Short message communication module and communication terminal integrated with integrated service digital network switching function

Abstract

The utility model provides a short message communication module integrating an integrated service digital network switching function and a communication terminal. The module comprises a baseband circuit, a radio frequency device, a receiving radio frequency front-end circuit, a transmitting radio frequency front-end circuit, a GNSS radio frequency circuit and an integrated service digital network radio frequency circuit, the baseband circuit is connected with the radio frequency device and the GNSS radio frequency circuit, the radio frequency device is connected with the receiving radio frequency front-end circuit and the transmitting radio frequency front-end circuit, and the integrated services digital network radio frequency circuit is connected with the GNSS radio frequency circuit, the receiving radio frequency front-end circuit and the transmitting radio frequency front-end circuit; the receiving radio frequency front-end circuit is used for receiving an S signal of the RDSS; the transmitting radio frequency front-end circuit is used for transmitting an L signal of the RDSS; the GNSS radio frequency circuit is used for receiving a GNSS signal; and the integrated services digital network radio frequency circuit is used for combining the S signal, the L signal and the GNSS signal into one signal for input and output. A passive antenna and an integrated services digital network antenna can be supported at the same time, all-in-one machine and split machine terminal design is supported, the integration degree is high, and the size specification is small.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of satellite communication, and particularly relates to a short message communication module with one-wire-through switching function and a communication terminal. BACKGROUND

[0002] With the promotion of the construction of Beidou-3 system by the country, many types of Beidou short message communication modules have emerged in the market, and the main functions include single transmission module, transceiver compatible module and one-wire-through module. The single transmission module can only transmit short messages and cannot receive short messages, is composed of a single transmission channel, has low technical difficulty and does not need to solve the problem of electromagnetic compatibility (EMC) of transmission and reception. The transceiver compatible module is composed of a transmission and reception channel, the transmission and reception channel is independently input and output, and generally integrates a receiving low noise amplifier (LNA) and a transmitting power amplifier. Although the transceiver compatible module can be compatible with the functions of transmission and reception, it also has differences between built-in power amplifiers and external power amplifiers, and is not conducive to unified specifications due to various forms. The principle of the one-wire-through module is to combine the transmission and reception channels into one interface and provide antenna feed, so that the one-wire-through module can also be compatible with the functions of transmission and reception, but the application scene is suitable for split devices, that is, the antenna and the host are separated, the antenna integrates the power amplifier and the receiving amplifier, and the one-wire-through module is used to connect the host to realize the transmission of radio frequency signals and electrical signals at the same time. The current products have differences in forms, such as surface mounted devices (SMD) stamp hole packaging and metal cavity structure specifications, and the two are also the most popular application forms at present.

[0003] The advantages and disadvantages, functions and forms of the above-mentioned short message communication modules are different. The single transmission module has small size and single function, and can only transmit but not receive. The transceiver compatible module cannot meet the application requirements of split devices. The one-wire-through module can only meet the design requirements of split devices, and the amplifiers and power amplifiers are in the antenna, so that the built-in amplifiers and power amplifiers cannot be integrated. Under the requirements of higher integration and more diversified product forms of Beidou short message communication applications, the functions and sizes of Beidou short message modules are required to be more demanding, the functions are required to be more comprehensive, and the size specifications are required to be smaller. The existing short message communication modules cannot meet the requirements. Practical new type content

[0004] The main purpose of the embodiment of the utility model is to provide a short message communication module with one-wire-through switching function and a communication terminal, which can support passive antennas and one-wire-through antennas at the same time, support integrated machine and split machine terminal design, have high integration and small size specifications.

