Power detection circuit and driving method, printed circuit board, and terminal equipment

Abstract

The embodiments of the present application provide a power detection circuit and a driving method, a printed circuit board, and a terminal device, which relate to the field of wireless radio frequency technology and are used to solve the problem of a large number of radio frequency test sockets on a printed circuit board. The power detection circuit includes: the first port of the first radio frequency channel of the first radio frequency module and the first port of the first coupling channel are coupled to the first connection end, and the first connection end is also coupled to multiple test points. The first ports of the multiple second radio frequency channels of the second radio frequency module are coupled to each second connection end. Multiple radio frequency test sockets are coupled correspondingly to the multiple second connection ends. The test receiver is used to measure the power of the first coupling channel. A first multi-pole multi-throw switch, multiple first moving ends are coupled correspondingly to the second ports of multiple first radio frequency channels, the second port of the first coupling channel, and the second ports of multiple second radio frequency channels, and multiple first fixed ends are coupled correspondingly to the second ports of multiple second radio frequency channels and the test receiver.

Description

Technical Field

[0001] The present application relates to the field of wireless radio frequency technology, and in particular to a power detection circuit and driving method, a printed circuit board, and a terminal device. Background Art

[0002] With the rapid development of terminal technology, terminal devices are becoming increasingly popular and indispensable in people's lives. People use them for learning, entertainment, and other purposes. Before leaving the factory, terminal devices must undergo RF testing to verify that their RF performance meets requirements. Only when these performance requirements are met can they be sold to users.

[0003] Currently, a radio frequency test socket is installed on the printed circuit board (PCB) in the terminal device, and the test equipment uses the radio frequency test socket to test the radio frequency performance of the terminal device. However, with the popularization of 4G and 5G communication technologies, there are more and more radio frequency channels in the terminal equipment, resulting in an increase in the number of radio frequency test sockets used for radio frequency channel calibration tests. For example, the number of radio frequency test sockets in some terminal devices can reach more than ten. However, the radio frequency test socket occupies a large area and is relatively expensive, and most of the radio frequency test sockets are only used for calibration tests and no longer play any role after the product is sold to the user. Therefore, the existence of the radio frequency test socket will increase the area of ​​the PCB to a certain extent, and increase the cost of the product. Summary of the Invention

[0004] The embodiments of the present application provide a power detection circuit and driving method, a printed circuit board, and a terminal device, which are used to solve the problem of a large number of radio frequency test sockets on a printed circuit board.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] According to a first aspect of an embodiment of the present application, a power detection circuit is provided, comprising: a first RF module, comprising a plurality of first RF channels, a first coupling channel, and a first connection end; the first port of the first RF channel and the first port of the first coupling channel are coupled to the first connection end, and the first connection end is also coupled to a plurality of test points; a second RF module, comprising a plurality of second RF channels and a plurality of second connection ends; the first ports of the plurality of second RF channels are coupled to each second connection end; a plurality of RF test sockets, and the plurality of RF test sockets are coupled correspondingly to the plurality of second connection ends; a test receiver for measuring the power of the first coupling channel; a first multi-pole multi-throw switch, comprising a plurality of first movable ends and a plurality of first fixed ends; the plurality of first movable ends are coupled correspondingly to the second ports of the plurality of first RF channels, the second port of the first coupling channel, and the second ports of the plurality of second RF channels, and the plurality of first fixed ends are coupled correspondingly to the second ports of the plurality of second RF channels and the test receiver.

[0007] The embodiment of the present application forms a path between the channel in the first RF module and the channel in the second RF module by omitting the RF test socket coupled to the first RF module. The calibration test of the channel in the first RF module is completed by using the test capability of the test receiver and the RF test socket coupled to the second RF module. In other words, the power detection circuit provided in the embodiment of the present application, although the RF test socket corresponding to the first RF module is deleted, it can still perform a calibration test on the RF channel in the first RF module. Therefore, compared with the related art, the power detection circuit provided in the embodiment of the present application can delete part of the RF test socket, save PCB layout area, and improve the utilization rate of the PCB of the terminal device, without covering up the RF problems of certain channels or sacrificing the power accuracy performance of certain channels. Therefore, the power detection circuit provided in the embodiment of the present application can meet the needs of reducing the device occupied area without deleting functional devices and without losing RF performance when the PCB layout area of ​​the terminal device is tight.

[0008] Optionally, the first RF module is a low-frequency RF module relative to the second RF module. In this way, since the RF module that is not equipped with a corresponding RF test socket needs to be calibrated through the RF module that is equipped with a corresponding RF test socket, and the low-frequency band signal can pass through the high-frequency band RF module, but the high-frequency band signal must pass through the low-frequency band RF module, the performance requirements of the components in the low-frequency band RF module are relatively high. Therefore, the second RF module is equipped with a corresponding RF test socket, and the second RF module is limited to a medium- and high-frequency band RF module. This can avoid the problem that the medium- and high-frequency band signals cannot pass through the second single-pole multi-throw switch due to the performance of the second single-pole multi-throw switch in the first RF module not meeting the requirements, and the problem of being unable to complete the calibration of the RF channel in the second RF module can be avoided, thereby reducing the requirements for the second single-pole multi-throw switch.

[0009] Optionally, the power detection circuit further includes a first single-pole multi-throw switch; the first single-pole multi-throw switch includes a plurality of second movable terminals and second fixed terminals, the second fixed terminals being coupled to the first connection terminal, and the plurality of second movable terminals being coupled to the plurality of test points. In this manner, the first RF module may include only one first connection terminal, simplifying the port structure of the first RF module.

[0010] Optionally, the first RF module includes a first coupler, a second single-pole multi-throw switch and multiple first power amplifiers; the first coupler is coupled to the first connecting end and the first moving end to form a first coupling channel; the third fixed end of the second single-pole multi-throw switch is coupled to the first connecting end, and the multiple third moving ends of the second single-pole multi-throw switch are coupled to the multiple first power amplifiers and the first moving end to form multiple first RF channels.

[0011] Optionally, the second RF module includes a second multi-pole multi-throw switch and multiple second power amplifiers; the multiple fourth fixed ends of the second multi-pole multi-throw switch are coupled correspondingly to the multiple second connection ends, and the multiple fourth movable ends of the second multi-pole multi-throw switch are coupled to the multiple second power amplifiers and the first fixed end to form multiple second RF channels.

