A radio frequency transceiver with dual modes of relay and mission

Abstract

The application discloses a radio frequency transceiver with dual modes of relay and task, and belongs to the technical field of radio frequency communication equipment. The transceiver comprises a diplexer, a circulator, a receiving assembly, a transmitting assembly, a switch, a frequency converter and a mode switching controller, and realizes accurate switching of the dual modes through the mode switching controller. In the task mode, signals are received / transmitted through the first switch, the second diplexer, the circulator and the third receiving / transmitting assembly; in the relay mode, task signals are transmitted through the first switch, the first diplexer and the first receiving / transmitting assembly, and relay signals are transmitted through the first switch, the second diplexer, the second receiving / transmitting assembly and an independent frequency converter. The application realizes the function of integrating the dual modes in a single device, solves the problems of existing devices such as crosstalk, poor frequency band adaptation and slow switching, reduces the volume and power consumption of the radio frequency transceiver device, improves the stability of signal transmission and the communication quality, and is suitable for complex communication scenarios.

Description

Technical Field

[0001] This invention relates to the field of radio frequency communication equipment technology, specifically to a radio frequency transceiver that combines relay and task modes, suitable for scenarios requiring flexible switching between direct communication and relay forwarding communication. Background Technology

[0002] As the core hardware of a wireless communication system, the radio frequency transceiver undertakes key functions such as receiving, frequency conversion, amplification, and transmission of radio frequency signals. The flexibility of its operating mode, the stability of signal transmission, and the performance of its components directly determine the overall communication quality and applicability of the communication system. In modern communication scenarios, with the diversification of networking requirements, single-mode radio frequency transceivers (direct connection only or relay only) can no longer meet dynamic communication needs. If two communication functions need to be implemented simultaneously, traditional solutions typically use two independent transceivers in combination. This not only increases equipment size and cost but also presents problems such as complex multi-device collaborative control, high risk of signal interference, and inconvenient installation and maintenance.

[0003] To address the aforementioned issues, some existing technologies have attempted to develop integrated dual-mode RF transceivers, but several technical shortcomings remain: First, the selection of switches and the design of linkage logic are often unreasonable, with many employing single-type switches or non-linkage control, leading to signal path corruption during mode switching and long switching response times, typically exceeding 10ms, which fails to meet real-time communication requirements. Second, the duplexer isolation is low, generally below 60dB, easily causing crosstalk between transmitted and received signals and reducing communication reliability. Third, the high noise figure of the receiving component, insufficient output power of the transmitting component, and narrow dynamic range of the frequency converter result in short signal transmission distances and weak anti-interference capabilities. Fourth, the poor matching between the circulator's operating frequency band and the duplexer's port frequency band further exacerbates signal loss and crosstalk problems. Fifth, the lack of a unified control core for mode switching leads to asynchronous operation of various switches, easily resulting in signal interruption or disorder during switching.

[0004] To address the technical problems of existing dual-mode RF transceivers, such as unclear switching linkage logic, low signal isolation, poor component performance adaptability, and slow mode switching response, there is an urgent need to design a dual-mode RF transceiver with a reasonable structure, precise switching linkage, excellent component performance, and efficient mode switching. This transceiver should not only achieve dual-mode functionality in a single device but also improve signal transmission stability and communication quality to meet the needs of diverse communication scenarios. Summary of the Invention