[0005] In a first aspect, a short message communication module with one-line-through switching function is provided, comprising a baseband circuit, a radio frequency device, a receiving radio frequency front-end circuit, a transmitting radio frequency front-end circuit, a GNSS radio frequency circuit and a one-line-through radio frequency circuit; the baseband circuit is connected with the radio frequency device and the GNSS radio frequency circuit; the radio frequency device is connected with the receiving radio frequency front-end circuit and the transmitting radio frequency front-end circuit; the one-line-through radio frequency circuit is connected with the receiving radio frequency front-end circuit, the transmitting radio frequency front-end circuit and the GNSS radio frequency circuit; the receiving radio frequency front-end circuit is used for receiving an S signal of an RDSS and transmitting the S signal to the radio frequency device; the transmitting radio frequency front-end circuit is used for transmitting an L signal of the RDSS output by the radio frequency device; the GNSS radio frequency circuit is used for receiving a GNSS signal and transmitting the GNSS signal to the baseband circuit or outputting the short message communication module; the one-line-through radio frequency circuit is used for dividing a received signal into the S signal and a GNSS signal and outputting an L signal; the radio frequency device and the GNSS radio frequency circuit output an intermediate frequency signal to the baseband circuit for signal analysis.

[0006] In another possible implementation, the one-line-through radio frequency circuit comprises a first anti-burnout protector, a first power divider and a second power divider connected in sequence; the first power divider is further connected with the transmitting radio frequency front-end circuit; the second power divider is connected with the receiving radio frequency front-end circuit and the GNSS radio frequency circuit; and the first anti-burnout protector is further connected with an external one-line-through antenna.

[0007] In another possible implementation, the receiving radio frequency front-end circuit comprises a second anti-burnout protector, a first filter, a first low-noise amplifier, a first radio frequency switch, a second filter, a second low-noise amplifier and a third filter connected in sequence; the third filter is further connected with the radio frequency device; the first radio frequency switch is further connected with the second power divider in the one-line-through radio frequency circuit; and the second anti-burnout protector is further connected with an external S antenna.

[0008] In another possible implementation, the transmitting radio frequency front-end circuit comprises a second radio frequency switch, an attenuator, a fourth filter, a first power amplifier, a second power amplifier and a fifth filter connected in sequence; the second radio frequency switch is further connected with the radio frequency device and the first power divider in the one-line-through radio frequency circuit; and the fifth filter is further connected with an external L antenna.

[0009] In another possible implementation, the GNSS radio frequency circuit comprises a third anti-burnout protector, a third low-noise amplifier, a third radio frequency switch and a GNSS circuit connected in sequence; the third radio frequency switch is further connected with the second power divider in the one-line-through radio frequency circuit; the GNSS circuit is further connected with the baseband circuit; and the third anti-burnout protector is further connected with an external GNSS antenna.

[0010] In another possible implementation, the short message communication module further comprises: an interface circuit; the interface circuit comprises: a first power input interface for inputting a receiving channel power supply; a second power input interface for inputting a power amplifier power supply, the second power input interface being connected with a transmitting radio frequency front-end circuit and a one-wire-passing radio frequency circuit; a plurality of UART interfaces for transmitting data; a one-wire-passing switching interface for inputting a one-wire-passing switching signal; a plurality of SIM card interfaces for connecting external Beidou SIM chips; a reset interface for receiving a reset control signal; and a plurality of antenna interfaces for connecting a plurality of antennas respectively.

[0011] In another possible implementation, the short message communication module further comprises: a power circuit connected with the first power input interface, the power circuit comprising a first power conversion module, a second power conversion module, a third power conversion module, a fourth power conversion module, a fifth power conversion module, a sixth power conversion module and a seventh power conversion module; the first power conversion module, the second power conversion module and the third power conversion module being connected with the baseband circuit; the fourth power conversion module being connected with the receiving radio frequency front-end circuit; the fifth power conversion module being connected with the transmitting radio frequency front-end circuit; the sixth power conversion module being connected with the radio frequency device; and the seventh power conversion module being connected with the oscillator.

[0012] In another possible implementation, the radio frequency device integrates a low-noise amplifier, a mixer, an intermediate frequency filter, an automatic gain control loop and a 4-bit analog-to-digital converter.

[0013] In another possible implementation, the short message communication module has a width of 30 mm, a length of 35 mm and a height of 3.5 mm.

[0014] In a second aspect, a communication terminal is provided, comprising a Beidou SIM chip and the aforementioned short message communication module with one-wire-passing switching function connected with the Beidou SIM chip. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced.

[0016] Figure 1 A structural schematic diagram of the short message communication module with one-wire-passing switching function provided for an embodiment of the present application is shown in the figure.

[0017] Figure 2 A power circuit schematic diagram in the short message communication module with one-wire-passing switching function provided for an embodiment of the present application is shown in the figure.

