Signal transmitting and receiving device of wireless communication frequency band and mobile terminal

Abstract

The utility model discloses a signal transmitting and receiving device of a wireless communication frequency band and a mobile terminal, and belongs to the technical field of wireless communication, and the device comprises an antenna, a radio frequency transceiver, a processor, a first receiving radio frequency path, a second receiving radio frequency path, a first radio frequency switch and a second radio frequency switch, the first radio frequency switch comprises a first connecting port and a second connecting port; the first radio frequency switch is connected with the antenna and is used for transmitting a radio frequency signal received by the antenna to the radio frequency transceiver through the first connection port or the second connection port; the first connection port is connected with the first receiving radio frequency path; the second connection port is connected with the second receiving radio frequency path; the processor is connected with the radio frequency transceiver, and is used for judging the radio frequency signal based on a threshold value, and controlling the first radio frequency switch and the second radio frequency switch to switch on the first receiving radio frequency path through the processor under the condition that the signal strength of the radio frequency signal is not less than the threshold value; under the condition that the signal intensity of the radio frequency signal is smaller than the threshold value, the processor controls the first radio frequency switch and the second radio frequency switch to switch on a second receiving radio frequency path; the second radio frequency switch comprises a third connecting port and a fourth connecting port; the third connecting port is connected with the first receiving radio frequency path, and the fourth connecting port is connected with the second receiving radio frequency path.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to a signal transceiver device and a mobile terminal in a wireless communication frequency band. Background Art

[0002] In the current cellular time division duplexing (TDD) frequency band, in the design of the receiving path, in order to suppress the interference of strong out-of-band signals and prevent the interference signal from being too large and causing the low-noise amplifier to be blocked, it is necessary to add a receiving path filter in front of the low-noise amplifier in the receiving path to suppress the out-of-band signal interference.

[0003] In the prior art, adding a receiving filter does solve the problem of low noise amplifier blocking caused by strong out-of-band interference signals, but adding a receiving filter also increases the loss of the receiving path.

[0004] The existing signal receiving device at the near end of wireless communication cannot process the received signal according to the actual received signal situation, which leads to the decrease of the receiving sensitivity of the receiving device and the reduction of the receiving performance of the path. Summary of the invention

[0005] The present application provides a signal transceiver device and a mobile terminal in a wireless communication frequency band, which are used to solve the problem that a low noise amplifier may be blocked by a strong out-of-band interference signal, and that adding a receiving filter increases the loss of a receiving path, resulting in a decrease in receiving sensitivity.

[0006] In a first aspect, the present application provides a signal transceiver device in a wireless communication frequency band, comprising: an antenna, a radio frequency transceiver, a processor, a first receiving radio frequency path, a second receiving radio frequency path, a first radio frequency switch, and a second radio frequency switch, wherein:

[0007] The first RF switch includes a first connection port and a second connection port; the first RF switch is connected to the antenna, and is used to transmit the RF signal received by the antenna to the RF transceiver through the first connection port or the second connection port; the first connection port is connected to the first receiving RF path; the second connection port is connected to the second receiving RF path;

[0008] The processor is connected to the RF transceiver, and is used to judge the RF signal based on a threshold value. When the signal strength of the RF signal is not less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the first receiving RF path; when the signal strength of the RF signal is less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the second receiving RF path; the second RF switch includes a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path.

[0009] In some embodiments, the first receiving RF path includes a receiving filter and a first low noise amplifier, the input end of the receiving filter is connected to the first connection port, the output end of the receiving filter is connected to the input end of the first low noise amplifier, and the output end of the first low noise amplifier is connected to the third connection port.

[0010] In some embodiments, the signal transceiver device further includes a control circuit;

[0011] The second receiving radio frequency path includes a second low noise amplifier; an input end of the second low noise amplifier is connected to the second connection port, and an output end of the second low noise amplifier is connected to the fourth connection port.

