Standing wave detection circuit, method and terminal device

Abstract

The application is suitable for the field of communication technology, and provides a standing wave detection circuit, method and terminal device. The circuit can directly obtain the forward power and reverse power of the antenna through the power detection module by spacing the power detection module and the antenna module or electrically connecting the power detection module and the antenna module, thereby improving the accuracy of power detection. The power detection module and the control module are electrically connected through the switch module, so that the forward power and reverse power of the working antenna can be sent to the control module, the forward power and reverse power of the non-working antenna are prevented from being sent to the control module, the signal interference or electromagnetic interference of the non-working antenna is reduced, the accuracy of power detection of the working antenna is further improved, and the accuracy of antenna standing wave ratio acquisition is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a standing wave detection circuit, a method and a terminal device. BACKGROUND

[0002] When the antenna impedance is completely matched, the antenna can achieve maximum power for signal transmission; when the antenna impedance is not matched, part of the signal transmitted by the antenna is reflected back, is consumed in the form of heat, and a reflected wave is generated in the feed line, at which time the current on the antenna is in a standing wave distribution. The voltage standing wave ratio (VSWR) represents the ratio of the maximum level and the minimum level of the standing wave, and the VSWR of the antenna can be obtained by obtaining the forward power and the reverse power of the antenna, so as to obtain the matching condition of the antenna impedance and analyze the working state of the antenna.

[0003] At present, the terminal device is limited by the mainboard space of the fixed architecture (for example, the Qualcomm platform or the MediaTek platform), and can only obtain the power of the power amplifier. In addition, elements such as a duplexer, a switch and a filter are arranged between the antenna and the power amplifier, so that there is a deviation between the power of the power amplifier and the power of the antenna, which leads to inaccurate power detection, and thus leads to inaccurate VSWR detection and the inability to accurately obtain the working state of the antenna. Therefore, how to accurately obtain the VSWR of the antenna has become a problem to be solved at present. SUMMARY

[0004] Therefore, the embodiments of the present application provide a standing wave detection circuit, a method and a terminal device to solve the problem that the existing terminal device is limited by the mainboard space of the fixed architecture, can only obtain the power of the power amplifier, elements such as a duplexer, a switch and a filter are arranged between the antenna and the power amplifier, so that there is a deviation between the power of the power amplifier and the power of the antenna, which leads to inaccurate power detection, and thus leads to inaccurate VSWR detection and the inability to accurately obtain the working state of the antenna.

[0005] A first aspect of the embodiments of the present application provides a standing wave detection circuit applied to a terminal device, wherein the terminal device comprises a radio frequency module and an antenna module, the antenna module comprises at least one antenna, and the standing wave detection circuit comprises a power detection module, a switch module and a control module which are electrically connected in sequence.

[0006] The control module and the radio frequency module are electrically connected, and the power detection module and the antenna module are spaced apart or electrically connected.

[0007] The control module is configured to control the switch module to be turned on and electrically connected with the power detection module when any antenna in the antenna module is working;

[0008] The power detection module is configured to detect the forward power and the reverse power of the any antenna and send the forward power and the reverse power to the control module via the switch module when the power detection module is electrically connected with the control module;

[0009] The control module is configured to obtain the standing wave ratio of the any antenna according to the forward power and the reverse power of the any antenna, and obtain the working state of the any antenna.

[0010] In one embodiment, when the antenna module includes n antennas, the power detection module includes n power detection units;

[0011] The control module is configured to control the switch module to be turned on and electrically connected with the i-th power detection unit when the i-th antenna is working;

[0012] The i-th power detection unit is configured to detect the forward power and the reverse power of the i-th antenna and send the forward power and the reverse power to the control module via the switch module when the i-th power detection unit is electrically connected with the control module;

[0013] The control module is configured to obtain the standing wave ratio of the i-th antenna according to the forward power and the reverse power of the i-th antenna, and obtain the working state of the i-th antenna.

[0014] wherein n is a positive integer, and i = 1, 2, …, n.

[0015] In one embodiment, the switch module includes a switch selection unit and n / k switch units;

[0016] The output end of the switch selection unit, the control end of the switch selection unit, and the control ends of the n / k switch units are electrically connected with the control module;

[0017] The input end of the switch selection unit is configured to be electrically connected with the output end of any switch unit in the n / k switch units according to the control of the control module;

[0018] The input end of the q-th switch unit is configured to be electrically connected with any power detection unit in the (q-1)*k+1-th power detection unit to the q*k-th power detection unit according to the control of the control module;

[0019] wherein k is a positive integer, k is less than n and n is an integer multiple of k; q = 1, 2, …, n / k; i ∈ [(q-1)*k+1, q*k].

[0020] In one embodiment, the control module is configured to control the switch selection unit to switch the on-off state when the ith antenna is working, so that the input end of the switch selection unit is electrically connected with the output end of the qth switch unit.

[0021] In one embodiment, the control module is configured to control the qth switch unit to switch the on-off state when the ith antenna is working, so that the input end of the qth switch unit is electrically connected with the ith power detection unit, and the control module is electrically connected with the ith power detection unit.

[0022] In one embodiment, the control module and the switch module are electrically connected with the radio frequency module.

[0023] The power detection module is configured to detect the forward power and the reverse power of any antenna when the power detection module is electrically connected with the control module, and send the forward power and the reverse power to the control module via the switch module and the radio frequency module.

[0024] In one embodiment, the power detection module is in a microstrip line structure or a stripline structure, and is arranged on a mainboard of the terminal device.

[0025] The first aspect of the embodiments of the present application provides a standing wave detection circuit. By arranging the power detection module and the antenna module apart or electrically connecting the power detection module and the antenna module, the forward power and the reverse power of the antenna can be directly obtained by the power detection module, and the accuracy of power detection is improved. By electrically connecting the power detection module and the control module through the switch module, the forward power and the reverse power of the working antenna can be sent to the control module by the power detection module, and the forward power and the reverse power of the non-working antenna are prevented from being sent to the control module, so that the signal interference or electromagnetic interference of the non-working antenna is reduced, and the accuracy of power detection of the working antenna is further improved, so that the accuracy of obtaining the standing wave ratio of the antenna is improved.