[0018] Figure 3 A packaging structure schematic diagram of the short message communication module with one-wire-passing switching function provided for an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0019] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like component have the same or similar designations. The embodiments described below are presented by way of example only and are not intended to limit the present application as there are many applications of the principles of the present application.

[0020] As will be understood by those skilled in the art, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be further understood that the terms "comprise," "comprises," "comprising," "include," "includes," and / or "including" when used in this specification, specify the presence of stated features, integers, steps, operations, modules, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, modules, components, and / or groups thereof. As will be understood by those skilled in the art, when we say that a module is "connected" or "coupled" to another module, it can be directly connected or coupled to the other module, or there can be intervening modules. Also, as used herein, "connected" or "coupled" can include wirelessly connected or wirelessly coupled. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0021] In order to make the purposes, technical solutions and advantages of the present application clearer, the following will further describe the implementation manners of the present application in detail.

[0022] The technical solutions of the present application and the solutions to the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0023] Figure 1 As shown in the drawing, the structure diagram of the short message communication module with one-line-through switching function is provided in one embodiment of the present application. As shown in the drawing, Figure 1 As shown in the drawing, the short message communication module with one-line-through switching function comprises a baseband circuit, a radio frequency device, a receiving radio frequency front-end circuit, a transmitting radio frequency front-end circuit, a GNSS radio frequency circuit and a one-line-through radio frequency circuit; the baseband circuit is connected with the radio frequency device and the GNSS radio frequency circuit, the radio frequency device is connected with the receiving radio frequency front-end circuit and the transmitting radio frequency front-end circuit, and the one-line-through radio frequency circuit is connected with the receiving radio frequency front-end circuit, the transmitting radio frequency front-end circuit and the GNSS radio frequency circuit.

[0024] The receiving radio frequency front-end circuit is used for receiving S signals of the RDSS and transmitting to the radio frequency device; the transmitting radio frequency front-end circuit is used for transmitting L signals of the RDSS output by the radio frequency device; the GNSS radio frequency circuit is used for receiving GNSS signals and transmitting to the baseband circuit or outputting a short message communication module; the one-wire-through radio frequency circuit is used for inputting S signals and GNSS signals of received signals and outputting L signals; the radio frequency device and the GNSS radio frequency circuit output intermediate frequency signals to the baseband circuit for signal analysis. The S signals of the RDSS are Beidou short message S signals with a frequency of 2491.75 MHz, and the L signals of the RDSS are Beidou short message L signals with a frequency of 1610-1625 MHz.

[0025] The short message communication module with the one-wire-through switching function of the utility model has the transmitting and receiving functions of Beidou No.3 communication, the built-in LNA amplifier and power amplifier, and can realize short message communication application in one-wire-through mode, input and output S signals, L signals and GNSS signals through the one-wire-through radio frequency circuit, well integrate the functions of the current module, effectively solve different user requirements with one module, and realize various application modes of a single product for users.

[0026] In the embodiment of the utility model, the one-wire-through radio frequency circuit includes: first burnout protection device F1, first power divider G1 and second power divider G2 connected in sequence; the first power divider G1 is further connected with the transmitting radio frequency front-end circuit, the second power divider G2 is connected with the receiving radio frequency front-end circuit and the GNSS radio frequency circuit, and the first burnout protection device F1 is further connected with the one-wire-through antenna outside. The one-wire-through radio frequency circuit is used for connecting the one-wire-through antenna, realizing the input and output of the short message S signals and GNSS signals of Beidou and the output of the short message L signals of Beidou, and providing the feed of the one-wire-through antenna. The signal received by the one-wire-through radio frequency circuit reaches the first power divider G1 after the first burnout protection device F1, the first power divider G1 is used for input and output of the short message L signals of Beidou and the received signals, and the second power divider G2 is used for dividing the short message S signals and GNSS signals of Beidou received by the one-wire-through antenna.