[0012] In some embodiments, the radio frequency transceiver includes a frequency converter, and the processor includes an analog-to-digital converter and a digital signal processing chip, wherein:

[0013] The input end of the frequency converter is connected to the second RF switch, and the output end of the frequency converter is connected to the input end of the analog-to-digital converter, for performing frequency conversion processing on the RF signal to obtain a frequency conversion signal and sending the frequency conversion signal to the analog-to-digital converter;

[0014] The output end of the analog-to-digital converter is connected to the input end of the digital signal processing chip, and is used to perform analog-to-digital conversion on the frequency conversion signal to obtain a reference signal receiving power (RSRP) signal and send the RSRP signal to the digital signal processing chip;

[0015] The digital signal processing chip is used to judge the RSRP signal based on the threshold value, and determine that the radio frequency signal is a strong signal when the RSRP signal is not less than the threshold value;

[0016] Or, when the RSRP signal is less than the threshold value, it is determined that the radio frequency signal is a weak signal.

[0017] In some embodiments, the first radio frequency switch further includes a fifth connection port, and the signal transceiver device includes a transmission path;

[0018] The input end of the transmission path is connected to the radio frequency transceiver, and the output end of the transmission path is connected to the fifth connection port.

[0019] In some embodiments, the transmit path includes a transmit power amplifier and a transmit filter connected in sequence;

[0020] The input end of the transmission power amplifier is connected to the radio frequency transceiver, the output end of the transmission power amplifier is connected to the input end of the transmission filter, and the output end of the transmission filter is connected to the antenna through the fifth connection port.

[0021] In some embodiments, the radio frequency signal is a time division duplex (TDD) frequency band radio frequency signal.

[0022] In some embodiments, an input terminal of the first low noise amplifier is provided with an impedance matching an output terminal of the receiving filter.

[0023] In some embodiments, the input end of the transmit power amplifier is provided with an impedance matching the second connection port.

[0024] In a second aspect, the present application provides a mobile terminal, in which a printed circuit board PCB is arranged, and a signal transceiver device of a wireless communication frequency band as described in any one of the above items is arranged on the PCB.

[0025] The signal transceiver device and terminal of the wireless communication frequency band provided in the present application include an antenna, an RF transceiver, a processor, a first receiving RF path, a second receiving RF path, a first RF switch and a second RF switch; the first RF switch includes a first connection port and a second connection port; the first RF switch is connected to the antenna, and is used to transmit the RF signal received by the antenna to the RF transceiver through the first connection port or the second connection port; the first connection port is connected to the first receiving RF path; the second connection port is connected to the second receiving RF path; the processor is connected to the RF transceiver, and is used to judge the RF signal based on the threshold value, and when the signal strength of the RF signal is not less than the threshold value, the first RF switch and the second RF switch are controlled by the processor to connect the first receiving RF path; when the signal strength of the RF signal is less than the threshold value, the first RF switch and the second RF switch are controlled by the processor to connect the second receiving RF path; the second RF switch includes a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path. The signal transceiver device of the wireless communication frequency band of the present application selects the first receiving RF path or the second receiving RF path by switching the first RF switch and the second RF switch, which not only solves the problem of low noise amplifier blocking caused by strong out-of-band interference signals, but also solves the problem of increasing the receiving path loss and causing a decrease in receiving sensitivity by adding a receiving filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the structure of a signal transceiver device for a wireless communication frequency band provided in one embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0030] In some embodiments, the terminal (terminal device) includes various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, such as mobile phones, tablets, desktop notebooks, and smart devices that can run applications, including the central console of smart cars, etc. Specifically, it can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device. The terminal device may also be a satellite phone, a cellular phone, a smart phone, a wireless data card, a wireless modem, a machine type communication device, 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 function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted 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, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a terminal device in 5G network or future communication network, etc. The terminal may be powered by a battery, and may also be attached to and powered by the power system of a vehicle or ship. The power system of the vehicle or ship can also charge the battery of the terminal to extend the communication time of the terminal.