[0012] Optionally, the second RF module also includes multiple second couplers and a third single-pole multi-throw switch; the multiple second couplers are coupled to the multiple second connection ends and are also coupled to the multiple fifth moving ends of the third single-pole multi-throw switch; the first multi-pole multi-throw switch also includes a first moving end that is separately coupled to the fifth fixed end of the third single-pole multi-throw switch.

[0013] Optionally, the power detection circuit further includes a detection auxiliary module, which is coupled to the test point and the load and is used to connect the load to the test point.

[0014] Optionally, the detection auxiliary module includes an inductor, a capacitor and an antenna shrapnel; one end of the inductor is coupled to the test point, and the other end of the inductor is coupled to the reference ground; one end of the capacitor is coupled to the test point, and the other end of the capacitor is coupled to the antenna shrapnel; the antenna shrapnel is used to couple to the load.

[0015] Optionally, the power detection circuit further includes a radio frequency integrated circuit, and the test receiver is integrated into the radio frequency integrated circuit.

[0016] According to a second aspect of an embodiment of the present application, a printed circuit board is provided, comprising: a circuit board body and the power detection circuit of any one of the first aspects; the power detection circuit is arranged on the circuit board body.

[0017] The printed circuit board provided in the embodiment of the present application includes the power detection circuit of any one of the first aspects, and its beneficial effects are the same as those of the power detection circuit, which will not be repeated here.

[0018] According to a third aspect of an embodiment of the present application, a terminal device is provided, comprising: the printed circuit board and multiple antennas of the second aspect; multiple test points of the power detection circuit and multiple radio frequency test sockets in the printed circuit board are each coupled to a different antenna.

[0019] The terminal device provided in the embodiment of the present application includes the power detection circuit of any one of the first aspects, and its beneficial effects are the same as the beneficial effects of the power detection circuit, which will not be repeated here.

[0020] According to a fourth aspect of an embodiment of the present application, a method for driving a power detection circuit is provided, wherein the power detection circuit includes a first RF module, a second RF module, multiple RF test sockets, a test receiver, and a first multi-pole multi-throw switch; the first RF module includes multiple first RF channels, a first coupling channel, and a first connection end; the second RF module includes multiple second RF channels and multiple second connection ends; the method for driving the power detection circuit includes: the RF test socket receives a first test power signal P1, the first test power signal P1 passes through the second RF channel and the first multi-pole multi-throw switch to the first RF channel, and detects the first received signal W1 of the test point; obtains the difference X1 between the first received signal W1 and the first test power signal P1; the RF test socket receives a second test power signal P2, the second test power signal P2 passes through the second RF channel and the first multi-pole multi-throw switch to the first RF channel, and then passes through the first coupling channel and the first multi-pole multi-throw switch to the A test receiver is used to detect a second received signal W2 of the test receiver, and a mapping relationship between a test power signal P of a test point and the second received signal W2 is established; wherein, P=P2-X1; the radio frequency test socket repeatedly receives different second test power signals P2, and establishes a mapping relationship table between the test power signal P and the second received signal W2; the preset power signal P3 in the first radio frequency channel is transmitted to the test receiver via the first coupling channel, and the third received signal W3 of the test receiver is detected, and a mapping relationship between the preset power signal P3 and the third received signal W3 is established; different preset power signals P3 are repeatedly transmitted to the test receiver via the first coupling channel, and a mapping relationship table between the preset power signal P3 and the third received signal W3 is established; based on the mapping relationship table between the test power signal P and the second received signal W2, and the mapping relationship table between the preset power signal P3 and the third received signal W3, a mapping relationship table between the test power signal P and the preset power signal P3 is established.

[0021] The beneficial effects of the driving method of the power detection circuit provided in the fourth aspect are the same as the beneficial effects of the power detection circuit provided in the first aspect, and will not be repeated here.

[0022] A fifth aspect of an embodiment of the present application provides a driving method for a power detection circuit, wherein the power detection circuit includes a first RF module, a second RF module, multiple RF test sockets, a test receiver, and a first multi-pole multi-throw switch; the first RF module includes multiple first RF channels, a first coupling channel, and a first connection end; the second RF module includes multiple second RF channels, a second coupling channel, and multiple second connection ends; the driving method for the power detection circuit includes: the RF test socket receives a first test power signal P1, the first test power signal P1 passes through the second RF channel and the first multi-pole multi-throw switch to the first RF channel, and detects the first received signal W1 of the test point; obtains the difference X1 between the first received signal W1 and the first test power signal P1; the RF test socket receives a second test power signal P2, the second test power signal P2 passes through the second RF channel and the first multi-pole multi-throw switch to the first RF channel, and then passes through the first coupling channel and the first multi-pole multi-throw switch to the test receiver, detects the second received signal W2 of the test receiver, and establishes a test power signal of the test point. The mapping relationship between P and the second received signal W2; wherein, P=P2-X1; the preset power signal P3 in the first RF channel is transmitted to the test receiver via the first coupling channel, the third received signal W3 of the test receiver is detected, and a mapping relationship between the preset power signal P3 and the third received signal W3 is established; according to the mapping relationship between the test power signal P and the second received signal W2, and the mapping relationship between the preset power signal P3 and the third received signal W3, a mapping relationship between the test power signal P and the preset power signal P3 is established; the same preset power signal P3 in the first RF channel is transmitted to the second RF channel via the first coupling channel and the first multi-pole multi-throw switch, and the fourth received signal W4 of the RF test socket is detected; the difference X2 between the fourth received signal W4 and the test power signal P is obtained; different preset power signals P3 in the first RF channel are repeatedly transmitted through the first coupling channel and the first multi-pole multi-throw switch to the second RF channel, and the fifth received signal W5 of the RF test socket is detected, and a mapping relationship table between the preset power signal P3 and the test power signal P is established, wherein P=W5-X2. This method of driving a power detection circuit only requires a single value within the dynamic range of the test receiver to detect the third received signal of the test receiver during the detection process, eliminating the need for multiple value acquisitions. Therefore, it places lower demands on the dynamic range of the test receiver and the power accuracy within the dynamic range. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a power detection circuit provided in an embodiment of the present application;

[0025] Figure 3A schematic diagram of the structure of another power detection circuit provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of coupling between a power detection circuit and an antenna provided in an embodiment of the present application;

[0027] Figure 5A A schematic diagram of the structure of another power detection circuit provided in an embodiment of the present application;

[0028] Figure 5B A schematic diagram of coupling between a detection auxiliary module and a load provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of a driving process of a power detection circuit provided in an embodiment of the present application;

[0030] Figure 7 A schematic diagram of the driving process of another power detection circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0032] Hereinafter, the terms "second," "first," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature qualified as "second," "first," etc., may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0033] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left", and "right" may be defined including but not limited to the orientation relative to the schematic placement of the components in the drawings. It should be understood that these directional terms may be relative concepts, which are used for relative descriptions and clarifications, and may change accordingly according to changes in the orientation of the components in the drawings.