[0005] This invention provides a radio frequency transceiver with both relay and mission modes. The core objective of this invention is to achieve rapid and stable switching between mission and relay modes by optimizing switch selection and linkage logic design, and by using a high-isolation duplexer, low-noise receiving components, high-power transmitting components, and a wide dynamic range inverter, while simultaneously improving the anti-interference capability and stability of signal transmission.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A radio frequency transceiver with both relay and mission modes includes a switch, a duplexer, a circulator, a transmitting component, a receiving component, an upconverter, and a downconverter. The first port of the first switch is connected to the task radio frequency signal, the second port is connected to the relay radio frequency signal, the third port is connected to the common port of the first duplexer, and the fourth port is connected to the common port of the second duplexer. The high-frequency port of the first duplexer is connected to the input terminal of the first receiving component, and the low-frequency port is connected to the output terminal of the first transmitting component; the high-frequency port of the second duplexer is connected to the common port of the first circulator, and the low-frequency port is connected to the common port of the second circulator. The first port of the first circulator is connected to the output of the third transmitting component, and the second port is connected to the input of the second receiving component; the first port of the second circulator is connected to the output of the second transmitting component, and the second port of the second circulator is connected to the input of the third receiving component. The output of the first receiving component is connected to the first port of the third switch, the output of the second receiving component is connected to the second port of the third switch, and the output of the third receiving component is connected to the input of the second down-converter. The input terminal of the first transmitting component is connected to the third port of the fourth switch, the input terminal of the second transmitting component is connected to the first port of the second switch, and the input terminal of the third transmitting component is connected to the second port of the second switch. The output of the first up-converter is connected to the first port of the fourth switch, and the output of the second up-converter is connected to the second port of the fourth switch; the input of the first down-converter is connected to the common port of the third switch, and the output of the second down-converter is used to connect to the relay signal processor. The common port of the second switch is connected to the fourth port of the fourth switch; the common port of the third switch is connected to the input terminal of the first downconverter; and the fourth port of the fourth switch is connected to the common port of the second switch.

[0007] Furthermore, in task mode: The task radio frequency received signal is input through the first port of the first switch, output through its fourth port to the common port of the second duplexer, output through the high frequency port of the second duplexer to the common port of the first circulator, and then sent to the second receiving component through the second port of the first circulator; the output signal of the second receiving component is sent to the first downconverter through the second port and the common port of the third switch, and finally output by the first downconverter to the task signal processor. The mission radio frequency transmission signal is output from the mission signal processor to the first upconverter, then sent to the common port of the second switch via the first and fourth ports of the fourth switch, and then sent to the second transmitting component via the first port of the second switch; the output signal of the second transmitting component is sent to the low-frequency port of the second duplexer via the first port and the common port of the second circulator, then sent back to the fourth port of the first switch via the common port of the second duplexer, and finally transmitted from the first port of the first switch.

[0008] Furthermore, in relay mode: The relay radio frequency received signal is input through the second port of the first switch, sent to the common port of the second duplexer through its fourth port, sent to the common port of the second circulator through the low frequency port of the second duplexer, and then sent to the third receiving component through the second port of the second circulator; the output signal of the third receiving component is sent to the second downconverter, and finally output by the second downconverter to the relay signal processor. The relay radio frequency transmission signal is output from the relay signal processor to the second upconverter, then sent to the common port of the second switch via the second port and the fourth port of the fourth switch, and then sent to the third transmitting component via the second port of the second switch; the output signal of the third transmitting component is sent to the high-frequency port of the second duplexer via the first port and the common port of the first circulator, then sent back to the fourth port of the first switch via the common port of the second duplexer, and finally transmitted from the second port of the first switch. In relay mode, the task radio frequency signal is transmitted synchronously: the task radio frequency receiving signal is input through the first port of the first switch, sent to the common port of the first duplexer through its third port, and sent to the first receiving component through the high-frequency port of the first duplexer; the output signal of the first receiving component is sent to the first down-converter through the first port and the common port of the third switch, and finally output by the first down-converter to the task signal processor; the task radio frequency transmitting signal is output by the task signal processor to the first up-converter, and sent to the first transmitting component through the first port and the third port of the fourth switch; the output signal of the first transmitting component is sent back to the third port of the first switch through the low-frequency port and the common port of the first duplexer, and finally transmitted through the first port of the first switch.

[0009] Furthermore, both the first and fourth switches are double-pole double-throw switches. The double-pole double-throw switches are configured to have the first port and the third port linked to conduct, and the second port and the fourth port linked to conduct, or the first port and the fourth port linked to conduct, and the second port and the third port linked to conduct.

[0010] Furthermore, the first, second, third, and fourth switches operate using a linkage control method, with the specific linkage logic as follows: When both the first switch and the fourth switch are in the "first port and third port are linked to conduct, second port and fourth port are linked to conduct" mode, the second port of the second switch is connected to its common port, and the first port of the third switch is connected to its common port. When both the first and fourth switches are in the "first port and fourth port are linked to conduct, second port and third port are linked to conduct" mode, the first port of the second switch is connected to its common port, and the second port of the third switch is connected to its common port.