[0031] Figure 1 A schematic diagram of the structure of a signal transceiver device for a wireless communication frequency band provided by an embodiment of the present application; Figure 1 As shown, a signal transceiver device for a wireless communication frequency band is provided, including: an antenna 110, a radio frequency transceiver 120, a processor 130, a first receiving radio frequency path 140, a second receiving radio frequency path 150, a first radio frequency switch 160 and a second radio frequency switch 170. The device structure is only a possible implementation of the present application. Among them:

[0032] The first RF switch includes a first connection port and a second connection port; the first RF switch is connected to the antenna, and is used to transmit the RF signal received by the antenna to the RF transceiver through the first connection port or the second connection port; the first connection port is connected to the first receiving RF path; the second connection port is connected to the second receiving RF path;

[0033] Specifically, in the embodiment of the present application, each module in the transceiver is connected via a transmission line. Figure 1 As shown, the first RF switch is a three-throw switch, which is connected to the antenna through a transmission line. After receiving the RF signal sent by the antenna through the transmission line, the RF signal is sent to the RF transceiver through the first connection port or the second connection port. The first RF switch has three connection ports, such as Figure 1 As shown, the first RF switch 160 includes a switch terminal 1, a first connection port 2 and a second connection port 3. The first connection port is connected to the first receiving RF path 140, and the second connection port is connected to the second receiving RF path.

[0034] In a specific implementation, after the first RF switch receives the RF signal sent by the antenna, the first RF switch will default to connecting the first connection port through the switch end and connecting to the first receiving RF path. It should be noted that the output end of the first receiving RF path is connected to the second RF switch. The second RF switch of the present application has two connection ports, such as Figure 1 As shown in , the second RF switch 170 includes a switch port 1, a third connection port 2 and a fourth connection port 3. In a specific implementation, when the first RF switch receives the RF signal sent by the antenna for the first time, it is connected to the first receiving RF path by default through the first connection port of the first RF switch. In this case, the second RF switch is connected to the third connection port by default through the switch port, and transmits the RF signal passing through the first receiving RF path to the RF transceiver.

[0035] The processor is connected to the RF transceiver, and is used to judge the RF signal based on a threshold value. When the signal strength of the RF signal is not less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the first receiving RF path; when the signal strength of the RF signal is less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the second receiving RF path; the second RF switch includes a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path.

[0036] Specifically, the processor is connected to the RF transceiver, and the processor can judge the received RF signal based on a preset threshold value, and when the signal strength of the RF signal is not less than the threshold value, Figure 1 As shown, the processor controls the first RF switch and the second RF switch to connect the first receiving RF path through the control line. That is, when the signal strength of the RF signal is not less than the threshold, the first RF switch is connected to the first connection port of the first RF switch, and the second RF switch is connected to the third connection port of the second RF switch, that is, the first RF switch and the second RF switch are connected to the first receiving RF path.

[0037] In the embodiment of the present application, the signal strength of the RF signal is not less than the threshold value, indicating that the currently received RF signal is a strong signal. The first receiving RF path includes a receiving filter and a first low noise amplifier LNA. The receiving filter can ensure that in a strong signal scenario, out-of-band interference signals are effectively suppressed, ensuring that the LNA will not be blocked due to interference signals, thereby affecting the overall receiving performance.

[0038] When the signal strength of the RF signal is less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the second receiving RF path through the control line. It should be noted that the second RF switch includes a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path. When the signal strength of the RF signal is less than the threshold value, the first RF switch is connected to the second connection port, and the second RF switch is connected to the fourth connection port, so that the second receiving RF path is connected.

[0039] In an embodiment of the present application, the signal strength of the RF signal is less than the threshold value, which may indicate that the current scene is in a weak signal scene. In this case, the second receiving RF path is connected. Compared with the first receiving RF path, the second receiving RF path of the present application does not include a receiving filter, that is, the receiving path loss is reduced. When the signal strength of the current RF signal is less than the threshold value, the second receiving RF path is selected to transmit the RF signal, thereby avoiding path loss and improving the signal reception sensitivity in weak signal scenarios.

[0040] In an embodiment of the present application, a signal transceiver device for a wireless communication frequency band is provided, comprising an antenna, an RF transceiver, a processor, a first receiving RF path, a second receiving RF path, a first RF switch and a second RF switch; the first RF switch comprises a first connection port and a second connection port; the first RF switch is connected to the antenna, and is used to transmit the RF signal received by the antenna to the RF transceiver through the first connection port or the second connection port; the first connection port is connected to the first receiving RF path; the second connection port is connected to the second receiving RF path; the processor is connected to the RF transceiver, and is used to judge the RF signal based on a threshold value, and when the signal strength of the RF signal is not less than the threshold value, the first RF switch and the second RF switch are controlled by the processor to connect the first receiving RF path; when the signal strength of the RF signal is less than the threshold value, the first RF switch and the second RF switch are controlled by the processor to connect the second receiving RF path; the second RF switch comprises a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path. The signal transceiver device of the wireless communication frequency band of the present application selects the first receiving RF path or the second receiving RF path by switching the first RF switch and the second RF switch, which not only solves the problem of low noise amplifier blocking caused by strong out-of-band interference signals, but also solves the problem of increasing the receiving path loss and causing a decrease in receiving sensitivity by adding a receiving filter.