[0034] In this application, unless otherwise specified or limited, the term "connected" should be understood broadly. For example, "connected" can mean fixed, removable, or integrated; it can mean directly connected or indirectly connected through an intermediary. Furthermore, the term "electrically connected" can mean direct electrical connection or indirect electrical connection through an intermediary.

[0035] At the same time, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0036] An embodiment of the present application provides a terminal device, which may be a device for implementing wireless communication functions. For example, a terminal or a chip that can be used in a terminal. The terminal may be user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, or a terminal device in a 5G network or a future evolved public land mobile network (PLMN). An access terminal may be a mobile phone, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. The terminal may be mobile or fixed.

[0037] The following is a schematic explanation using a mobile phone as an example. Figure 1 As shown, the terminal device 100 includes components such as a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111.

[0038] It will be understood by those skilled in the art that Figure 1 The structure of the terminal device 100 shown in the figure does not constitute a limitation to the terminal device 100. The terminal device 100 may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0039] RF unit 101 can be used to send and receive information or receive and send signals during calls. For example, it receives downlink data from a base station and passes it to processor 110 for processing. It also sends uplink data to the base station. RF unit 101 can also communicate with the network and other devices via wireless communication systems.

[0040] For example, the radio frequency unit 101 may be one of a WiFi unit, a global system for mobile communication (GSM) unit, and a wideband code division multiple access (WCDMA) unit, or may be other radio frequency units, which is not limited in the embodiment of the present invention.

[0041] The terminal device provides users with wireless broadband Internet access through the network module 102, such as helping users to send and receive emails, browse web pages, and access streaming media.

[0042] The audio output unit 103 can convert audio data received by the RF unit 101 or the network module 102 or stored in the memory 109 into an audio signal and output it as sound. In addition, the audio output unit 103 can also provide audio output related to a specific function performed by the terminal device 100 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include, for example, a speaker, a buzzer, and a receiver.

[0043] The input unit 104 is configured to receive audio or video signals and may include a graphics processing unit (GPU) 1041 and a microphone 1042 .

[0044] The graphics processor 1041 processes image data of still pictures or videos obtained by an image capture device (e.g., a camera) in video capture mode or image capture mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphics processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the network module 102.

[0045] The microphone 1042 can receive sound and process the sound into audio data. The processed audio data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 101 in the case of a phone call mode.

[0046] The terminal device 100 further includes at least one sensor 105 , such as a light sensor, a motion sensor, or other sensors.

[0047] For example, the light sensor includes an ambient light sensor and a proximity sensor. Among them, the ambient light sensor can adjust the brightness of the display screen 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display screen 1061 and / or backlight when the terminal device 100 is moved to the ear.

[0048] For example, motion sensors include accelerometers, which can detect acceleration in all directions (generally three axes) and the magnitude and direction of gravity when stationary. They can be used to identify the posture of the terminal device (such as landscape or portrait screen switching, related games, magnetometer posture calibration) or vibration recognition related functions (such as pedometers and taps).

[0049] The sensor 105 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like.

[0050] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display screen 1061, which may be a liquid crystal display (LCD) screen, an organic light-emitting diode (OLED) screen, or the like.

[0051] The user input unit 107 may be configured to receive input digital or character information and generate key signal input related to user settings and function control of the terminal device 100. For example, the user input unit 107 includes a touch panel 1071 and other input devices 1072.

[0052] The touch panel 1071, also known as a touch screen, can collect touch operations performed by a user on or near it (such as operations performed by a user using a finger, stylus, or any other suitable object or accessory on or near the touch panel 1071). The touch panel 1071 may include two parts: a touch detection device and a touch controller. The touch detection device detects the touch direction of the user, detects the signal caused by the touch operation, and transmits the signal to the touch controller. The touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the processor 110, receives the command sent by the processor 110, and executes it. The touch panel 1071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave.

[0053] In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. For example, the other input devices 1072 may include but are not limited to a physical keyboard, function keys (such as volume control keys, power keys, etc.), a trackball, a mouse, a joystick, etc.

[0054] The touch panel 1071 may be overlaid on the display screen 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. The processor 110 then provides a corresponding visual output on the display screen 1061 according to the type of touch event. Figure 1 In the embodiment, the touch panel 1071 and the display screen 1061 are used as two independent components to realize the input and output functions of the terminal device 100, but in some embodiments, the touch panel 1071 and the display screen 1061 can be integrated to realize the input and output functions of the terminal device 100.

[0055] The interface unit 108 is an interface for connecting external devices to the terminal device 100. For example, the external devices may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from the external device and transmit the received input to one or more components within the terminal device 100, or may be used to transmit data between the terminal device 100 and the external device.

[0056] The memory 109 can be used to store software programs and various data. The memory 109 can mainly include a program storage area and a data storage area. The program storage area can store the operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.). The data storage area can store data generated based on the use of the mobile phone (such as audio data, a phone book, etc.).

[0057] The memory 109 may be, for example, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 109 may exist independently and be connected to the processor 110 via a communication line. The memory 109 may also be integrated with the processor 110.

[0058] The memory 109 is used to store computer execution instructions for executing the solution of the present application, and the execution is controlled by the processor 110.

[0059] The computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0060] In addition, the memory 109 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0061] The processor 110 is the control center of the terminal device. It connects the various components of the entire terminal device using various interfaces and lines. By running or executing software programs and / or modules stored in the memory 109 and accessing data stored in the memory 109, it performs various functions of the terminal device and processes data, thereby monitoring the terminal device as a whole. The processor 110 may include one or more processing units. For example, the processor 110 may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and application programs. The modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into the processor 110.