[0011] Furthermore, the isolation between the first duplexer and the second duplexer is ≥90dB.

[0012] Furthermore, the operating frequency band of the first circulator is matched with the operating frequency band of the high-frequency port of the connected second duplexer, and the operating frequency band of the second circulator is matched with the operating frequency band of the low-frequency port of the connected second duplexer.

[0013] Furthermore, the performance parameters of each component are as follows: The gains of the first receiving component, the second receiving component, and the third receiving component are all ≥40dB, and the noise figures are all ≤4dB. The gain of both the first and second up-converters is ≥15dB; The dynamic range of both the first and second downconverters is ≥70dB.

[0014] Furthermore, it also includes a mode switching controller, which is electrically connected to the control ports of the first switch, the second switch, the third switch and the fourth switch respectively, and is used to control each switch to turn on and off according to the linkage logic according to external instructions or preset conditions, so as to realize the switching between task working mode and relay working mode.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this invention compared with the prior art are as follows: 1. Precise switch linkage logic and efficient and stable mode switching: By combining double-pole double-throw switches and single-pole double-throw switches, a strict switch linkage logic is designed. Combined with the mode switching controller, four sets of switches can be operated synchronously. The mode switching response time is ≤5ms, which solves the problems of slow switching and easy signal interruption in traditional equipment. 2. High signal isolation and strong anti-interference capability: The duplexer isolation is improved to ≥90dB. Combined with the precise frequency band matching design of the circulator and duplexer ports, crosstalk between transmitted and received signals is blocked at the hardware level, ensuring the independence and stability of signal transmission in dual modes. 3. Excellent component performance and superior communication quality: The noise figure of the receiving component is ≤4dB and the dynamic range of the frequency converter is ≥70dB, which significantly improves the ability to receive weak signals, transmit over long distances, and resist interference, ensuring communication quality in complex environments; 4. High integration and strong adaptability: A single device integrates direct task connection and relay forwarding dual-mode functions, replacing the traditional combination of two independent devices, which greatly reduces the size and cost of the device, and is adaptable to a variety of scenarios that require dynamic switching of communication modes, making it highly practical. 5. Reasonable structural design and clear signal path: The connection relationship of each component and the signal transmission path are scientifically planned, with no redundancy design to avoid signal transmission loss, while facilitating installation, maintenance and later upgrades. Attached Figure Description

[0016] Figure 1 This is an overall principle block diagram of an embodiment of the present invention. Detailed Implementation

[0017] A radio frequency transceiver with both relay and mission modes includes a first switch 1, a first duplexer 2, a second duplexer 3, a first circulator 4, a second circulator 5, a first receiving component 6, a second receiving component 7, a third receiving component 11, a first transmitting component 8, a second transmitting component 9, a third transmitting component 10, a second switch 12, a third switch 13, a fourth switch 14, a first downconverter 15, a first upconverter 16, a second upconverter 17, a second downconverter 18, and a mode switching controller 19. The selection, connection relationship, and working logic of each component are as follows.

[0018] Core component selection and connection relationships: Switching components: The first switch 1 and the fourth switch 14 are both double-pole double-throw switches; the second switch 12 and the third switch 13 are both single-pole double-throw switches. Specifically, the common port of the second switch 12 is unidirectionally electrically connected to the fourth port of the fourth switch 14, and its first port is connected to the second transmitting component 9 and the third transmitting component 10; the common port of the third switch 13 is unidirectionally electrically connected to the RF input terminal of the first down-converter 15, and its first port is connected to the first receiving component 6 and the second port is connected to the second receiving component 7.

[0019] Duplexer and circulator: The common port of the first duplexer 2 is connected to the third port of the first switch 1, the high-frequency port is connected to the first receiving component 6, and the low-frequency port is connected to the first transmitting component 8; the common port of the second duplexer 3 is connected to the fourth port of the first switch 1, the high-frequency port is connected to the common port of the first circulator 4, and the low-frequency port is connected to the common port of the second circulator 5; the second port of the first circulator 4 is connected to the second receiving component 7, and the first port is connected to the third transmitting component 10; the second port of the second circulator 5 is connected to the third receiving component 11, and the first port is connected to the second transmitting component 9.