[0041] It should be noted that each implementation method of the present application can be freely combined, the order can be changed, or it can be executed separately, and does not need to rely on or depend on a fixed execution order.

[0042] In some embodiments, the first receiving RF path includes a receiving filter and a first low noise amplifier, the input end of the receiving filter is connected to the first connection port, the output end of the receiving filter is connected to the input end of the first low noise amplifier, and the output end of the first low noise amplifier is connected to the third connection port.

[0043] Specifically, the first receiving RF path of the present application includes a receiving filter and a first low-noise amplifier, the input end of the receiving filter is connected to the first connection port of the first RF switch, the output end of the receiving filter is connected to the input end of the first low-noise amplifier in the first receiving RF path, and the output end of the first low-noise amplifier in the first receiving RF path is connected to the third connection port in the second RF switch.

[0044] In the embodiment of the present application, after the processor determines that the signal strength of the RF signal received by the RF transceiver is not less than the threshold value, it indicates that the currently received RF signal is a strong signal, and the processor controls the first RF switch and the second RF switch through the control line, overlaps the corresponding connection ports, and connects the first receiving RF path. The first receiving RF path includes a receiving filter and a first low noise amplifier LNA. The receiving filter can ensure that in a strong signal scenario, out-of-band interference signals are effectively suppressed, and the first LNA will not be blocked due to interference signals, thereby affecting the overall receiving performance.

[0045] In some embodiments, the signal transceiver device further includes a control circuit;

[0046] The second receiving radio frequency path includes a second low noise amplifier; an input end of the second low noise amplifier is connected to the second connection port, and an output end of the second low noise amplifier is connected to the fourth connection port.

[0047] Specifically, compared with the first receiving RF path, the second receiving RF path of the present application does not include a receiving filter, but only includes a second low noise amplifier.

[0048] In a specific implementation, when the signal strength of the RF signal is less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the second receiving RF path through the control line. It should be noted that the input end of the second low noise amplifier is connected to the second connection port, the output end of the second low noise amplifier is connected to the fourth connection port, and the second RF switch includes a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path. When the signal strength of the RF signal is less than the threshold value, the first RF switch is connected to the second connection port, and the second RF switch is connected to the fourth connection port, so that the second receiving RF path is connected.

[0049] In an embodiment of the present application, the signal strength of the RF signal is less than the threshold value, which may indicate that the current scene is in a weak signal scene. In this case, the second receiving RF path is connected. Compared with the first receiving RF path, the second receiving RF path of the present application does not include a receiving filter, which reduces the receiving path loss.

[0050] In some embodiments, the radio frequency transceiver includes a frequency converter, and the processor includes an analog-to-digital converter and a digital signal processing chip, wherein:

[0051] The input end of the frequency converter is connected to the second RF switch, and the output end of the frequency converter is connected to the input end of the analog-to-digital converter, for performing frequency conversion processing on the RF signal to obtain a frequency conversion signal and sending the frequency conversion signal to the analog-to-digital converter;

[0052] The output end of the analog-to-digital converter is connected to the input end of the digital signal processing chip, and is used to perform analog-to-digital conversion on the frequency conversion signal to obtain a reference signal receiving power (RSRP) signal and send the RSRP signal to the digital signal processing chip;

[0053] The digital signal processing chip is used to judge the RSRP signal based on the threshold value, and determine that the radio frequency signal is a strong signal when the RSRP signal is not less than the threshold value;

[0054] Or, when the RSRP signal is less than the threshold value, it is determined that the radio frequency signal is a weak signal.