[0062] The terminal device 100 may also include a power supply 111 (such as a battery) for supplying power to various components. For example, the power supply 111 may be logically connected to the processor 110 via a power management system, thereby managing charging, discharging, and power consumption through the power management system.

[0063] The RF unit 101 includes a RF module, and the RF channel in the RF module needs to be calibrated and tested before the terminal device 100 leaves the factory. Based on this, the terminal device 100 includes a power detection circuit for calibrating and testing the RF channel.

[0064] The embodiment of the present application provides a printed circuit board (PCB), including a PCB body, on which the power detection circuit can be integrated. In addition, the processor 110 in the terminal device 100 can also be integrated into the PCB body.

[0065] In some embodiments, the printed circuit board may be a mainboard of the terminal device 100 .

[0066] In order to implement calibration testing of the RF channel in the RF module, the embodiment of the present application provides a power detection circuit, such as Figure 2 As shown, the power detection circuit includes:

[0067] The first RF module 20 includes a first coupling channel 21 and a first connecting end 20 a . The first port of the first coupling channel 21 is coupled to the first connecting end 20 a .

[0068] The second RF module 30 includes a second coupling channel 31 and a plurality of second connection terminals 30 a . The first port of the second coupling channel 31 is coupled to each second connection terminal 30 a .

[0069] The plurality of RF test sockets 40 , the first connection end 20 a and each second connection end 30 a of the plurality of second connection ends 30 a are respectively coupled to a corresponding RF test socket 40 .

[0070] The test receiver 50 is used to measure the power of the first coupling channel 21 and the second coupling channel 31 .

[0071] The single-pole multi-throw switch 60 includes a plurality of movable terminals 60 a and a fixed terminal 60 b. The movable terminals 60 a of the single-pole multi-throw switch 60 are coupled to the second port of the first coupling channel 21 and the second port of the second coupling channel 31, respectively. The fixed terminal 60 b of the single-pole multi-throw switch 60 is coupled to a measurement receiver (MRx) 50.

[0072] in, Figure 2 The structures of the first RF module 20 and the second RF module 30 shown are only for reference. Figure 2 Taking the example that the main diversity of the first RF module 20 and the main diversity of the second RF module 30 have four RF channels, each RF channel needs to be correspondingly provided with a RF test socket 40, and a total of four RF test sockets 40 are required for testing.

[0073] However, since the RF test socket 40 only performs calibration tests on the RF channel to which it is connected, after factory calibration, the test socket no longer performs a testing function and only serves as a signal connection. Its function is equivalent to the signal routing in the circuit board body. In addition, the RF test socket 40 occupies a large area and is relatively expensive. Therefore, the presence of the RF test socket 40 will increase the area of ​​the PCB to a certain extent, increasing the cost of the product. Therefore, some products will omit the RF test socket 40 corresponding to the diversity or main set, reducing the occupied area and cost of the RF test socket 40 by reducing the number of RF test sockets 40. However, in this case, because some diversity or main sets do not have an RF test socket 40, the RF test socket 40 included in the power detection circuit only acts on one RF channel, resulting in the RF channel for which the RF test socket 40 is not correspondingly installed not undergoing pre-shipment calibration testing. As a result, the power accuracy of the main set or diversity set that has not undergone calibration testing is low, which affects the power accuracy performance of the terminal device 100 and may even mask RF problems of the terminal device 100.

[0074] Based on this, the embodiment of the present application also provides a power detection circuit, such as Figure 3 As shown, the power detection circuit includes:

[0075] The first RF module 20 includes multiple first RF channels 22, a first coupling channel 21, a first connection terminal 20a, and a second connection terminal 20b. The first ports of the first RF channels 22 and the first ports of the first coupling channel 21 are coupled to the first connection terminal 20a. The first connection terminal 20a is also coupled to multiple test points Q.

[0076] In some embodiments, as Figure 3As shown, the first RF module 20 includes a first coupling module 23 , a second single-pole multi-throw switch 24 and a plurality of first power amplifiers (PAs) 25 .

[0077] The first coupling module 23 is coupled to the first connecting end 20 a and the first movable end 61 a of the first multi-pole multi-throw switch 61 to form a first coupling channel 21 .

[0078] The first coupling module 23 includes, for example, a first coupler.

[0079] The third fixed terminal 24b of the second SPMT switch 24 is coupled to the first connection terminal 20a, and the multiple third movable terminals 24a of the second SPMT switch 24 are coupled to the multiple first power amplifiers 25 and the first movable terminal 61a of the first MPMT switch 61 to form multiple first RF channels 22.

[0080] In some embodiments, the power detection circuit further includes a first single-pole multi-throw switch 62. The first single-pole multi-throw switch 62 includes a plurality of second movable terminals 62a and a second fixed terminal 62b, wherein the second fixed terminal 62b is coupled to the first connection terminal 20a, and the plurality of second movable terminals 62a are coupled to a plurality of test points Q.

[0081] The number of test points Q is the same as the number of primary diversity in the first RF module 20. Figure 3 As shown, the number of main diversity in the first RF module 20 is two, and thus the number of test points Q is two. The first RF module 20 is not provided with a corresponding RF test socket 40 .

[0082] Similarly, the number of the second movable terminals 62a of the first SPMT switch 62 is the same as the number of the test points Q. Figure 3 As shown, there are two test points Q, and the first SPMT switch 62 also has two second movable terminals 62a, with the two second movable terminals 62a being coupled to the two test points Q in a one-to-one correspondence. That is, the first SPMT switch 62 is a single-pole double-throw switch, with one second movable terminal 62a coupled to one test point Q.

[0083] In this way, the first RF module 20 may include only one first connection terminal 20 a to simplify the port structure of the first RF module 20 .

[0084] In other embodiments, a test point Q is directly coupled to a first connection terminal 20a, and the two are in a one-to-one correspondence. In this way, the hardware structure of the power detection circuit can be simplified.

[0085] The second RF module 30 includes a plurality of second RF channels 32, a second coupling channel 31, and a plurality of second connection terminals 30a. The first port of each second RF channel 32 and the first port of each second coupling channel 31 are coupled to each second connection terminal 30a.

[0086] The second RF module 30 includes a second coupling module 33 , a second multi-pole multi-throw switch 34 and a plurality of second power amplifiers 35 .