[0020] Frequency converter and processor: The signal output terminal of the first down-converter 15 is connected to the task signal processor, and the signal output terminal of the second down-converter 18 is connected to the relay signal processor; the signal input terminal of the first up-converter 16 is connected to the task signal processor, and the signal input terminal of the second up-converter 17 is connected to the relay signal processor; the first port of the fourth switch 14 is connected to the first up-converter 16, the second port is connected to the second up-converter 17, and the third port is connected to the first transmitting component 8.

[0021] Control components: The mode switching controller 19 is electrically connected to the first switch 1, the second switch 12, the third switch 13 and the fourth switch 14 respectively, and provides synchronous control signals to each switch.

[0022] Component performance parameters: Duplexer: The isolation of the first duplexer 2 and the second duplexer 3 is ≥90dB, which effectively avoids crosstalk between transmitted and received signals; Circulator: The operating frequency band of the first circulator 4 is matched with the high-frequency port band of the second duplexer 3, and the operating frequency band of the second circulator 5 is matched with the low-frequency port band of the second duplexer 3 to ensure low-loss signal transmission; Receiver components: The first receiver component 6, the second receiver component 7, and the third receiver component 11 all have a gain ≥ 40dB and a noise figure ≤ 4dB, and have the ability to receive weak signals. Inverters: The gain of the first up-converter 16 and the second up-converter 17 is ≥15dB, and the dynamic range of the first down-converter 15 and the second down-converter 18 is ≥70dB, ensuring the quality of the frequency conversion signal and the anti-interference capability.

[0023] Dual-mode operating logic and switch linkage control: Switch linkage logic: The mode switching controller 19 synchronously controls the on / off states of four sets of switches to achieve switching between two operating modes. The specific linkage relationship is as follows: 1. Task mode linkage status: First switch 1 and fourth switch 14 are both "first port and fourth port linked conduction, second port and third port linked conduction", second switch 12 first port is connected to the common port, and third switch 13 second port is connected to the common port; 2. Relay mode linkage status: First switch 1 and fourth switch 14 are both "first port and third port linked conduction, second port and fourth port linked conduction", second switch 12 second port is connected to the common port, and third switch 13 first port is connected to the common port.

[0024] The task mode workflow only transmits task signals: Task signal receiving path: Task RF receiving signal → First switch 1 first port → First switch 1 fourth port → Second duplexer 3 common port → Second duplexer 3 high frequency port → First circulator 4 common port → First circulator 4 second port → Second receiving component 7 → Third switch 13 second port → Third switch 13 common port → First downconverter 15 → Task signal processor. Mission signal transmission path: Mission signal processor → First upconverter 16 → First port of fourth switch 14 → Fourth port of fourth switch 14 → Common port of second switch 12 → First port of second switch 12 → Second transmitting component 9 → First port of second circulator 5 → Common port of second circulator 5 → Low-frequency port of second duplexer 3 → Common port of second duplexer 3 → Fourth port of first switch 1 → First port of first switch 1 → External transmission.

[0025] The relay mode workflow synchronously transmits relay signals and task signals: Relay signal receiving path: Relay RF receiving signal → First switch 1 second port → First switch 1 fourth port → Second duplexer 3 common port → Second duplexer 3 low frequency port → Second circulator 5 common port → Second circulator 5 second port → Third receiving component 11 → Second downconverter 18 → Relay signal processor. Relay signal transmission path: Relay signal processor → Second upconverter 17 → Fourth switch 14 second port → Fourth switch 14 fourth port → Second switch 12 common port → Second switch 12 second port → Third transmitting component 10 → First circulator 4 first port → First circulator 4 common port → Second duplexer 3 high frequency port → Second duplexer 3 common port → First switch 1 fourth port → First switch 1 second port → External transmission; Task signal receiving path: Task RF receiving signal → First switch 1 first port → First switch 1 third port → First duplexer 2 common port → First duplexer 2 high frequency port → First receiving component 6 → Third switch 13 first port → Third switch 13 common port → First downconverter 15 → Task signal processor. Mission signal transmission path: Mission signal processor → First upconverter 16 → First port of fourth switch 14 → Third port of fourth switch 14 → First transmitting component 8 → Low-frequency port of first duplexer 2 → Common port of first duplexer 2 → Third port of first switch 1 → First port of first switch 1 → External transmission.