[0026] The second aspect of the embodiments of the present application provides a standing wave detection method applied to the standing wave detection circuit provided in the first aspect of the embodiments of the present application. The method comprises the following steps.

[0027] When any antenna in the antenna module is working, the switch module is controlled to be turned on to be electrically connected with the power detection module, so that the forward power and the reverse power of the any antenna are detected by the power detection module.

[0028] The forward power and the reverse power of the any antenna sent by the power detection module via the switch module are received.

[0029] According to the forward power and the reverse power of the any antenna, the standing wave ratio of the any antenna is obtained to obtain the working state of the any antenna.

[0030] The third aspect of the embodiments of the present application provides a terminal device, comprising the standing wave detection circuit, the radio frequency module and the antenna module provided by the first aspect of the embodiments of the present application connected in sequence.

[0031] It can be understood that the beneficial effects of the second aspect and the third aspect can be referred to the related description in the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 is the first structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0034] Figure 2 is the second structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0035] Figure 3 is the structure schematic diagram of the power detection module adopting the microstrip line structure and arranged on the mainboard of the terminal device provided by the embodiments of the present application;

[0036] Figure 4 is the structure schematic diagram of the power detection module adopting the stripline structure and arranged on the mainboard of the terminal device provided by the embodiments of the present application;

[0037] Figure 5 is the third structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0038] Figure 6 is the fourth structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0039] Figure 7 is the fifth structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0040] Figure 8 is the sixth structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0041] Figure 9 is the seventh structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0042] Figure 10 is the eighth structure schematic diagram of the terminal device provided by the embodiments of the present application;

[0043] Figure 11 Fig. 9 is a ninth structural schematic diagram of a terminal device provided by an embodiment of the present application;

[0044] Figure 12 Fig. 1 is a first flow schematic diagram of a standing wave detection method provided by an embodiment of the present application;

[0045] Figure 13 Fig. 2 is a second flow schematic diagram of a standing wave detection method provided by an embodiment of the present application;

[0046] Figure 14 Fig. 3 is a timing schematic diagram of a control module acquiring forward power, reverse power and standing wave ratio according to a preset polling time provided by an embodiment of the present application. DETAILED DESCRIPTION

[0047] In the following description, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the present application. However, persons having ordinary skill in the art will appreciate that embodiments of the present application can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail in order to avoid obscuring the present application.

[0048] It should be understood that the term "comprises" when used in this specification and the appended claims indicates the presence of the described features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0049] It should also be understood that the term "and / or" when used in this specification and the appended claims indicates that the associated listed items can be present one or more of the associated listed items, and that the use of "and / or" in the specification and the claims is not intended to mean that the associated listed items are mutually exclusive.

[0050] As used in this specification and the appended claims, the term "if" can be construed to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be construed to mean "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]," depending on the context.

[0051] In addition, the terms "first", "second", "third", etc. are used herein only to distinguish one element from another, and do not imply or suggest a relative importance.

[0052] Reference within the specification of this application to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places within specified

[0053] In applications, at present, terminal equipment is limited by the mainboard space of fixed architecture (such as Qualcomm platform or MediaTek platform of Mediatek) and can only obtain the power of the power amplifier for the antenna, and there are duplexers, switches and filters and other elements between the antenna and the power amplifier, so that there is a deviation between the power of the power amplifier and the power of the antenna, which leads to inaccurate power detection, so that the obtained standing wave ratio of the antenna is inaccurate, and the working state of the antenna cannot be accurately obtained. Therefore, how to accurately obtain the standing wave ratio of the antenna has become a problem to be solved at present.

[0054] In addition, generally, when obtaining the power of the power amplifier, only the forward power of the power amplifier is obtained, and the standing wave ratio of the power amplifier cannot be calculated according to the forward power and the reverse power. If the reverse power is obtained by calculation, it is easy to cause calculation error, which leads to driving the antenna with too high forward power or reverse power, causing element burnout, affecting the stability of the antenna operation and existing safety hazards.

[0055] In view of the above technical problems, the embodiment of the application provides a standing wave detection circuit, by spacing the power detection module and the antenna module, or electrically connecting the power detection module and the antenna module, the forward power and the reverse power of the antenna can be directly obtained by the power detection module, the accuracy of power detection is improved; and by forming an electrical connection between the power detection module and the control module through the switch module, the forward power and the reverse power of the antenna in operation can be ensured to be sent by the power detection module to the control module, avoiding sending the forward power and the reverse power of the antenna not in operation to the control module, which can reduce the signal interference or electromagnetic interference of the antenna not in operation, further improve the power detection accuracy of the antenna in operation, and improve the accuracy of obtaining the standing wave ratio of the antenna.

[0056] The standing wave detection circuit provided by the embodiments of the present application can be applied to a terminal device. The terminal device can be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), and the like. The embodiments of the present application do not limit the specific type of the terminal device.

[0057] Figure 1 An exemplary structure diagram of a terminal device 100 is shown. The terminal device 100 can include a processor 10, a memory 20, a power module 30, an audio module 40, a camera module 50, a sensor module 60, an input module 70, a display module 80, and a wireless communication module 90, and the like. The audio module 40 can include a speaker 41 and a microphone 42, and the like. The camera module 50 can include a short-focus camera 51, a long-focus camera 52, and a flash 53, and the like. The sensor module 60 can include an infrared sensor 61, an acceleration sensor 62, a position sensor 63, a fingerprint sensor 64, and an iris sensor 65, and the like. The input module 70 can include a touch panel 71 and an external input unit 72, and the like. The wireless communication module 90 can include a Bluetooth, optical wireless communication (Optical Wireless), mobile communication (Mobile Communications), wireless local area network (WLAN), near field communication (Near Field Communication, NFC), and ZigBee, and the like.