[0055] Specifically, in the specific implementation of the present application, the role of the RF transceiver is to complete the signal receiving and transmitting function. In the specific implementation, the RF transceiver includes a frequency converter, the input end of the frequency converter is connected to the second RF switch, and the output end of the frequency converter is connected to the input end of the analog-to-digital converter. After the RF signal sent by the antenna is received for the first time, the RF signal is sent to the frequency converter of the RF transceiver through the first receiving RF path, the RF signal is processed by the frequency converter to obtain a frequency conversion signal, and then the frequency conversion signal is sent to the processor.

[0056] In an embodiment of the present application, the processor includes an analog-to-digital converter and a digital signal processing chip. The analog-to-digital converter is used to perform analog-to-digital conversion on the received frequency conversion signal to obtain an RSRP signal, and then send the RSRP signal to the digital signal processing chip. The RSRP signal is judged based on the threshold value through level judgment. When the RSRP signal is not less than the threshold value, the RF signal is determined to be a strong signal; or, when the RSRP signal is less than the threshold value, the RF signal is determined to be a weak signal.

[0057] In an embodiment of the present application, a signal transceiver device for a wireless communication frequency band is provided, comprising an antenna, an RF transceiver, a processor, a first receiving RF path, a second receiving RF path, a first RF switch and a second RF switch; the first RF switch comprises a first connection port and a second connection port; the first RF switch is connected to the antenna, and is used to transmit the RF signal received by the antenna to the RF transceiver through the first connection port or the second connection port; the first connection port is connected to the first receiving RF path; the second connection port is connected to the second receiving RF path; the processor is connected to the RF transceiver, and is used to judge the RF signal based on a threshold value, and when the signal strength of the RF signal is not less than the threshold value, the first RF switch and the second RF switch are controlled by the processor to connect the first receiving RF path; when the signal strength of the RF signal is less than the threshold value, the first RF switch and the second RF switch are controlled by the processor to connect the second receiving RF path; the second RF switch comprises a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path. The signal transceiver device of the wireless communication frequency band of the present application selects the first receiving RF path or the second receiving RF path by switching the first RF switch and the second RF switch, which not only solves the problem of low noise amplifier blocking caused by strong out-of-band interference signals, but also solves the problem of increasing the loss of the receiving path and causing the decrease of receiving sensitivity due to the increase of receiving filters. It also effectively improves the receiving sensitivity under weak signals and improves the receiving performance of the terminal.

[0058] In some embodiments, the first radio frequency switch further includes a fifth connection port, and the signal transceiver device includes a transmission path;

[0059] The input end of the transmission path is connected to the radio frequency transceiver, and the output end of the transmission path is connected to the fifth connection port.

[0060] Specifically, the first RF switch is a three-throw switch, and therefore, further includes a fifth connection port 4, such as Figure 1 As shown, the first RF switch 160 includes a fifth connection port 4. After confirming whether the currently received RF signal corresponds to a strong signal scenario or a weak signal scenario, confirming whether the corresponding receiving path is the first receiving RF path or the second receiving RF path, and then connecting the transmitting path. The fifth connection port 4 of the first RF switch is connected to the output end of the transmitting path, and the input end of the transmitting path is connected to the RF transceiver.

[0061] In some embodiments, the transmit path includes a transmit power amplifier and a transmit filter connected in sequence;

[0062] The input end of the transmission power amplifier is connected to the radio frequency transceiver, the output end of the transmission power amplifier is connected to the input end of the transmission filter, and the output end of the transmission filter is connected to the antenna through the fifth connection port.

[0063] Specifically, the transmission path of the embodiment of the present application includes a transmission power amplifier and a transmission filter.

[0064] In some embodiments, the radio frequency signal is a time division duplex (TDD) frequency band radio frequency signal.

[0065] Specifically, the radio frequency signal in the embodiment of the present application may be a time division duplexing (TDD) frequency band radio frequency signal.

[0066] TDD frequency band radio frequency signal, namely time division duplex signal, is a duplex technology used in mobile communication technology. In TDD mode, the transmission and reception of signals are carried out in different time slots of the same frequency channel, which can save spectrum resources and improve communication efficiency.

[0067] In some embodiments, an input terminal of the first low noise amplifier is provided with an impedance matching an output terminal of the receiving filter.