[0026] In this embodiment, all components are selected from industrial-grade radio frequency communication devices to meet the requirements of high reliability, wide temperature range, and low loss. The specific selection and connection are as follows: 1. Switching assemblies: The first switch 1 and the fourth switch 14 are double-pole double-throw switches, both model SF-SW-503N1P001828-01, supporting the 0-8GHz operating frequency band, with an insertion loss ≤0.5dB; the second switch 12 and the third switch 13 are single-pole double-throw switches, model SF-SW-003N0P001828-01, with an insertion loss ≤0.3dB; each switch is unidirectionally electrically connected via an RF coaxial cable, with a cable loss ≤0.2dB / m.

[0027] 2. Duplexer and Circulator: The first duplexer 2 and the second duplexer 3 are cavity duplexers with an isolation of ≥90dB, and the operating frequency band is adapted according to the actual application scenario; the first circulator 4 and the second circulator 5 are three-port ferrite circulators with an isolation of ≥20dB, and the operating frequency band is precisely matched with the high-frequency and low-frequency port bands of the second duplexer 3, respectively.

[0028] 3. Receiver and transmitter components: The receiver component integrates a low-noise amplifier and filter with a gain ≥40dB and a noise figure ≤4dB; the transmitter component integrates a power amplifier, filter, and digitally controlled attenuator with in-band ripple ≤±0.5dB.

[0029] 4. Inverter and Controller: The upper inverter adopts a superheterodyne structure with a gain ≥15dB and a local oscillator signal purity ≤-80dBc / Hz; the lower inverter adopts a logarithmic intermediate frequency amplification structure with a dynamic range ≥70dB and an intermediate frequency output frequency that can be set according to requirements; the mode switching controller uses an MCU microcontroller, which supports digital instruction input and switch control signal output, with a control delay ≤1ms.

[0030] The physical connections of each component adopt a modular design. All RF interfaces are SMA or SMP connectors, and the control interfaces are RS422 or TTL interfaces. The entire device is encapsulated in a metal shell with electromagnetic shielding function, making it suitable for complex electromagnetic environments.

[0031] II. Mode Switching and Workflow Testing 1. Mode switching control When the mode switching controller 19 receives an external "task mode" command, it immediately outputs a synchronous control signal: controlling the first switch 1 and the fourth switch 14 to switch to "the first port and the fourth port are linked to conduct, and the second port and the third port are linked to conduct", and at the same time controlling the first port of the second switch 12 to conduct and the second port of the third switch 13 to conduct. The entire switching process takes 3-5ms and there is no signal interruption.

[0032] When the “relay mode” command is received, the mode switching controller 19 outputs a reverse synchronization control signal: the first switch 1 and the fourth switch 14 switch to “the first port and the third port are linked to conduct, and the second port and the fourth port are linked to conduct”, the second switch 12 is connected to the second port, and the third switch 13 is connected to the first port. The switching response time is also 3-5ms.

[0033] 2. Task Mode Test Process Receiver test: The task RF signal with a power of -80dBm is input to the first port of the first switch 1, and then passes through the second duplexer 3 and the first circulator 4 to the second receiver 7. The output signal power of the receiver 7 is measured to be -25dBm. After being converted by the first downconverter 15, the intermediate frequency signal is output with a signal-to-noise ratio ≥40dB. Transmission test: The intermediate frequency signal output by the mission signal processor is amplified by the first up-converter 16 and the second transmission component 9, and then transmitted to the first port of the first switch 1 via the second circulator 5 and the second duplexer 3. The fluctuation of the transmitted signal within the band is ≤ ±0.5dB.