[0027] The receiving radio frequency front-end circuit comprises a second anti-burnout protector F2, a first filter L1, a first low-noise amplifier LNA1, a first radio frequency switch K1, a second filter L2, a second low-noise amplifier LNA2 and a third filter L3 connected in sequence; the third filter L3 is further connected with a radio frequency device; the first radio frequency switch K1 is further connected with a second power divider G2 in a one-way-through radio frequency circuit; and the second anti-burnout protector F2 is further connected with an external S antenna. The receiving radio frequency front-end circuit is used for receiving S signals of a frequency point of 2491.75 MHz of the Beidou-3 RDSS and performing filtering and amplification on the signals. The signals received by the S antenna are inputted, protected by the second anti-burnout protector F2, firstly passed through the first filter L1, filtered by the first filter L1 to remove out-of-band signals, and then reach the first low-noise amplifier LNA1 to amplify the S signals of 2491.75 MHz, and the amplification factor of this stage is about 18 dB. After the signals are amplified by the first low-noise amplifier LNA1, the signals are further passed through the second filter L2 to further remove out-of-band interference signals. The signals then reach the second low-noise amplifier LNA2, the amplification factor of the second low-noise amplifier LNA2 is about 22 dB, and after amplification, the signals reach the third filter L3, and finally enter the radio frequency device to complete the filtering and amplification of the radio frequency front-end signals.

[0028] The transmitting radio frequency front-end circuit comprises a second radio frequency switch K2, an attenuator, a fourth filter L4, a first power amplifier A1, a second power amplifier A2 and a fifth filter L5 connected in sequence; the second radio frequency switch K2 is further connected with a radio frequency device and a first power divider G1 in a one-way-through radio frequency circuit; and the fifth filter L5 is further connected with an external L antenna. The second power amplifier A2 is preferably a power amplifier (PA), and the first power amplifier A1 is preferably a PA push amplifier. The transmitting radio frequency front-end circuit is used for transmitting L signals outputted by the radio frequency device, and the design of the transmitting radio frequency front-end circuit is to ensure the stability and sufficiency of the transmitting power. The L signals are outputted from the radio frequency device at an amplitude of about 0 dBm, enter the PA push amplifier after passing through the second radio frequency switch K2 and the 5 dB attenuator, and at this time, the signal strength is about -5 dBm, the gain of the PA push amplifier is 31 dB, and after the -5 dBm signal is amplified, the signal is about 26 dBm. The output of the PA push amplifier reaches the power amplifier, is amplified to about 37 dBm by the second power amplifier A2, and finally passes through the fifth filter L5 to filter out out-of-band interference.

[0029] The GNSS radio frequency circuit comprises: a third anti-fuse protector F3, a third low noise amplifier LNA3, a third radio frequency switch K3 and a GNSS circuit connected in sequence; the third radio frequency switch K3 is also connected with a second power divider G2 in the one-line-through radio frequency circuit; the GNSS circuit is also connected with the baseband circuit; the third anti-fuse protector F3 is also connected with an external GNSS antenna.

[0030] The baseband circuit is used for realizing down-conversion processing of a received signal and up-conversion processing of a transmitted signal, and simultaneously outputting a reference clock required by the baseband chip. The RF processor integrates a low noise amplifier (LNA), a mixer (MXR), an intermediate frequency filter (FILTER), an automatic gain control loop (AGC) and a 4-bit analog-to-digital converter (ADC).

[0031] The short message communication module further comprises an interface circuit.

[0032] In the embodiment of the utility model, referring to Figure 1 and Figure 2, the short message communication module further comprises a power supply circuit connected with the first power supply input interface, and the power supply circuit comprises a first power conversion module, a second power conversion module, a third power conversion module, a fourth power conversion module, a fifth power conversion module, a sixth power conversion module and a seventh power conversion module; the first power conversion module, the second power conversion module and the third power conversion module are connected with the baseband circuit; the fourth power conversion module is connected with the receiving radio frequency front-end circuit; the fifth power conversion module is connected with the transmitting radio frequency front-end circuit; the sixth power conversion module is connected with the radio frequency device; and the seventh power conversion module is connected with the oscillator. The power supply circuit mainly provides power supply for the receiving path (including the receiving radio frequency front-end circuit, the transmitting radio frequency front-end circuit, the baseband circuit and the radio frequency device) in the short message communication module with the one-wire-through switching function. The utility model embodiment further inputs the power amplifier power supply PA_VCC through the second power supply input interface, and directly provides power supply for the second power amplifier in the transmitting radio frequency front-end circuit. When the short message communication module with the one-wire-through switching function is switched to the one-wire-through mode, the power amplifier power supply PA_VCC also provides power supply for the one-wire-through radio frequency circuit, and outputs to the one-wire-through antenna.