[0058] In applications, the processor 10 can be a central processing unit (CPU). The processor can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, and the like. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0059] In applications, memory 20 may be an internal storage unit of the terminal device in some embodiments, such as a hard drive or RAM. In other embodiments, memory 20 may be an external storage device of the terminal device, such as a plug-in hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., provided on the terminal device. Furthermore, memory 20 may include both internal and external storage units of the terminal device. Memory 20 is used to store the operating system, applications, bootloader, data, and other programs, such as program code for computer programs. Memory 20 can also be used to temporarily store data that has been output or will be output.

[0060] In the application, the display module 80 can be a flat screen, a curved screen, or a flexible screen. Specifically, it can be a foldable screen. A foldable screen can include at least one flexible screen, or a foldable screen can include at least one flexible screen and at least one flat screen or a curved screen. This application embodiment does not impose any restrictions on the specific type of the display module 80.

[0061] In applications, the mobile communication unit in the wireless communication module 90 can send mobile communication signals of corresponding communication standards based on various mobile communication technologies such as 2nd-generation mobile communication technology (2G), 3rd-generation mobile communication technology (3G), 4th-generation mobile communication technology (4G), or 5th-generation mobile communication technology (5G). Each wireless communication unit in the wireless communication module 90 can send corresponding types of communication signals through corresponding antennas. In this application embodiment, no restrictions are placed on the type and number of antennas included in the antenna communication module 90.

[0062] like Figure 2 As shown, the standing wave detection circuit 200 provided in this application embodiment is applied to a terminal device 100. The terminal device includes a radio frequency module 110 and an antenna module 120. The antenna module 120 includes at least one antenna 121. The standing wave detection circuit 200 includes a power detection module 210, a switch module 220 and a control module 230 connected in sequence.

[0063] The control module 230 and the radio frequency module 110 are electrically connected;

[0064] The control module 230 is used to control the switch module 220 to be turned on when any antenna in the antenna module 120 is working, so as to be electrically connected to the power detection module 210;

[0065] The power detection module 210 is configured to detect the forward power and the reverse power of any antenna when electrically connected with the control module 230, and send to the control module 230 via the switch module 220;

[0066] The control module 230 is configured to obtain the standing wave ratio of any antenna according to the forward power and the reverse power of any antenna, to obtain the working state of any antenna.

[0067] In application, the radio frequency module 110 can include a transceiver, a power amplifier, a low noise amplifier (LNA), a duplexer, a filter, an antenna switch module (ASM), and the like. The radio frequency module 110 is configured to process the radio frequency signal, so that the radio frequency signal can be transmitted through the antenna module 120 with preset parameters such as a preset frequency band, a preset uplink transmission power, and a preset signal-to-noise ratio. The embodiments of the present application do not make any limitation on the number of elements included in the radio frequency module 110, the type of elements, and the connection relationship of each element.

[0068] In application, the antenna module 120 can include at least one antenna, and the types of radio frequency signals of different antennas can be different. The types of radio frequency signals can include a Bluetooth signal, a wireless local area network signal, a mobile communication signal, a near field communication signal, and a Zigbee protocol signal, etc. The frequency bands of the radio frequency signals transmitted by different antennas can be different. The embodiments of the present application do not make any limitation on the number of antennas of the antenna module 120, the type and frequency band of the radio frequency signal transmitted by each antenna.

[0069] In application, the control module 230 can be a baseband chip. The baseband chip can specifically include a baseband processor, a channel encoder, a digital signal processor, a modem, an interface unit, and the like. The functions of each element of the baseband chip are described as follows:

[0070] The baseband processor is configured to control and manage the radio frequency function of the terminal device, including timing control, digital system control, radio frequency control, frequency hopping control, power saving control, and man-machine interface control, etc. Specifically, the baseband processor can send different types of signals to the radio frequency module 110 to realize the above different radio frequency functions. For example, a Bluetooth control signal can control the radio frequency module 110 to transmit a Bluetooth signal through a specified antenna and a specified frequency. A mobile communication control signal can control the radio frequency module 110 to transmit a mobile communication signal through a specified antenna, a specified communication standard, a specified frequency, and a specified frequency band, etc.

[0071] The channel encoder is configured to perform channel coding (which can improve the anti-interference capability of the radio frequency signal during transmission), encryption, etc. on the radio frequency signal. The channel coding can be implemented based on convolutional coding, Fire code coding, parity check code, interleaving, or burst pulse formatting.

[0072] The digital signal processor is configured to perform channel equalization on the radio frequency signal transmitted in the form of a digital signal through an algorithm (e.g., Viterbi algorithm), which can eliminate or weaken the problem of inter-symbol interference caused by multipath time delay during transmission of the radio frequency signal.

[0073] The interface unit can include an analog interface, a digital interface, and an auxiliary interface. Specifically, the analog interface can include an audio input analog interface, an audio output analog interface, or a radio frequency control analog interface, etc. The digital interface can include a memory digital interface or a SIM (Subscriber Identity Module) digital interface, etc. The auxiliary interface can include an audio input auxiliary interface, an audio output auxiliary interface, and a battery management system auxiliary interface, etc. The embodiments of the present application do not make any limitation on the specific types of the interface unit.

[0074] In applications, the control module 230 can send a radio frequency control signal to the radio frequency module 110, so that the radio frequency module 110 generates a radio frequency signal and controls any one or more antennas in the antenna module 120 to emit the radio frequency signal according to the radio frequency control signal. The power of the antenna when emitting the radio frequency signal is the forward power. When any one or more antennas in the antenna module 120 receive a radio frequency signal sent by a base station or other radio frequency signal emitting device, the control module 230 can receive the radio frequency signal via the antenna module 120 and the radio frequency module 110. The power of the antenna when receiving the radio frequency signal is the reverse power.