[0034] 3. Relay Mode Test Procedure Relay signal test: The relay RF signal with a power of -75dBm is input to the second port of the first switch 1, and then passes through the second duplexer 3 and the second circulator 5 to the third receiving component 11. The intermediate frequency signal output by the second downconverter 18 has a signal-to-noise ratio of ≥38dB. The relay transmission signal is amplified by the second upconverter 17 and the third transmission component 10, and then transmitted through the first circulator 4 and the second duplexer 3 with a transmission loss of ≤3dB. Mission signal synchronization test: In relay mode, the synchronous input mission radio frequency signal passes through the first duplexer 2 and the first receiving component 6 to the first downconverter 15. There is no crosstalk with the relay signal, and the mission signal processing accuracy is consistent with that of the standalone mission mode. The mission transmission signal is amplified by the first transmission component 8 and transmitted normally without mutual interference with the relay transmission signal.

[0035] III. Conclusions of the Examples The RF transceiver in this embodiment has been verified through actual testing. It exhibits precise switch linkage, mode switching response time ≤5ms, duplexer isolation ≥90dB, receiver noise figure ≤4dB, inverter dynamic range ≥70dB, and stable signal transmission with no crosstalk in both modes, fully meeting design requirements. This transceiver boasts high integration and excellent performance, making it widely applicable in scenarios requiring flexible switching between direct task connection and relay communication. It overcomes the technical shortcomings of existing equipment and possesses significant practical value and promising prospects for widespread adoption.

Claims

1. A radio frequency transceiver with both relay and mission modes, characterized in that, Includes switches, duplexers, circulators, transmitting components, receiving components, mode switching controllers (19), up-converters, and down-converters; The first port of the first switch (1) is connected to the task radio frequency signal, the second port is connected to the relay radio frequency signal, the third port is connected to the common port of the first duplexer (2), and the fourth port is connected to the common port of the second duplexer (3). The high-frequency port of the first duplexer (2) is connected to the input of the first receiving component (6), and the low-frequency port is connected to the output of the first transmitting component (8); the high-frequency port of the second duplexer (3) is connected to the common port of the first circulator (4), and the low-frequency port is connected to the common port of the second circulator (5). The first port of the first circulator (4) is connected to the output of the third transmitting component (10), and the second port is connected to the input of the second receiving component (7); the first port of the second circulator (5) is connected to the output of the second transmitting component (9), and the second port of the second circulator (5) is connected to the input of the third receiving component (11); The output of the first receiving component (6) is connected to the first port of the third switch (13), the output of the second receiving component (7) is connected to the second port of the third switch (13), and the output of the third receiving component (11) is connected to the input of the second downconverter (18). The input terminal of the first transmitting component (8) is connected to the third port of the fourth switch (14), the input terminal of the second transmitting component (9) is connected to the first port of the second switch (12), and the input terminal of the third transmitting component (10) is connected to the second port of the second switch (12). The output of the first up-converter (16) is connected to the first port of the fourth switch (14), and the output of the second up-converter (17) is connected to the second port of the fourth switch (14); the input of the first down-converter (15) is connected to the common port of the third switch (13), and the output of the second down-converter (18) is used to connect to the relay signal processor. The common port of the second switch (12) is connected to the fourth port of the fourth switch (14); the common port of the third switch (13) is connected to the input terminal of the first downconverter (15); the fourth port of the fourth switch (14) is connected to the common port of the second switch (12); The mode switching controller (19) is electrically connected to the control ports of the first switch (1), the second switch (12), the third switch (13) and the fourth switch (14) respectively, and is used to control each switch to turn on and off according to the linkage logic based on external instructions or preset conditions.

2. A radio frequency transceiver with both relay and mission modes according to claim 1, characterized in that, In task mode: The task radio frequency received signal is input through the first port of the first switch (1), output through its fourth port to the common port of the second duplexer (3), output through the high frequency port of the second duplexer (3) to the common port of the first circulator (4), and then sent to the second receiving component (7) through the second port of the first circulator (4); the output signal of the second receiving component (7) is sent to the first downconverter (15) through the second port and common port of the third switch (13), and finally output by the first downconverter (15) to the task signal processor; The mission radio frequency transmission signal is output from the mission signal processor to the first upconverter (16), and then sent to the common port of the second switch (12) through the first port and the fourth port of the fourth switch (14). It is then sent to the second transmitting component (9) through the first port of the second switch (12). The output signal of the second transmitting component (9) is sent to the low frequency port of the second duplexer (3) through the first port and the common port of the second circulator (5), and then sent back to the fourth port of the first switch (1) through the common port of the second duplexer (3). Finally, it is transmitted from the first port of the first switch (1).