[0033] The short message communication module with the one-wire-through switching function in the utility model embodiment adopts a stamp hole SMD package, with a width of 30 mm, a length of 35 mm and a height of 3.5 mm. The specific packaging structure is shown in Figure 3 , and comprises 42 pins, and the functions of the pins are defined as follows.

[0034] Pin 1 is defined as GND, and functions as grounding.

[0035] Pin 2 is defined as RXD0, and functions as an RDSS data communication port, responsible for data transmission, with an LVTTL level standard.

[0036] Pin 3 is defined as TXD0, and functions as an RDSS data communication port, data reception, with an LVTTL level standard.

[0037] Pin 4 is defined as GND, and functions as grounding.

[0038] Pin 5 is defined as IC_3V3, and functions as a Beidou card power supply output.

[0039] Pin 6 is defined as IC_SD, and functions as a Beidou card data signal output.

[0040] Pin 7 is defined as IC_SCLK, and functions as a Beidou card data signal output.

[0041] Pin 8 is defined as IC_SRSTN, and functions as a Beidou card reset signal output.

[0042] Pin 9, pin 10, pin 11 and pin 12 are defined as GND, and function as grounding.

[0043] Pin 13, pin 14 are defined as PA_5V, and the function is to provide power supply for Beidou card output;

[0044] Pin 15, pin 16, pin 17, pin 18 are defined as GND, and the function is to ground;

[0045] Pin 19 is defined as L_RFOUT, and the function is to output radio frequency transmission signal;

[0046] Pin 20, pin 21, pin 22, pin 23 are defined as GND, and the function is to ground;

[0047] Pin 24 is defined as VCC_IN_EN, and the function is to receive power input enable of module;

[0048] Pin 25 is defined as GND, and the function is to ground;

[0049] Pin 26 is defined as VCC_IN, and the function is to receive power input of module;

[0050] Pin 27 is defined as NRESET, and the function is to reset input of module;

[0051] Pin 28 is defined as TXD1, and the function is RNSS data communication port, data receiving, LVTTL level;

[0052] Pin 29 is defined as RXD1, and the function is RNSS data communication port, data sending, LVTTL level;

[0053] Pin 30 is defined as 1PPS, and the function is to output second pulse data;

[0054] Pin 31 is defined as reserved function pin;

[0055] Pin 32 is defined as GND, and the function is to ground;

[0056] Pin 33 is defined as RN_RFIN, and the function is RNSS radio frequency signal input;

[0057] Pin 34 is defined as GND, and the function is to ground;

[0058] Pin 35 is defined as S_RFIN, and the function is RDSS radio frequency signal input;

[0059] Pin 36 is defined as GND, and the function is to ground;

[0060] Pin 37 is defined as GND, and the function is to ground;

[0061] Pin 38 is defined as ALL_RF, and the function is one line through antenna radio frequency signal port;

[0062] Pin 39 is defined as GND, and functions as ground;

[0063] Pin 40 is defined as TX_FLA, and functions as a line-through transmission enable output;

[0064] Pin 41 is defined as ALL_EN, and functions as a line-through mode enable;

[0065] Pin 42 is defined as NC, and functions as empty.

[0066] In the embodiment of the utility model, the line-through function is mainly composed of two power dividers G1, G2 and three radio frequency switches, the input and output paths of the radio frequency switch selection signal are controlled by the antenna switching control signal at the same time, the signal reaches the first power divider G1 after the first anti-burnout protector F1, and is used for the input and output of the combined Beidou short message L signal and the received signal, the second power divider G2 is used for the distribution of the Beidou short message S signal and the GNSS signal received by the line-through antenna.