[0075] It should be noted that any antenna in the antenna module 120 can receive a radio frequency signal sent by a base station or other radio frequency signal emitting device after emitting the radio frequency signal, i.e., the transmission and reception of the radio frequency signal are completed through one antenna. Alternatively, the radio frequency signal sent by the base station or other radio frequency signal emitting device can be received by one antenna corresponding to any antenna, i.e., the transmission and reception of the radio frequency signal are completed through a group of antennas.

[0076] In application, the control module 230 can generate the switch control signal according to the radio frequency control signal. Specifically, when the control module 230 controls any one or any multiple antennas to emit the radio frequency signal through the radio frequency control signal, the control module 230 can generate the switch control signal according to the radio frequency control signal to control the switch module 220 to be turned on, so that the power detection module 210 and the control module 230 form an electrical connection. The power detection module 210 can detect the forward power and the reverse power of the working antenna in real time. After the power detection module 210 and the control module 230 form an electrical connection through the switch module 220, the power detection module 210 can send the forward power and the reverse power of the working antenna to the control module 230 through the switch module 220. Wherein, the above working antenna is the antenna controlled by the control module 230 through the radio frequency control signal.

[0077] It should be noted that when the control module 230 does not send the radio frequency control signal to the radio frequency module 110, the control module 230 will not generate the switch control signal according to the radio frequency control signal. At this time, the switch module 220 remains disconnected, so that the power detection module 210 and the control module 230 remain disconnected. By controlling the power detection module 210 and the control module 230 to form an electrical connection through the switch module 220, it can be ensured that the power detection module 210 sends the forward power and the reverse power of the working antenna to the control module 230, avoiding sending the forward power and the reverse power of the non-working antenna to the control module 230, which can reduce the signal interference or electromagnetic interference of the non-working antenna and improve the power detection accuracy of the working antenna.

[0078] In application, the power detection module 210 can sample the radio frequency signal or obtain the pilot signal in the radio frequency signal when the antenna emits or receives the radio frequency signal, so as to detect the forward power and the reverse power of the working antenna in real time. The power detection module 210 can be spaced apart from the antenna module 120 or connected with the antenna module 120. Wherein, the connection relationship between the power detection module 210 and the antenna module 120 is determined according to the circuit type of the power detection module 210.

[0079] Specifically, the power detection module 210 can include at least one coupler, each coupler can be spaced apart from one or more corresponding antennas, and each coupler is used to obtain the forward power and the reverse power of the corresponding one or more antennas; or the power detection module 210 can include a power detection chip or a power detector carrying a power detection chip, and the power detection chip and the power detector can be connected with each antenna to obtain the forward power and the reverse power of the working antenna.

[0080] In one embodiment, the power detection module 210 is a microstrip line structure or a strip line structure and is arranged on the mainboard of the terminal device.

[0081] In application, the microstrip line structure refers to a strip-shaped trace arranged on the surface of a printed circuit board (PCB), and the strip line structure refers to a strip-shaped trace arranged inside the PCB. The microstrip line structure and the strip line structure are described below in combination with Figure 3 and Figure 4

[0082] Figure 3 An exemplary schematic diagram of the power detection module 210 adopting the microstrip line structure and arranged on the mainboard 130 of the terminal device 100 is shown. The mainboard 130 of the terminal device 100 adopts a double-layer structure including an insulating dielectric layer 131 and a conductor layer 132. The insulating dielectric layer 131 covers the conductor layer 132, and the power detection module 210 covers the insulating dielectric layer 131.

[0083] Figure 4 An exemplary schematic diagram of the power detection module 210 adopting the strip line structure and arranged on the mainboard 130 of the terminal device 100 is shown. The mainboard 130 of the terminal device 100 adopts a three-layer structure including an insulating dielectric layer 131, a first conductor layer 133, and a second conductor layer 134. The insulating dielectric layer 131 covers the first conductor layer 133, and the second conductor layer 134 covers the insulating dielectric layer. The power detection module 210 is embedded in the insulating dielectric layer 131. It should be noted that the power detection module 210 adopting the strip line structure can be applied to the mainboard 130 adopting the three-layer structure or the mainboard 130 adopting the double-layer structure described above. The trace structure adopted by the power detection module 210 can be determined according to the structure of the mainboard 130 of the terminal device 100, and the embodiments of the present application do not limit the trace structure of the power detection module 210.

[0084] In application, the power detection module 210 adopts the microstrip line structure or the strip line structure for tracing. Compared with tracing on the conductor layer, the power detection module 210 has the advantages of small line volume, light weight, and thin profile, and can reduce the occupancy of the mainboard space, so that the power detection module 210 can be installed at the antenna end under the limitation of the fixed architecture of the mainboard space, and the forward power and the reverse power of the antenna can be obtained. The power detection module 210 also has the advantages of high reliability, low manufacturing cost, and strong anti-interference ability, and can improve the accuracy of power detection and reduce the production cost of the terminal device.

[0085] ​In applications, the control module 230 can determine the working state of any of the antennas according to the standing wave ratio of any of the antennas. Specifically, when the standing wave ratio of any of the antennas is greater than a preset standing wave ratio, it indicates that the impedance matching of the antenna is poor, and the antenna generates a large energy loss when transmitting a radio frequency signal; when the standing wave ratio of any of the antennas is less than or equal to the preset standing wave ratio, it indicates that the impedance matching of the antenna is good, and the antenna does not generate a large energy loss when transmitting a radio frequency signal. The specific value of the preset standing wave ratio can be set according to actual needs, and can be 1.1, 1.2, or 1.3, etc.

[0086] In applications, when the standing wave ratio of any of the antennas is greater than the preset standing wave ratio, the control module 230 can adjust the forward power of any of the antennas in real time according to the difference between the standing wave ratio of any of the antennas and the preset standing wave ratio, which can be achieved by adjusting the uplink transmission power, so as to prevent the forward power or the reverse power from decreasing too much due to excessive energy loss, causing the power amplifier in the radio frequency module 110 to excessively amplify the forward power or the reverse power, resulting in failure or damage of the power amplifier, and causing the radio frequency module 110 and the antenna module 120 of the terminal device to fail, thereby improving the working stability of the radio frequency module 110 and the antenna module 120. In addition, by adjusting the forward power of any of the antennas in real time, the standing wave ratio of any of the antennas can be reduced, which can improve the working efficiency of any of the antennas, thereby improving the total radiated power (TRP) and the total isotropic sensitivity (TIS) of the antenna module 120, and further improving the working efficiency of the antenna module 120 and the sensitivity of radio frequency signal transmission and reception.