[0087] The second coupling module 33 is coupled to the plurality of second connection terminals 30 a and the first movable terminal 61 a of the first multi-pole multi-throw switch 61 to form a second coupling channel 32 .

[0088] The multiple fourth fixed terminals 34b of the second multi-pole multi-throw switch 34 are correspondingly coupled to the multiple second connection terminals 30a, and the multiple fourth movable terminals 34a of the second multi-pole multi-throw switch 34 are coupled to the multiple second power amplifiers 35 and the first fixed terminal 61b of the first multi-pole multi-throw switch 61 to form multiple second RF channels 32.

[0089] Regarding the structure of the second coupling module 33 , the second coupling module 33 includes a plurality of second couplers 331 and a third single-pole multi-throw switch 332 .

[0090] The plurality of second coupling modules 33 are coupled to the plurality of second connection terminals 30a, and are further coupled to the plurality of fifth movable terminals 332a of the third single-pole multi-throw switch 332. The fifth fixed terminal 332b of the third single-pole multi-throw switch 332 serves as the second port of the second coupling channel 32.

[0091] In some embodiments, Figure 3 As shown, the plurality of fourth movable terminals 34 a of the second multi-pole multi-throw switch 34 are also coupled to the first movable terminal 61 a of the first multi-pole multi-throw switch 61 .

[0092] A plurality of RF test sockets 40 are correspondingly coupled to the plurality of second connection ends 30 a.

[0093] That is, the RF test sockets 40 are coupled to the second connection terminals 30 a in a one-to-one manner, and each second connection terminal is coupled to a RF test socket 40. In other words, each second connection terminal 30 a of the second RF module 30 is coupled to a RF test socket 40.

[0094] The number of RF test sockets 40 is the same as the number of main and sub-diversity components of the second RF module 30, and each main and sub-diversity component has a corresponding RF test socket 40. Figure 3 As shown, the number of the main diversity of the second RF module 30 is two, and the number of the RF test sockets 40 is also two.

[0095] The radio frequency integrated circuit (RFIC) includes a test receiver 50 , which is integrated in the RFIC. The test receiver 50 is used to measure the power of the first coupling channel 21 .

[0096] The first multi-pole, multi-throw switch 61 includes a plurality of first movable terminals 61a and a plurality of first fixed terminals 61b. The plurality of first movable terminals 61a are coupled to the second ports of the plurality of first RF channels 22, the second port of the first coupling channel 21, the second ports of the plurality of second RF channels 32, and the second port of the second coupling channel 31. The plurality of first fixed terminals 61b are coupled to the second ports of the plurality of second RF channels 32 and the test receiver 60.

[0097] In some embodiments of the present application, the second ports of multiple first RF channels 22 are coupled to the same first movable end 61a, the second ports of multiple second RF channels 32 are coupled to the same first movable end 61a, and the second ports of multiple second RF channels 32 are also coupled to the same first fixed end 61b.

[0098] The plurality of first movable terminals 61a are coupled to the second ports of the plurality of first RF channels 22, the second port of the first coupling channel 21, the second ports of the plurality of second RF channels 32, and the second port of the second coupling channel 31. It can be understood that the first multi-pole, multi-throw switch 61 includes four first movable terminals 61a, the second ports of the plurality of first RF channels 22 are coupled to one first movable terminal 61a, the second port of the first coupling channel 21 is coupled to one first movable terminal 61a, the second ports of the plurality of second RF channels 32 are coupled to one first movable terminal 61a, and the second port of the second coupling channel 31 is coupled to one first movable terminal 61a. Furthermore, the second ports of the plurality of first RF channels 22, the second port of the first coupling channel 21, the second ports of the plurality of second RF channels 32, and the second port of the second coupling channel 31 are each coupled to a different first movable terminal 61a.

[0099] During the driving process of the power detection circuit, calibration detection can be performed in two scenarios.

[0100] The first scenario is to perform calibration and testing at the whole machine workstation.

[0101] After the printed circuit board provided with the power detection circuit is assembled in the terminal equipment, Figure 4 As shown, the terminal device includes an antenna, and multiple test points Q and multiple radio frequency test sockets 40 are each coupled to a different antenna.

[0102] That is, one test point Q is coupled to one antenna, one RF test socket 40 is coupled to one antenna, and one antenna is only coupled to one test point Q or one RF test socket 40 .

[0103] The second scenario is to perform calibration and testing at the single board workstation.

[0104] That is, the calibration test is directly performed on the printed circuit board provided with the power detection circuit.

[0105] In this case, the load at test point Q and the RF test socket 40 is close to an open circuit. During calibration testing, a load connected to a matching circuit is connected to the power detection circuit to provide a matched load for the path, ensuring that the input impedance at test point Q and the RF test socket 40 meets the requirements (e.g., close to 50 ohms).

[0106] In some embodiments, the load is mounted on a separate tool board without adding any additional circuits to the terminal device 100 .

[0107] Based on this, in some embodiments of the present application, as shown in FIG5 , the power detection circuit further includes a detection auxiliary module 70 , which is coupled to the test point Q and the load, and is used to connect the load to the test point Q.

[0108] Regarding detection auxiliary modules, such as Figure 5A As shown, the detection auxiliary module 70 includes an inductor L, a capacitor C and an antenna spring 71 .

[0109] One end of the inductor L is coupled to the test point Q, and the other end of the inductor L is coupled to the reference ground.

[0110] One end of the capacitor C is coupled to the test point Q, and the other end of the capacitor C is coupled to the antenna spring 71 .

[0111] The antenna spring 71 is used for coupling with a load.

[0112] Regarding the load, in the complete machine workstation scenario, the load is the antenna mentioned above. In the single-board workstation scenario, the load can be any equivalent matching circuit.

[0113] It should be noted that the sizes of the inductor L and the capacitor C in the detection auxiliary module 70 coupled to the test point Q and the RF test socket 40 are not limited to be the same, and can be different and can be reasonably set according to needs.

[0114] For example, Figure 5B As shown, the matching circuit includes a first inductor L1 , a second inductor L2 , and an antenna tuner 80 .

[0115] One end of the first inductor L1 is coupled to the connection point O and one end is coupled to the reference ground. One end of the second inductor L2 is coupled to the antenna tuner 80 and one end is coupled to the reference ground. One end of the antenna tuner 80 is also coupled to the connection point O. The matching circuit is coupled to the antenna shrapnel 71 through the connection point O.