3. A radio frequency transceiver with both relay and mission modes according to claim 1, characterized in that, In relay mode: The relay radio frequency received signal is input through the second port of the first switch (1), sent to the common port of the second duplexer (3) through its fourth port, sent to the common port of the second circulator (5) through the low frequency port of the second duplexer (3), and then sent to the third receiving component (11) through the second port of the second circulator (5); the output signal of the third receiving component (11) is sent to the second downconverter (18), and finally output by the second downconverter (18) to the relay signal processor; The relay radio frequency transmission signal is output from the relay signal processor to the second up-converter (17), and then sent to the common port of the second switch (12) through the second port and the fourth port of the fourth switch (14), and then sent to the third transmitting component (10) through the second port of the second switch (12); the output signal of the third transmitting component (10) is sent to the high frequency port of the second duplexer (3) through the first port and the common port of the first circulator (4), and then sent back to the fourth port of the first switch (1) through the common port of the second duplexer (3), and finally transmitted from the second port of the first switch (1); Synchronous transmission of task radio frequency signals in relay mode: The task radio frequency receiving signal is input through the first port of the first switch (1), sent to the common port of the first duplexer (2) through its third port, and sent to the first receiving component (6) through the high frequency port of the first duplexer (2); the output signal of the first receiving component (6) is sent to the first downconverter (15) through the first port and common port of the third switch (13), and finally output to the task signal processor by the first downconverter (15); the task radio frequency transmitting signal is output to the first upconverter (16) by the task signal processor, and sent to the first transmitting component (8) through the first port and third port of the fourth switch (14); the output signal of the first transmitting component (8) is sent back to the third port of the first switch (1) through the low frequency port and common port of the first duplexer (2), and finally transmitted by the first port of the first switch (1).

4. A radio frequency transceiver with both relay and mission modes according to claim 1, characterized in that, Both the first switch (1) and the fourth switch (14) are double-pole double-throw switches. The double-pole double-throw switches are either linked to conduct through the first port and the third port, or linked to conduct through the second port and the fourth port, or linked to conduct through the first port and the fourth port, or linked to conduct through the second port and the third port.

5. A radio frequency transceiver with both relay and mission modes according to claim 1, characterized in that, The first switch (1), the second switch (12), the third switch (13), and the fourth switch (14) operate in a linkage control mode. The specific linkage logic is as follows: When both the first switch (1) and the fourth switch (14) are in the "first port and third port are linked to conduct, second port and fourth port are linked to conduct" mode, the second port of the second switch (12) is connected to its common port, and the first port of the third switch (13) is connected to its common port; When both the first switch (1) and the fourth switch (14) are in the "first port and fourth port are linked to conduct, second port and third port are linked to conduct" mode, the first port of the second switch (12) is connected to its common port, and the second port of the third switch (13) is connected to its common port.

6. A radio frequency transceiver with both relay and mission modes according to claim 1, characterized in that, The isolation of both the first duplexer (2) and the second duplexer (3) is ≥90dB.

7. A radio frequency transceiver with both relay and mission modes according to claim 1, characterized in that, The operating frequency band of the first circulator (4) matches the operating frequency band of the high-frequency port of the connected second duplexer (3), and the operating frequency band of the second circulator (5) matches the operating frequency band of the low-frequency port of the connected second duplexer (3).

8. A radio frequency transceiver with both relay and mission modes according to claim 1, characterized in that, The performance parameters of each component are as follows: The gain of the first receiving component (6), the second receiving component (7) and the third receiving component (11) are all ≥40dB and the noise figure is ≤4dB. The gain of the first up-converter (16) and the second up-converter (17) is ≥15dB; the dynamic range of the first down-converter (15) and the second down-converter (18) is ≥70dB.

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