[0067] The short message communication module with line-through switching function in the embodiment of the utility model is composed of four antenna interfaces, and is used for realizing RDSS function, GNSS function and line-through function respectively.The RDSS part transmits the received Beidou signal to the radio frequency device for down-conversion processing through the front-end radio frequency receiving circuit, finally reaches the baseband circuit for signal analysis, and also in the baseband chip circuit, the information needing to be sent is processed through the up-conversion of the radio frequency device, reaches the power amplifier and is transmitted to the satellite to complete a communication process.The GNSS part signal is input from the antenna interface, is selected into the GNSS radio frequency circuit through a low-noise amplifier, and is finally output through the module.The short message communication module with line-through switching function communicates with the outside through two groups of UART serial ports.RDSS and GNSS have a radio frequency switch to select independent antenna input signal or input from the line-through antenna, the line-through antenna combines S, L, B1 / L signals, and provides maximum 32V voltage output to the outside.

[0068] The short message communication module with one-line-through switching function provided by the embodiment of the utility model has all the functions of the existing module, adopts a postage hole SMD package which is small in size and convenient to use, has the functions of transmitting and receiving of Beidou-3 communication, has a built-in LNA amplifier and power amplifier, can realize short message communication application in one-line-through mode, and well integrates the functions of the current module and adopts the packaging specification of the current mainstream module, so that one module can effectively solve the different user requirements and realize various application modes of a single product. The short message communication module can realize regional and global communication capability of Beidou, is compatible with Beidou-2 system, solves the compatibility problem of using Beidou system, and can realize communication positioning function of Beidou-2 and Beidou-3 systems. The short message communication module with one-line-through switching function provided by the embodiment of the utility model has a built-in LNA amplifier and power amplifier, supports passive antenna, can be connected with one-line-through antenna when switching one-line-through mode, supports integrated and split terminal design, has high integration, and is small in size; has GNSS and Beidou short message fusion processing, the position of GNSS can be sent through RDSS short message communication technology and does not depend on public network; can realize regional and global short message communication function, also has the function of connecting GNSS positioning module and realizing signal combination; is compatible with Beidou-2 system short message communication; the size is 30mm in width, 35mm in length and 3.5mm in height, and the module adopts a postage hole SMD package, so that compared with the one-line-through module using a metal cavity, the size is smaller and the application is more convenient.

[0069] In conclusion, the short message communication module with one-line-through switching function comprises a baseband circuit, a radio frequency device, a receiving radio frequency front-end circuit, a transmitting radio frequency front-end circuit, a GNSS radio frequency circuit and a one-line-through radio frequency circuit; the baseband circuit is connected with the radio frequency device and the GNSS radio frequency circuit, the radio frequency device is connected with the receiving radio frequency front-end circuit and the transmitting radio frequency front-end circuit, and the one-line-through radio frequency circuit is connected with the receiving radio frequency front-end circuit, the transmitting radio frequency front-end circuit and the GNSS radio frequency circuit; the receiving radio frequency front-end circuit is used for receiving S signal of RDSS and transmitting to the radio frequency device; the transmitting radio frequency front-end circuit is used for transmitting L signal of RDSS output by the radio frequency device; the GNSS radio frequency circuit is used for receiving GNSS signal and transmitting to the baseband circuit or outputting the short message communication module; the one-line-through radio frequency circuit is used for dividing the received signal into S signal and GNSS signal and outputting L signal; the radio frequency device and the GNSS radio frequency circuit output intermediate frequency differential signal to the baseband circuit for signal analysis, can support passive antenna and one-line-through antenna, support integrated and split terminal design, have high integration and small size specification.

[0070] The embodiment of the utility model also provides a communication terminal which comprises a Beidou SIM chip and the aforementioned short message communication module with one-line-through switching function connected with the Beidou SIM chip.

[0071] The above is only part of the implementation of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered within the scope of the present application.