[0116] Based on this, an embodiment of the present application further provides a driving method of the above-mentioned power detection circuit, including:

[0117] S1, the RF test socket 40 receives the first test power signal P1, and the first test power signal P1 is transmitted to the first RF channel 22 ( Figure 6 The first receiving signal W1 of the test point Q is detected; the difference X1 between the first receiving signal W1 and the first test power signal P1 is obtained to obtain the line loss between the RF test socket 40 and the test point Q.

[0118] For example, P1=10dBm, W1=2dBm, X1=8dBm.

[0119] In step S1 , the second RF channel 32 can be any second RF channel 32 in the second RF module 30 , and is selected by the second MPMT switch 34 . The first RF channel 22 can be any first RF channel 22 in the first RF module 20 , and is selected by the second SPMT switch 24 .

[0120] The first test power signal P1 can be sent, for example, by an external device or the processor 110 in the terminal device 100. The signal at the test point Q can be detected, for example, by an instrument. The process of obtaining the difference X1 between the first received signal W1 and the first test power signal P1 can be performed, for example, by the processor 110. X1 can be stored, for example, in a memory of the terminal device 100.

[0121] S2, the RF test socket 40 receives the second test power signal P2, the second test power signal P2 passes through the second RF channel 32 and the first multi-pole multi-throw switch 61 to the first RF channel 22, and then passes through the first coupling channel 21 and the first multi-pole multi-throw switch 61 to the test receiver 50 ( Figure 6 The second receiving signal W2 of the test receiver 50 is detected, and a mapping relationship between the test power signal P at the test point Q and the second receiving signal W2 is established.

[0122] For example, P2=0 dBm, W2=-10 dBm, P=-8 dBm.

[0123] The second RF channel 32 and the first RF channel 22 in step S2 are the same as those in step S1 , and P=P2−X1.

[0124] That is, the RF test socket 40 receives the second test power signal P2, and the test receiver 50 receives the second received signal W2. The line loss between the RF test socket 40 and the test point Q is X1. Therefore, the second test power signal P2 received by the RF test socket 40 minus the line loss X1 between the RF test socket 40 and the test point Q equals the test power signal P at the test point Q (P = P2 - X1). This yields a mapping between the test power signal P at the test point Q and the second received signal W2.

[0125] S3 . The RF test socket 40 repeatedly receives different second test power signals P2 , and establishes a mapping relationship table between different test power signals P at the test point Q and the second received signal W2 .

[0126] For example, see Table 1 below.

[0127] Table 1

[0128] Second test power signal P2 (dBm) Second received signal W2 (dBm) Test power signal P (dBm) 0 -10 -8 1 -11 -7 2 -12 -6

[0129] The mapping relationship table between different test power signals P and W2 at the test point Q may be stored in the memory, for example.

[0130] S4. The preset power signal P3 in the first RF channel 22 is transmitted to the test receiver 50 via the first coupling channel 21. The third received signal W3 of the test receiver 50 is detected, and a mapping relationship between P3 and W3 is established.

[0131] For example, P3=10, W3=-10.

[0132] The preset power signal P3 may be sent by the first power amplifier 25 in the first RF channel 22 , for example.

[0133] S5 . Different preset power signals P3 are repeatedly transmitted through the first coupling channel 21 to the test receiver 50 , and a mapping relationship table between the preset power signals P3 and the third received signal W3 is established.

[0134] For example, see Table 2 below.

[0135] Table 2

[0136]

[0137]

[0138] That is to say, the preset power signal P3 of each gear is calibrated respectively.

[0139] The preset power signal P3 is which first power amplifier 25 in the first RF channel 22 transmits the power signal at which time, and can be controlled by the second single-pole multi-throw switch 24 .

[0140] S6. Establish a mapping relationship table between the test power signal P and the preset power signal P3 according to the mapping relationship table between the test power signal P and the second received signal W2 and the mapping relationship table between the preset power signal P3 and the third received signal W3.

[0141] Since the second received signal W2 and the third received signal W3 are both received signals of the test receiver 50 , when the values ​​of W2 and W3 are the same, a mapping relationship between the test power signal P and the preset power signal P3 can be established.

[0142] For example, according to Table 1 and Table 2, there are three groups of values ​​of W2 and W3 that are the same, and the mapping relationship table between the test power signal P and the preset power signal P3 is established as shown in Table 3 below.

[0143] Table 3

[0144] Test power signal P (dBm) Preset power signal P3 (dBm) -8 10 -7 12 -6 14

[0145] Thus, the calibration of one RF channel in the first RF module 20 is completed. The above process can be repeated to complete the calibration of each RF channel in the first RF module 20.

[0146] It is understandable that the selection of which RF channel to calibrate each time can be controlled by the first single-pole multi-throw switch 62 .

[0147] The calibration of the RF channel in the second RF module 30 can be completed directly through the RF test socket 40, for example, by outputting a power signal through the second power amplifier 35 and directly detecting the received signal at the RF test socket 40 to complete the calibration, which will not be repeated here.

[0148] The embodiment of the present application eliminates the RF test socket 40 coupled to the first RF module 20, thereby creating a path between the channels in the first RF module 20 and the channels in the second RF module 30. Calibration testing of the channels in the first RF module 20 is performed using the test capabilities of the test receiver 50 and the RF test socket 40 coupled to the second RF module 30. In other words, the power detection circuit provided in the embodiment of the present application, while eliminating the RF test socket 40 corresponding to the first RF module 20, can still perform calibration testing on the RF channels in the first RF module 20. Therefore, compared to related art, the power detection circuit provided in the embodiment of the present application can eliminate some of the RF test sockets 40, saving PCB layout area and improving the PCB utilization of the terminal device 100. At the same time, it does not mask RF issues in certain channels or sacrifice the power accuracy performance of certain channels. Therefore, the power detection circuit provided in the embodiment of the present application can meet the needs of reducing the device footprint without eliminating functional components or compromising RF performance when the PCB layout area of ​​the terminal device 100 is limited.

[0149] The present application also provides a method for driving a power detection circuit, including:

[0150] S10, the RF test socket 40 receives the first test power signal P1, the first test power signal P1 passes through the second RF channel 32 and the first multi-pole multi-throw switch 61 to the first RF channel 22, and detects the first received signal W1 of the test point Q; obtains the difference X1 between the first received signal W1 and the first test power signal P1.