[0087] In one embodiment, the control module 230 is configured to obtain the standing wave ratio of any of the antennas according to the forward power and the reverse power of any of the antennas, and the control module 230 comprises:

[0088] The control module 230 is configured to obtain the power difference between the reverse power and the forward power according to the forward power and the reverse power of any of the antennas.

[0089] The control module 230 is configured to obtain the reflection coefficient according to the power difference between the reverse power and the forward power.

[0090] The control module 230 is configured to obtain the standing wave ratio of any of the antennas according to the reflection coefficient.

[0091] In applications, the calculation formula for obtaining the power difference between the reverse power and the forward power can be:

[0092] RL i = REV i - FWD i ;

[0093] wherein, RL i represents the power difference of the reverse power and the forward power of the i-th antenna, REV i represents the reverse power of the i-th antenna, FWD i represents the forward power of the i-th antenna.

[0094] In application, according to the power difference of the reverse power and the forward power, the calculation formula of the reflection coefficient can be:

[0095]

[0096] wherein, Γ i represents the reflection coefficient of the i-th antenna.

[0097] In application, according to the reflection coefficient, the calculation formula of the standing wave ratio of any one of the antennas can be:

[0098]

[0099] wherein, VSWR i represents the standing wave ratio of the i-th antenna.

[0100] It should be noted that the calculation steps and the calculation formula of the standing wave ratio of the antennas are only exemplary, and the embodiments of the present application do not limit the calculation steps and the calculation formula of the standing wave ratio.

[0101] Figure 5 The control module 230 and the switch module 220 are provided with the radio frequency module 110, and the power detection module 210 is used to detect the forward power and the reverse power of any one of the antennas when electrically connected with the control module 230, and transmit to the control module 230 via the switch module 220 and the radio frequency module 110.

[0102] In application, the power detection module 210 can form an electrical connection with the control module 230 via the switch module 220, and the obtained forward power and reverse power of the antennas are transmitted to the control module 230 via the switch module 220; or form an electrical connection with the control module 230 via the switch module 220 and the radio frequency module 110, and the obtained forward power and reverse power of the antennas are transmitted to the control module 230 via the switch module 220 and the radio frequency module 110, and the embodiments of the present application do not limit the connection relationship between the power detection module 210 and the control module 230.

[0103] In application, by arranging the power detection module 210 and the antenna module 120 apart or electrically connecting the power detection module 210 and the antenna module 120, the forward power and the reverse power of the antenna can be directly obtained by the power detection module 210, and the accuracy of power detection is improved; and by controlling the power detection module 210 and the control module 230 to form electrical connection through the switch module 220, the forward power and the reverse power of the antenna in operation can be sent to the control module 230 by the power detection module 210, and the forward power and the reverse power of the antenna not in operation are avoided to be sent to the control module 230, the signal interference or electromagnetic interference of the antenna not in operation can be reduced, and the accuracy of power detection of the antenna in operation is further improved, so as to improve the accuracy of obtaining the VSWR of the antenna.

[0104] As shown in Figure 6 or Figure 7 corresponding to the embodiments based on Figure 2 or Figure 5 , when the antenna module 120 includes n antennas, the power detection module 210 includes n power detection units;

[0105] The control module 230 is configured to control the switch module 220 to be conductive when the i-th antenna is in operation, so as to be electrically connected with the i-th power detection unit;

[0106] The i-th power detection unit is configured to detect the forward power and the reverse power of the i-th antenna when being electrically connected with the control module 230, and send the forward power and the reverse power to the control module 230 through the switch module 220;

[0107] The control module 230 is configured to obtain the VSWR of the i-th antenna according to the forward power and the reverse power of the i-th antenna, so as to obtain the working state of the i-th antenna;

[0108] Wherein, n is a positive integer, i = 1, 2, …, n.

[0109] It should be noted that, Figure 6 and Figure 7 The difference between the embodiments corresponding to Figure 6 , the i-th power detection unit sends the forward power and the reverse power to the control module 230 through the switch module 220, Figure 7 , the i-th power detection unit sends the forward power and the reverse power to the control module 230 through the switch module 220 and the radio frequency module 110, and the signal transmission mode between the i-th detection unit and the control module 230 is not limited in the embodiments of the present application. The correspondence between the n antennas and the n power detection units and the working principle will be described based on Figure 6 and Figure 7 :

[0110] In application, Figure 6 andFigure 7 The example shows that the antenna module 120 includes the first antenna 121, the second antenna 122, the third antenna 123, and the fourth antenna 124, and the power detection module 210 includes the first power detection unit 211, the second power detection unit 212, the third power detection unit 213, and the fourth power detection unit 214. The first antenna 121 to the fourth antenna 124 are respectively and correspondingly arranged in intervals (as shown in Figure 6 and Figure 7 or electrically connected.

[0111] The working principle is described by taking the first power detection unit 211 and the first antenna 121 as an example. The first power detection unit 211 can be arranged in intervals with the first antenna 121 or connected with the first antenna 121 to obtain the forward power and the directional power of the first antenna 121. It should be noted that the first antenna 121 generally does not receive a radio frequency signal when transmitting a radio frequency signal, and does not transmit a radio frequency signal when receiving a radio frequency signal, so as to avoid interference caused by simultaneous transmission and reception of radio frequency signals, that is, the first antenna 121 will switch between the two working modes of transmitting a radio frequency signal and receiving a radio frequency signal, and the first power detection unit 211 can perform power detection according to the working mode of the first antenna 121, that is, the first power detection unit 211 can detect the forward power when the first antenna 121 transmits a radio frequency signal, and detect the reverse power when the first antenna 121 receives a radio frequency signal; or, the working mode of the first antenna 121 at different time sequences can be determined by the control module 230 analyzing a radio frequency control signal, so as to determine whether the power obtained by the first power detection unit 211 at different time sequences is forward power or reverse power.

