coefficient. If the position coordinates are within a preset range, the power amplifier is determined to be in a first operating state. If the position coordinates are outside the preset range, the power amplifier is determined to be in a second operating state. In this way, determining the operating state of the power amplifier based on the position coordinates corresponding to the load impedance on the Smith chart ensures the accuracy of the determination of the operating state of the power amplifier, thereby ensuring the accuracy of subsequent control of the electronic device's operation, improving the durability of the power amplifier, and thus ensuring the service life of the power amplifier.

[0189] Optionally, the processor 1010 is specifically used to: increase or decrease the transmission power of the power amplifier according to a preset variable; or control the electronic device to send an alarm to the user, prompting the user to adjust the way of holding the electronic device or adjust the position of the electronic device to adjust the load value of the load circuit of the radio frequency circuit.

[0190] In the above embodiment provided by the present application, when it is determined that the power amplifier is in an unstable working state, that is, the above-mentioned first working state, the transmit power of the power amplifier is increased or decreased according to a preset variable. Alternatively, the electronic device is controlled to send an alarm to the user, prompting the user to adjust the way the electronic device is held or the position of the electronic device to adjust the load value of the load circuit of the radio frequency circuit. In this way, when the power amplifier is in an unstable working state, the transmit power of the power amplifier or the load value of the load circuit is adjusted in time to adjust the power amplifier to a stable working state for operation, thereby improving the durability of the power amplifier, thereby extending the service life of the power amplifier and reducing the use cost of the electronic device.

[0191] It should be understood that in an embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processor 10041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0192] The memory 1009 can be used to store software programs and various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1009 may include volatile memory or non-volatile memory, or the memory 1009 may include both volatile and non-volatile memory.

[0193] Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0194] Processor 1010 may include one or more processing units. Optionally, processor 1010 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1010.

[0195] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned second aspect control method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0196] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0197] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned second aspect of the control method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0198] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0199] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the control method embodiment of the second aspect mentioned above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0200] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0201] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0202] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A radio frequency circuit, characterized in that: include: A radio frequency transceiver, configured to output a transmit signal and receive a reflected signal from a load circuit; a power amplifier, connected to both the RF transceiver and the load circuit, and configured to adjust the signal power of the transmit signal to obtain a target transmit signal; a control circuit connected to both the radio frequency transceiver and the power amplifier; The control circuit is configured to determine an operating state of the power amplifier according to the target transmission signal and the reflected signal, and adjust the transmission power of the power amplifier or the load value of the load circuit when the operating state of the power amplifier is a first operating state, wherein the first operating state is an unstable operating state; The control circuit is specifically used to: determine the position coordinates corresponding to the voltage standing wave ratio and load impedance of the load circuit in the Smith chart based on the reflection coefficient between the target transmission signal and the reflected signal; determine that the power amplifier is operating in the first unstable region when the voltage standing wave ratio is greater than a preset value; determine that the power amplifier is operating in the second unstable region when the position coordinate is within the preset region range; and determine that the power amplifier is in the first unstable region or the second unstable region when the power amplifier is operating in the first unstable region or the second unstable region.

2. The radio frequency circuit according to claim 1, wherein: The radio frequency transceiver comprises: A first power detection circuit, configured to detect the power of the target transmission signal; a second power detection circuit, configured to detect the power of the reflected signal; The control circuit is connected to the first power detection circuit and the second power detection circuit, and is used to determine the power ratio of the target transmission signal to the reflected signal.

3. The radio frequency circuit according to claim 2, characterized in that: The control circuit comprises: a phase detection circuit, connected to the first power detection circuit and the second power detection circuit, for detecting a phase difference between the target transmitted signal and the reflected signal; a controller connected to the power amplifier, the phase detection circuit, the first power detection circuit, and the second power detection circuit; The controller is used to determine the position coordinates corresponding to the voltage standing wave ratio and the load impedance of the load circuit in the Smith chart based on the power ratio and the phase difference, and determine that the operating state of the power amplifier is the first operating state or the second operating state based on the voltage standing wave ratio and the position coordinates, and the second operating state is a stable operating state.

4. The radio frequency circuit according to claim 3, characterized in that: The phase detection circuit comprises: a coupler, configured to obtain the target transmitted signal and the reflected signal; a first detection circuit, wherein an input end of the first detection circuit is connected to the coupler, and a first output end of the first detection circuit is connected to an input end of the first power detection circuit; a second detection circuit, wherein an input end of the second detection circuit is connected to the coupler, and a first output end of the second detection circuit is connected to an input end of the second power detection circuit; A phase detector, wherein the input end of the phase detector is connected to the second output end of the first detection circuit and the second output end of the second detection circuit, the output end of the phase detector is connected to the controller, and the phase detector is used to determine the phase difference value.