[0151] For example, P1=10dBm, W1=2dBm, X1=8dBm.

[0152] Step S10 is the same as the above-mentioned S1, and reference may be made to the relevant description, which will not be repeated here.

[0153] S20, the RF test socket 40 receives the second test power signal P2, the second test power signal P2 passes through the second RF channel 32 and the first multi-pole multi-throw switch 61 to the first RF channel 22, and then passes through the first coupling channel 21 and the first multi-pole multi-throw switch 61 to the test receiver 50, detects the second received signal W2 of the test receiver 50, and establishes a mapping relationship between the test power signal P at the test point Q and the second received signal W2; wherein P = P2-X1.

[0154] For example, P2=0 dBm, W2=-10 dBm, P=-8 dBm.

[0155] Step S20 is the same as the above-mentioned S2, and the relevant description may be referred to, which will not be repeated here.

[0156] S30 , the preset power signal P3 in the first RF channel 22 is transmitted to the test receiver 50 via the first coupling channel 21 , the third received signal W3 of the test receiver 50 is detected, and a mapping relationship between the preset power signal P3 and the third received signal W3 is established.

[0157] For example, P3=10dBm, W3=-10dBm.

[0158] S40 . Establish a mapping relationship between the test power signal P and the preset power signal P3 according to the mapping relationship between the test power signal P and the second received signal W2 and the mapping relationship between the preset power signal P3 and the third received signal W3 .

[0159] For example, P = -8dBm, P3 = 10dBm.

[0160] S50, the same preset power signal P3 in the first RF channel 22 is transmitted to the second RF channel 32 (eg, Figure 7), detecting the fourth received signal W4 of the RF test socket 40; obtaining the difference X2 between the fourth received signal W4 and the test power signal P; and obtaining the line loss between the RF test socket 40 and the test point Q.

[0161] That is, the preset power signal P3 in step S50 is the same as the preset power signal P3 in step S30 .

[0162] The process of obtaining the difference X2 between the fourth received signal W4 and the test power signal P includes: obtaining the mapping relationship between the fourth received signal W4 and the preset power signal P3. According to the mapping relationship between the test power signal P and the preset power signal P3 and the mapping relationship between the fourth received signal W4 and the preset power signal P3, the mapping relationship between the test power signal P and the fourth received signal W4 under the same preset power signal P3 can be obtained, thereby obtaining the difference X2 between the test power signal P and the fourth received signal W4 under the same preset power signal P3.

[0163] For example, P3=10dBm, W4=0dBm, P=-8dBm, X2=8dBm.

[0164] S60, the different preset power signals P3 in the first RF channel 22 are repeatedly transmitted through the first coupling channel 21 and the first multi-pole multi-throw switch 61 to the second RF channel 32, and the fifth received signal W5 of the RF test socket 40 is detected. A mapping relationship table between the preset power signal P3 and the test power signal P is established, where P=W5-X2.

[0165] For example, Table 4 below

[0166] Table 4

[0167] Test power signal P (dBm) Preset power signal P3 (dBm) Fifth received signal W5 (dBm) -8 10 0 -7 12 -1 -6 14 -2

[0168] In this method of driving the power detection circuit, step S30 is performed only once during the detection process, requiring only a single value within the dynamic range of the test receiver 50 to be obtained, rather than requiring multiple values ​​to be obtained. Therefore, lower requirements are placed on the dynamic range of the test receiver 50 and the power accuracy within the dynamic range.

[0169] In some embodiments of the present application, the first RF module 20 is a low-frequency RF module relative to the second RF module 30 .

[0170] For example, the first RF module 20 is a low band (LB) RF module, and the second RF module 30 is a mid and high band (MHB) RF module.

[0171] In this way, since the RF module that is not equipped with a corresponding RF test socket 40 needs to be calibrated through the RF module that is equipped with a corresponding RF test socket 40, and the low-frequency band signal can pass through the high-frequency band RF module, but the high-frequency band signal must pass through the low-frequency band RF module, the performance requirements of the components in the low-frequency band RF module are relatively high. Therefore, the second RF module 30 is equipped with a corresponding RF test socket 40, and the second RF module 30 is limited to a medium- and high-frequency band RF module. This can avoid the problem that the medium- and high-frequency band signals cannot pass through the second single-pole multi-throw switch 24 due to the performance of the second single-pole multi-throw switch 24 in the first RF module 20 not meeting the requirements, and the problem of being unable to complete the calibration of the RF channel in the second RF module 30 can be avoided, thereby reducing the requirements for the second single-pole multi-throw switch 24.

[0172] It should be noted that the PCB in the above-mentioned terminal device 100 may also include components such as a radio frequency front-end module, and components such as the first coupler and the second coupler in the above-mentioned power detection circuit may be integrated in the radio frequency front-end module.

[0173] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A power detection circuit, characterized in that: include: A first radio frequency module, comprising a plurality of first radio frequency channels, a first coupling channel and a first connection end; The first port of the first radio frequency channel and the first port of the first coupling channel are coupled to the first connection end, and the first connection end is also coupled to a plurality of test points; A second radio frequency module, comprising a plurality of second radio frequency channels and a plurality of second connection terminals; The first ports of the plurality of second radio frequency channels are coupled to each of the second connection ends; A plurality of radio frequency test sockets, the plurality of radio frequency test sockets being coupled to the plurality of second connection ends correspondingly; A test receiver, used for measuring the power of the first coupling channel; A first multi-pole multi-throw switch, comprising a plurality of first movable ends and a plurality of first fixed ends; The multiple first movable ends are coupled correspondingly to the second ports of the multiple first RF channels, the second port of the first coupling channel, and the second ports of the multiple second RF channels, and the multiple first fixed ends are coupled correspondingly to the second ports of the multiple second RF channels and the test receiver.

2. The power detection circuit according to claim 1, characterized in that: The first RF module is a low-frequency RF module relative to the second RF module.

3. The power detection circuit according to claim 1, characterized in that: The power detection circuit also includes a first single-pole multi-throw switch; The first single-pole multi-throw switch includes a plurality of second movable ends and a second fixed end, the second fixed end is coupled to the first connecting end, and the plurality of second movable ends are coupled to the plurality of test points accordingly.