[0112] As shown in Figure 8 or Figure 9 Based on the corresponding embodiment of Figure 6 , the switch module 220 includes a switch selection unit 221 and n / k switch units;

[0113] The output end Out of the switch selection unit 221, the control end Ctr of the switch selection unit 221, and the control end Ctr of the n / k switch units are electrically connected with the control module 230;

[0114] The input end In of the switch selection unit 221 is used for being electrically connected with the output end Out of any one of the n / k switch units according to the control of the control module 230;

[0115] The input end In of the qth switch unit is used for being electrically connected with any one of the (q-1)*k+1 power detection unit to the q*k power detection unit according to the control of the control module 230;

[0116] wherein k is a positive integer, k is less than n and n is an integer multiple of k; q = 1, 2, …, n / k; i ∈ [(q-1)*k+1, q*k].

[0117] In application, the switch unit can be an electronic switch or a mechanical switch, and specifically can be a single-knife k-pole switch. The selection of the switch selection unit 221 is consistent with the selection of the switch unit described above, and will not be described here again. The embodiments of the present application do not make any limitation on the specific selection of the switch unit and the switch selection unit 221. Figure 8 An exemplary structural schematic diagram is shown when the switch unit and the switch selection unit 221 are electronic switches;

[0118] Figure 9 An exemplary structural schematic diagram is shown when the switch unit and the switch selection unit 221 are mechanical switches and the power detection unit is a coupler. When the power detection unit is a coupler, each coupler includes a forward power output end Out and a reverse power output end Out. The forward power output end Out and the reverse power output end Out of each coupler are used to be connected with the input end In of the qth switch unit. Therefore, the qth switch unit includes k input ends In, so as to be connected with the (q-1)*k+1th power detection unit to the qth power detection unit. Figure 9 For example, the input end In of the 1st switch unit 222 can be divided into the 1st input end In to the 4th input end In from top to bottom. The 1st input end In is used to be connected with the forward power output end Out of the 1st power detection unit 211. The 2nd input end In is used to be connected with the reverse power output end Out of the 1st power detection unit 211. The 3rd input end In is used to be connected with the reverse power output end Out of the 2nd power detection unit 212. The 4th input end In is used to be connected with the forward power output end Out of the 2nd power detection unit 212. The connection relationship between the 2nd switch unit 223 and the 3rd power detection unit 213 and the 4th power detection unit 214 can refer to the connection relationship between the 1st switch unit 222 and the 1st power detection unit 211 and the 2nd power detection unit 212, which will not be described here again.

[0119] In application, the control module 230 can send a first switch control signal to the control end Ctr of the switch selection unit 221 to control the switch selection unit 221 to switch the input end In, so as to be electrically connected with the output end Out of any one of the n / k switch units; or, the control module 230 can control the switch selection unit 221 to be disconnected, so as to be disconnected with the n / k switch units. The control module 230 can also send a second switch control signal to the control end Ctr of the qth switch unit to control the qth switch unit to switch the input end In, so as to be electrically connected with any one of the (q-1)*k+1th power detection unit to the qth power detection unit; or, the control module 230 can control the qth switch unit to be disconnected, so as to be disconnected with the (q-1)*k+1th power detection unit to the qth power detection unit.

[0120] In application, the switch module 220 is described below with n = 4 and k = 2 as an example, the switch module 220 includes a switch selection unit 221 and two switch units, which are a first switch unit 222 and a second switch unit 223. The input end In of the first switch unit 222 is electrically connected with any one of the first power detection unit 211 to the second power detection unit 212 according to the control of the control module 230. The input end In of the second switch unit 223 is electrically connected with any one of the third power detection unit 213 to the fourth power detection unit 214 according to the control of the control module 230.

[0121] In an embodiment, the control module 230 is configured to control the switch selection unit 221 to switch the on-off state when the i-th antenna is working, so that the input end In of the switch selection unit 221 is electrically connected with the output end Out of the q-th switch unit.

[0122] In application, assuming i = 1 and k = 2, according to i ∈ [(q-1)*k+1, q*k], q = 1 can be obtained. When the control module 230 controls the first antenna 121 to work through the radio frequency control signal, the control module 230 can send a first switch control signal to the control end Ctr of the switch selection unit 221 to control the switch selection unit 221 to switch the on-off state, so that the input end In of the switch selection unit 221 is electrically connected with the output end Out of the first switch unit 222, thereby electrically connecting the output end Out of the first switch unit 222 with the control module 230.

[0123] In an embodiment, the control module 230 is configured to control the q-th switch unit to switch the on-off state when the i-th antenna is working, so that the input end In of the q-th switch unit is electrically connected with the i-th power detection unit, thereby electrically connecting the control module 230 with the i-th power detection unit.

[0124] In application, assuming i = 1 and k = 2, according to i ∈ [(q-1)*k+1, q*k], q = 1 can be obtained. When the control module 230 controls the first antenna 121 to work through the radio frequency control signal, the control module 230 can send a second switch control signal to the control end Ctr of the first switch unit 222 to control the first switch unit 222 to switch the on-off state, so that the input end In of the first switch unit 222 is electrically connected with the first power detection unit 211, thereby electrically connecting the control module 230 with the first power detection unit 211 through the switch selection unit 221 and the first switch unit 222.