[0068] In some embodiments, the input end of the transmit power amplifier is provided with an impedance matching the second connection port.

[0069] In a second aspect, the present application provides a mobile terminal, in which a printed circuit board PCB is arranged, and a signal transceiver device of a wireless communication frequency band as described in any one of the above items is arranged on the PCB.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A signal transceiver device for a wireless communication frequency band, characterized in that: include: An antenna, a radio frequency transceiver, a processor, a first receiving radio frequency path, a second receiving radio frequency path, a first radio frequency switch, and a second radio frequency switch, wherein: The first RF switch includes a first connection port and a second connection port; the first RF switch is connected to the antenna, and is used to transmit the RF signal received by the antenna to the RF transceiver through the first connection port or the second connection port; the first connection port is connected to the first receiving RF path; the second connection port is connected to the second receiving RF path; The processor is connected to the RF transceiver, and is used to judge the RF signal based on a threshold value. When the signal strength of the RF signal is not less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the first receiving RF path; when the signal strength of the RF signal is less than the threshold value, the processor controls the first RF switch and the second RF switch to connect the second receiving RF path; the second RF switch includes a third connection port and a fourth connection port; the third connection port is connected to the first receiving RF path, and the fourth connection port is connected to the second receiving RF path.

2. The signal transceiver device of the wireless communication frequency band according to claim 1, characterized in that: The first receiving RF path includes a receiving filter and a first low noise amplifier, the input end of the receiving filter is connected to the first connection port, the output end of the receiving filter is connected to the input end of the first low noise amplifier, and the output end of the first low noise amplifier is connected to the third connection port.

3. The signal transceiver device of the wireless communication frequency band according to claim 1, characterized in that: The signal transceiver device also includes a control circuit; The second receiving radio frequency path includes a second low noise amplifier; an input end of the second low noise amplifier is connected to the second connection port, and an output end of the second low noise amplifier is connected to the fourth connection port.

4. The signal transceiver device of the wireless communication frequency band according to claim 1, characterized in that: The radio frequency transceiver includes a frequency converter, and the processor includes an analog-to-digital converter and a digital signal processing chip, wherein: The input end of the frequency converter is connected to the second RF switch, and the output end of the frequency converter is connected to the input end of the analog-to-digital converter, for performing frequency conversion processing on the RF signal to obtain a frequency conversion signal and sending the frequency conversion signal to the analog-to-digital converter; The output end of the analog-to-digital converter is connected to the input end of the digital signal processing chip, and is used to perform analog-to-digital conversion on the frequency conversion signal to obtain a reference signal received power RSRP signal and send the RSRP signal to the digital signal processing chip; The digital signal processing chip is used to judge the RSRP signal based on the threshold value, and determine that the radio frequency signal is a strong signal when the RSRP signal is not less than the threshold value; Or, when the RSRP signal is less than the threshold value, it is determined that the radio frequency signal is a weak signal.

5. The signal transceiver device of the wireless communication frequency band according to claim 1, characterized in that: The first radio frequency switch further includes a fifth connection port, and the signal transceiver device includes a transmission path; The input end of the transmission path is connected to the radio frequency transceiver, and the output end of the transmission path is connected to the fifth connection port.

6. The signal transceiver device of the wireless communication frequency band according to claim 5, characterized in that: The transmission path includes a transmission power amplifier and a transmission filter connected in sequence; The input end of the transmission power amplifier is connected to the radio frequency transceiver, the output end of the transmission power amplifier is connected to the input end of the transmission filter, and the output end of the transmission filter is connected to the antenna through the fifth connection port.

7. The signal transceiver device of the wireless communication frequency band according to claim 1, characterized in that: The radio frequency signal is a time division duplex TDD frequency band radio frequency signal.

8. The signal transceiver device of the wireless communication frequency band according to claim 2, characterized in that: The input end of the first low noise amplifier is provided with an impedance matching the output end of the receiving filter.

9. The signal transceiver device of the wireless communication frequency band according to claim 6, characterized in that: The input end of the transmission power amplifier is provided with an impedance matching the second connection port.

10. A mobile terminal, in which a printed circuit board (PCB) is arranged, characterized in that: The PCB board is provided with a signal transceiver device of the wireless communication frequency band as described in any one of claims 1-9.

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