4. The power detection circuit according to claim 1, characterized in that: The first radio frequency module includes a first coupler, a second single-pole multi-throw switch and a plurality of first power amplifiers; The first coupler is coupled with the first connecting end and the first moving end to form the first coupling channel; The third fixed end of the second single-pole multi-throw switch is coupled to the first connecting end, and the multiple third movable ends of the second single-pole multi-throw switch are coupled to the multiple first power amplifiers and the first movable end to form the multiple first RF channels.

5. The power detection circuit according to claim 1, characterized in that: The second radio frequency module includes a second multi-pole multi-throw switch and a plurality of second power amplifiers; The multiple fourth fixed ends of the second multi-pole multi-throw switch are coupled correspondingly to the multiple second connection ends, and the multiple fourth movable ends of the second multi-pole multi-throw switch are coupled to the multiple second power amplifiers and the first fixed end to form the multiple second RF channels.

6. The power detection circuit according to claim 5, characterized in that: The second radio frequency module further includes a plurality of second couplers and a third single-pole multi-throw switch; The multiple second couplers are coupled correspondingly to the multiple second connection ends, and are also coupled correspondingly to the multiple fifth moving ends of the third single-pole multi-throw switch; the first multi-pole multi-throw switch also includes the first moving end which is separately coupled to the fifth fixed end of the third single-pole multi-throw switch.

7. The power detection circuit according to any one of claims 1 to 6, characterized in that: The power detection circuit further includes a detection auxiliary module, which is coupled to the test point and the load and is used to connect the load to the test point.

8. The power detection circuit according to claim 7, characterized in that: The detection auxiliary module includes an inductor, a capacitor and an antenna shrapnel; One end of the inductor is coupled to the test point, and the other end of the inductor is coupled to a reference ground end; One end of the capacitor is coupled to the test point, and the other end of the capacitor is coupled to the antenna spring; The antenna spring is used for coupling with a load.

9. The power detection circuit according to claim 1, characterized in that: The power detection circuit further includes a radio frequency integrated circuit, and the test receiver is integrated in the radio frequency integrated circuit.

10. A printed circuit board, characterized in that: include: A circuit board body and a power detection circuit as described in any one of claims 1 to 9; the power detection circuit is arranged on the circuit board body.

11. A terminal device, characterized in that: include: The printed circuit board and multiple antennas as claimed in claim 10; A plurality of test points of the power detection circuit in the printed circuit board and a plurality of radio frequency test sockets are respectively coupled to different antennas.

12. A driving method of a power detection circuit, characterized in that: The power detection circuit includes a first radio frequency module, a second radio frequency module, a plurality of radio frequency test sockets, a plurality of test points, a test receiver and a first multi-pole multi-throw switch; the first radio frequency module includes a plurality of first radio frequency channels, a first coupling channel and a first connection end; The second radio frequency module includes a plurality of second radio frequency channels and a plurality of second connection terminals; The driving method of the power detection circuit comprises: The RF test socket receives a first test power signal P1, which is transmitted to the first RF channel via the second RF channel and the first multi-pole multi-throw switch, and detects a first receiving signal W1 at the test point; and obtains a difference X1 between the first receiving signal W1 and the first test power signal P1; The RF test socket receives a second test power signal P2, and the second test power signal P2 is transmitted to the first RF channel through the second RF channel and the first MPMT switch, and then transmitted to the test receiver through the first coupling channel and the first MPMT switch, and detects a second receiving signal W2 of the test receiver, and establishes a mapping relationship between the test power signal P of the test point and the second receiving signal W2; wherein P=P2-X1; The RF test socket repeatedly receives different second test power signals P2, and establishes a mapping relationship table between the test power signal P and the second received signal W2; The preset power signal P3 in the first RF channel is transmitted to the test receiver via the first coupling channel, a third receiving signal W3 of the test receiver is detected, and a mapping relationship between the preset power signal P3 and the third receiving signal W3 is established; Different preset power signals P3 are repeatedly transmitted through the first coupling channel to the test receiver, and a mapping relationship table between the preset power signals P3 and the third receiving signal W3 is established; According to the mapping relationship table between the test power signal P and the second received signal W2, and the mapping relationship table between the preset power signal P3 and the third received signal W3, a mapping relationship table between the test power signal P and the preset power signal P3 is established.

13. A driving method of a power detection circuit, characterized in that: The power detection circuit includes a first radio frequency module, a second radio frequency module, a plurality of radio frequency test sockets, a plurality of test points, a test receiver and a first multi-pole multi-throw switch; the first radio frequency module includes a plurality of first radio frequency channels, a first coupling channel and a first connection end; The second radio frequency module includes a plurality of second radio frequency channels, a second coupling channel and a plurality of second connection terminals; The driving method of the power detection circuit comprises: The RF test socket receives a first test power signal P1, which is transmitted to the first RF channel via the second RF channel and the first multi-pole multi-throw switch, and detects a first receiving signal W1 at the test point; and obtains a difference X1 between the first receiving signal W1 and the first test power signal P1; The RF test socket receives a second test power signal P2, and the second test power signal P2 is transmitted to the first RF channel through the second RF channel and the first MPMT switch, and then transmitted to the test receiver through the first coupling channel and the first MPMT switch, and detects a second receiving signal W2 of the test receiver, and establishes a mapping relationship between the test power signal P of the test point and the second receiving signal W2; wherein P=P2-X1; The preset power signal P3 in the first RF channel is transmitted to the test receiver via the first coupling channel, a third receiving signal W3 of the test receiver is detected, and a mapping relationship between the preset power signal P3 and the third receiving signal W3 is established; According to the mapping relationship between the test power signal P and the second received signal W2, and the mapping relationship between the preset power signal P3 and the third received signal W3, a mapping relationship between the test power signal P and the preset power signal P3 is established; The same preset power signal P3 in the first RF channel is transmitted to the second RF channel via the first coupling channel and the first multi-pole multi-throw switch, and the fourth receiving signal W4 of the RF test socket is detected; the difference X2 between the fourth receiving signal W4 and the test power signal P is obtained; Different preset power signals P3 in the first RF channel are repeatedly transmitted through the first coupling channel and the first multi-pole multi-throw switch to the second RF channel, and the fifth receiving signal W5 of the RF test socket is detected to establish a mapping relationship table between the preset power signal P3 and the test power signal P, where P=W5-X2.

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