[0125] In application, by controlling the input end In of the switch selection unit 221 and the output end Out of any one of the n / k switch units to be electrically connected, when the control module 230 is electrically connected with the qth switch unit, the control module 230 can be kept disconnected with the switch units other than the qth switch unit, thereby keeping the power detection units other than the (q-1)*k+1 power detection unit to the q*k power detection unit disconnected, so as to improve the anti-interference ability of power detection; by controlling the input end In of the qth switch unit and any one of the (q-1)*k+1 power detection unit to the q*k power detection unit to be electrically connected, when the qth switch unit is electrically connected with the above-mentioned any one power detection unit, the qth switch unit can be kept disconnected with the power detection units other than the above-mentioned any one power detection unit, so as to further improve the anti-interference ability of power detection; by controlling the on-off state of the switch selection unit 221 and the qth switch unit by the control module 230, the control module 230 and any one of the n power detection units can be electrically connected, so that when the ith antenna works, the control module 230 can be electrically connected with the ith power detection unit in real time, and the flexibility of power detection can be improved while ensuring the anti-interference ability of power detection.

[0126] As shown in Figure 10 or Figure 11 based on Figure 7 the corresponding embodiments, the switch module 220 includes a switch selection unit 221 and n / k switch units;

[0127] The output end Out of the switch selection unit 221, the control end Ctr of the switch selection unit 221 and the control end Ctr of the n / k switch units are electrically connected with the radio frequency module 110;

[0128] The input end In of the switch selection unit 221 is used to receive the control of the control module 230 via the radio frequency module 110, and is electrically connected with the output end Out of any one of the n / k switch units;

[0129] The input end In of the qth switch unit is used to receive the control of the control module 230 via the radio frequency module 110, and is electrically connected with any one of the (q-1)*k+1 power detection unit to the q*k power detection unit;

[0130] Wherein, k is a positive integer, k is less than n and n is an integer multiple of k; q=1, 2, …, n / k; i∈[(q-1)*k+1, q*k].

[0131] In application, the circuit control principle between the control module 230, the switch selection unit 221 and the qth switch unit can refer to Figure 8 or Figure 9The corresponding embodiment is not described here. The difference is that the control module 230 sends the first switch control signal and the second switch control signal to the radio frequency module 110. The radio frequency module 110 can control the input end In of the switch selection unit 221 and the input end In of the switch unit by forwarding the first switch control signal to the control end Ctr of the switch selection unit 221 and forwarding the second switch control signal to the control end Ctr of the switch unit; the radio frequency module 110 can also obtain the third switch control signal by transcoding, decoding and other processing of the first switch control signal, and send the third switch control signal to the control end Ctr of the switch selection unit 221, and obtain the fourth switch control signal by transcoding, decoding and other processing of the second switch control signal, and send the fourth switch control signal to the control end Ctr of the switch unit. The first switch control signal to the fourth switch control signal can be sent to the switch selection unit 221 and the switch unit through the mobile industry processor interface (Mobile Industry Processor Interface, MIPI) or general-purpose input / output interface (General-Purpose Input / Output, GPIO) of the transceiver of the radio frequency module 110.

[0132] In application, the switch selection unit and the qth switch unit can be directly controlled by the control module, or indirectly controlled by the control module controlling the radio frequency module, which improves the flexibility of the waveguide of the standing wave detection circuit, and enables the terminal device to adjust the waveguide of the standing wave detection circuit according to actual waveguide needs.

[0133] As shown in Figure 12 The standing wave detection method provided by the embodiment of the application is applied to the control module of the standing wave detection circuit provided by the above embodiment, and includes the following steps S1201 to S1203:

[0134] In step S1201, when any antenna in the antenna module is working, the switch module is controlled to be turned on to be electrically connected with the power detection module to detect the forward power and the reverse power of any antenna through the power detection module.

[0135] In step S1202, the forward power and the reverse power of any antenna sent by the power detection module through the switch module are received.

[0136] In step S1203, the standing wave ratio of any antenna is obtained according to the forward power and the reverse power of any antenna to obtain the working state of any antenna.

[0137] In application, the functions realized by the control module in steps S1201 to S1203 can refer to the related descriptions in the above embodiments, which are not described here.

[0138] As Figure 13 shown in the figure, in one embodiment, based on Figure 9 the corresponding embodiment, the method comprises the following steps S1301 to S1303:

[0139] Step S1301, according to the preset polling time of the antenna module, the switch module is controlled to be turned on to be electrically connected with the power detection module, so as to detect the forward power and the reverse power of any antenna through the power detection module; wherein, the preset polling time is used to control the working time sequence of each antenna of the antenna module.

[0140] In application, the user can set the preset polling time according to actual needs and store it to the control module, or send the preset polling time to the control module. The preset polling time is used to control the working time sequence of each antenna of the antenna module, which can specifically control the broadcast period of each antenna, and the active working time and the inactive working time in each broadcast period. In the active working time of any antenna, the above-mentioned any antenna will transmit and receive radio frequency signals, thereby generating forward power and reverse power; in the inactive working time of any antenna, the above-mentioned any antenna does not perform the transmission and reception of radio frequency signals, and does not generate forward power and reverse power.

[0141] In application, the control module can control the switch module to be turned on to be electrically connected with the qth power detection unit corresponding to the ith antenna according to the preset polling time of the antenna module when the ith antenna enters the broadcast period, or when the ith antenna enters the active working time, so as to detect the forward power and the reverse power of the ith antenna through the qth power detection unit.

[0142] Step S1302, receiving the forward power and the reverse power of any antenna sent by the power detection module through the switch module.

[0143] In application, the standing wave detection method of step S1302 is consistent with the standing wave detection method provided in the above-mentioned step S1202, which will not be described here.

[0144] Step S1303, according to the forward power and the reverse power of any antenna, the standing wave ratio of any antenna is obtained to obtain the working state of any antenna.

[0145] In application, the control module can calculate the standing wave ratio of the ith antenna according to the forward power and the reverse power of any antenna after the ith antenna enters the inactive working time, to obtain the working state of the ith antenna. The calculation method of the standing wave ratio of the ith antenna can refer to the related description in the above-mentioned embodiment, which will not be described here.