5. The radio frequency circuit according to claim 4, characterized in that: The first detection circuit includes: a first attenuation network, wherein an input end of the first attenuation network is connected to the coupler; a first frequency divider, wherein an output end of the first frequency divider is connected to the phase detector; a first switch, wherein a first contact of the first switch is connected to an input terminal of the first power detection circuit, a second contact of the first switch is connected to an input terminal of the first frequency divider, and a movable arm of the first switch is connected to an output terminal of the first attenuation network; The second detection circuit includes: a second attenuation network, wherein an input end of the second attenuation network is connected to the coupler; a second frequency divider, wherein an output end of the second frequency divider is connected to the phase detector; A second switch, wherein a first contact of the second switch is connected to the input end of the second power detection circuit, a second contact of the second switch is connected to the input end of the second frequency divider, and a movable arm of the second switch is connected to the output end of the second attenuation network.

6. A control method, characterized in that: For an electronic device, the electronic device includes the radio frequency circuit according to any one of claims 1 to 5, and the control method includes: Acquiring a target transmission signal and a reflection signal of the radio frequency circuit; determining an operating state of a power amplifier in the radio frequency circuit according to the target transmitted signal and the reflected signal; When the operating state of the power amplifier is a first operating state, adjusting the transmit power of the power amplifier or the load value of the load circuit of the radio frequency circuit, wherein the first operating state is an unstable operating state; Determining corresponding position coordinates of the voltage standing wave ratio and the load impedance of the load circuit in a Smith chart according to a reflection coefficient between the target transmitted signal and the reflected signal; When the voltage standing wave ratio is greater than a preset value, determining that the power amplifier operates in a first unstable region; When the position coordinates are within a preset area, determining that the power amplifier operates in a second unstable area; When the power amplifier operates in the first unstable region or the second unstable region, it is determined that the power amplifier is in the first operating state.

7. The control method according to claim 6, characterized in that: The determining the operating state of the power amplifier in the radio frequency circuit according to the target transmitted signal and the reflected signal includes: Determining a power ratio and a phase difference between the target transmitted signal and the reflected signal; Determine a reflection coefficient between the target transmitted signal and the reflected signal according to the power ratio and the phase difference; The operating state of the power amplifier is determined according to the reflection coefficient.

8. The control method according to claim 7, characterized in that: The determining the operating state of the power amplifier according to the reflection coefficient includes: determining a voltage standing wave ratio of a load circuit in the radio frequency circuit according to the reflection coefficient; When the voltage standing wave ratio is greater than a preset value, determining that the power amplifier is in the first working state; When the voltage standing wave ratio is less than or equal to the preset value, it is determined that the power amplifier is in a second working state, and the second working state is a stable working state.

9. The control method according to claim 7, characterized in that: The determining the operating state of the power amplifier according to the reflection coefficient includes: Determine the position coordinates corresponding to the load impedance of the radio frequency circuit in the Smith chart according to the reflection coefficient; When the position coordinates are within a preset area, determining that the power amplifier is in the first working state; When the position coordinates are outside the preset area, it is determined that the power amplifier is in the second working state.

10. The control method according to claim 8 or 9, characterized in that: The adjusting the transmit power of the power amplifier or the load value of the load circuit of the radio frequency circuit includes: increasing or decreasing the transmit power of the power amplifier according to a preset variable; Alternatively, the electronic device is controlled to send an alert to the user, prompting the user to adjust the way of holding the electronic device or adjust the position of the electronic device to adjust the load value of the load circuit of the radio frequency circuit.

11. A control device, characterized in that: Used in an electronic device, the electronic device comprising the radio frequency circuit according to any one of claims 1 to 5, the control device comprising: an acquisition unit, configured to acquire a target transmission signal and a reflection signal of the radio frequency circuit; a processing unit, configured to determine an operating state of a power amplifier in the radio frequency circuit according to the target transmitted signal and the reflected signal; The processing unit is further configured to adjust the transmit power of the power amplifier or the load value of the load circuit of the radio frequency circuit when the operating state of the power amplifier is a first operating state, wherein the first operating state is an unstable operating state; Determining corresponding position coordinates of the voltage standing wave ratio and the load impedance of the load circuit in a Smith chart according to a reflection coefficient between the target transmitted signal and the reflected signal; When the voltage standing wave ratio is greater than a preset value, determining that the power amplifier operates in a first unstable region; When the position coordinates are within a preset area, determining that the power amplifier operates in a second unstable area; When the power amplifier operates in the first unstable region or the second unstable region, it is determined that the power amplifier is in the first operating state.

12. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the control method according to any one of claims 6 to 10 are implemented.

13. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the control method according to any one of claims 6 to 10 are implemented.

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