Claims

1. A short message communication module integrated with a one-line pass switching function, characterized in that, The short message communication module comprises a baseband circuit, a radio frequency device, a receiving radio frequency front-end circuit, a transmitting radio frequency front-end circuit, a GNSS radio frequency circuit and a one-wire-through radio frequency circuit; the baseband circuit is connected with the radio frequency device and the GNSS radio frequency circuit, the radio frequency device is connected with the receiving radio frequency front-end circuit and the transmitting radio frequency front-end circuit, and the one-wire-through radio frequency circuit is connected with the receiving radio frequency front-end circuit, the transmitting radio frequency front-end circuit and the GNSS radio frequency circuit; The receiving radio frequency front-end circuit is used for receiving an S signal of RDSS and transmitting to the radio frequency device; the transmitting radio frequency front-end circuit is used for transmitting an L signal of RDSS output by the radio frequency device; the GNSS radio frequency circuit is used for receiving a GNSS signal and transmitting to the baseband circuit or outputting the short message communication module; the one-wire-through radio frequency circuit is used for inputting the received signal into the S signal and the GNSS signal and outputting the L signal; and the radio frequency device and the GNSS radio frequency circuit output an intermediate frequency signal to the baseband circuit for signal analysis.

2. The short message communication module of claim 1, wherein The one-wire-through radio frequency circuit comprises a first anti-burnout protector, a first power divider and a second power divider connected in sequence; the first power divider is further connected with the transmitting radio frequency front-end circuit, the second power divider is connected with the receiving radio frequency front-end circuit and the GNSS radio frequency circuit, and the first anti-burnout protector is further connected with an external one-wire-through antenna.

3. The short message communication module of claim 2, wherein, The receiving radio frequency front-end circuit comprises a second anti-burnout protector, a first filter, a first low-noise amplifier, a first radio frequency switch, a second filter, a second low-noise amplifier and a third filter connected in sequence; the third filter is further connected with the radio frequency device, the first radio frequency switch is further connected with the second power divider in the one-wire-through radio frequency circuit, and the second anti-burnout protector is further connected with an external S antenna.

4. The short message communication module of claim 2, wherein The transmitting radio frequency front-end circuit comprises a second radio frequency switch, an attenuator, a fourth filter, a first power amplifier, a second power amplifier and a fifth filter connected in sequence; the second radio frequency switch is further connected with the radio frequency device and the first power divider in the one-wire-through radio frequency circuit; and the fifth filter is further connected with an external L antenna.

5. The short message communication module of claim 2, wherein, The GNSS radio frequency circuit comprises a third anti-burnout protector, a third low-noise amplifier, a third radio frequency switch and a GNSS circuit connected in sequence; the third radio frequency switch is further connected with the second power divider in the one-wire-through radio frequency circuit; the GNSS circuit is further connected with the baseband circuit; and the third anti-burnout protector is further connected with an external GNSS antenna.

6. The short message communication module of claim 1, wherein The short message communication module further comprises an interface circuit; the interface circuit comprises: a first power input interface for inputting a receiving path power supply; a second power input interface for inputting a power amplifier power supply, the second power input interface being connected with the transmitting radio frequency front-end circuit and the one-wire-through radio frequency circuit; a plurality of UART interfaces for transmitting data; a one-wire-through switching interface for inputting a one-wire-through switching signal; A plurality of SIM card interfaces for connecting external Beidou SIM chips; A reset interface for receiving a reset control signal; And a plurality of antenna interfaces for connecting a plurality of antennas respectively.

7. The short message communication module of claim 6, wherein the short message communication module is configured to receive the short message from the short message service center via the short message service message gateway. The short message communication module further comprises a power supply circuit connected with the first power input interface, the power supply circuit comprising a first power conversion module, a second power conversion module, a third power conversion module, a fourth power conversion module, a fifth power conversion module, a sixth power conversion module and a seventh power conversion module; the first power conversion module, the second power conversion module and the third power conversion module are connected with the baseband circuit; the fourth power conversion module is connected with the receiving radio frequency front-end circuit; the fifth power conversion module is connected with the transmitting radio frequency front-end circuit; the sixth power conversion module is connected with the radio frequency device; and the seventh power conversion module is connected with the oscillator.

8. The short message communication module of claim 1, wherein The radio frequency device integrates a low noise amplifier, a mixer, an intermediate frequency filter, an automatic gain control loop and a 4-bit analog-to-digital converter.

9. The short message communication module of claim 1, wherein The short message communication module has a width of 30 mm, a length of 35 mm and a height of 3.5 mm.

10. A communication terminal, characterized by The communication terminal comprises a Beidou SIM chip and a short message communication module with one-wire-through switching function as claimed in any one of claims 1-9 connected with the Beidou SIM chip.

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