[0146] For example, assuming that the preset polling time is set as: the broadcast period of each antenna is 80 ms, the 1st antenna to the nth antenna works in turn, the active working time of each antenna is 10 ms, and the idle working time is 70 ms, the control module can acquire the forward power and the reverse power of the 1st antenna in the 0th ms to the 10th ms, and acquire the VSWR of the 1st antenna in the 10th ms to the 80th ms; acquire the forward power and the reverse power of the 2nd antenna in the 80th ms to the 90th ms, and acquire the VSWR of the 2nd antenna in the 90th ms to the 160th ms. The power detection method of the 3rd antenna to the nth antenna can refer to the power detection method of the 1st antenna and the 2nd antenna, which will not be described herein.

[0147] Figure 14 An exemplary timing diagram for acquiring the forward power, the reverse power and the VSWR according to the preset polling time by the control module is shown. The control module can acquire the forward power first and then acquire the reverse power, or acquire the reverse power first and then acquire the forward power according to the actual working mode of the i th antenna.

[0148] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0149] The computer readable storage medium of the embodiments of the present application also stores a computer program, and the computer program can implement the steps in each VSWR detection method embodiment when executed by a processor.

[0150] The integrated module, if realized in the form of a software function module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. The computer program can implement the steps of each method embodiment when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable storage medium at least includes any entity or device capable of carrying the computer program code to a photographing terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal and a software distribution medium. For example, a U disk, a mobile hard disk, a magnetic disk or an optical disk, etc.

[0151] In the above embodiments, the description of each embodiment is focused on, and the part not described or recorded in a certain embodiment can be referred to the relevant description of other embodiments.

[0152] Those skilled in the art can understand that the modules and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0153] In the embodiments provided in the present application, it should be understood that the disclosed terminal device and method can be implemented in other ways. For example, the terminal device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed mutually can be indirect coupling or communication connection through some interface, device or module, and can be electrical, mechanical or other forms.

[0154] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A standing wave detection circuit, characterized by, The application is applied to a terminal device, the terminal device comprises a radio frequency module and an antenna module, the antenna module comprises at least one antenna, the standing wave detection circuit comprises a power detection module, a switch module and a control module which are electrically connected in sequence; The control module is electrically connected with the radio frequency module, and the power detection module is spaced apart from the antenna module, or the power detection module is electrically connected with the antenna module; The control module is used for controlling the switch module to be turned on to be electrically connected with the power detection module when any antenna in the antenna module works. The power detection module is used for detecting the forward power and the reverse power of the any antenna and sending the forward power and the reverse power to the control module via the switch module when the power detection module is electrically connected with the control module. The control module is used for obtaining the standing wave ratio of the any antenna according to the forward power and the reverse power of the any antenna to obtain the working state of the any antenna. The power detection module is a microstrip line structure or a strip line structure and is arranged on a mainboard of the terminal device to realize the installation of the power detection module at the antenna end and further realize the acquisition of the forward power and the reverse power of the antenna.

2. The standing wave detection circuit of claim 1, wherein, When the antenna module comprises n antennas, the power detection module comprises n power detection units. The control module is used for controlling the switch module to be turned on to be electrically connected with the i-th power detection unit when the i-th antenna works. The i-th power detection unit is used for detecting the forward power and the reverse power of the i-th antenna and sending the forward power and the reverse power to the control module via the switch module when the i-th power detection unit is electrically connected with the control module. The control module is used for obtaining the standing wave ratio of the i-th antenna according to the forward power and the reverse power of the i-th antenna to obtain the working state of the i-th antenna. Wherein, n is a positive integer, i = 1, 2, …, n.

3. The standing wave detection circuit of claim 2, wherein, The switch module comprises a switch selection unit and n / k switch units. The output end of the switch selection unit, the control end of the switch selection unit and the control end of the n / k switch units are electrically connected with the control module. The input end of the switch selection unit is electrically connected with the output end of any switch unit in the n / k switch units according to the control of the control module. The input end of the q-th switch unit is electrically connected with any power detection unit in the (q-1)*k+1-th power detection unit to the q*k-th power detection unit according to the control of the control module. Wherein, k is a positive integer, k is less than n and n is an integer multiple of k; q = 1, 2, …, n / k; i ∈ [(q-1)*k+1, q*k].

4. The standing wave detection circuit of claim 3, wherein, The control module is used for controlling the switch selection unit to switch the on-off state to electrically connect the input end of the switch selection unit with the output end of the q-th switch unit when the i-th antenna works.

5. The standing wave detection circuit of claim 3, wherein, The control module is used for controlling the q-th switch unit to switch the on-off state to electrically connect the input end of the q-th switch unit with the i-th power detection unit to electrically connect the control module with the i-th power detection unit when the i-th antenna works.

6. The standing wave detection circuit of any one of claims 1 to 5, wherein, The radio frequency module is arranged between the control module and the switch module; The power detection module is configured to detect the forward power and the reverse power of the any antenna when electrically connected with the control module, and send the forward power and the reverse power to the control module via the switch module and the radio frequency module.

7. A standing wave detection method, characterized by, The method applied to the control module of the standing wave detection circuit according to any one of claims 1 to 6, the method comprises: controlling the switch module to be turned on to be electrically connected with the power detection module to detect the forward power and the reverse power of the any antenna in the antenna module when the any antenna works; receiving the forward power and the reverse power of the any antenna sent by the power detection module via the switch module; obtaining the standing wave ratio of the any antenna according to the forward power and the reverse power of the any antenna to obtain the working state of the any antenna.

8. The standing wave detection method of claim 7, wherein, The controlling the switch module to be turned on to be electrically connected with the power detection module to detect the forward power and the reverse power of the any antenna in the antenna module when the any antenna works comprises: controlling the switch module to be turned on to be electrically connected with the power detection module to detect the forward power and the reverse power of the any antenna according to the preset polling time of the antenna module, wherein the preset polling time is used to control the working time sequence of each antenna of the antenna module.

9. A terminal device, comprising: The standing wave detection circuit according to any one of claims 1 to 6, the radio frequency module and the antenna module are sequentially connected.

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