626 results about "Diplexer" patented technology

The invention belongs to the technical field of microwave passive devices, and discloses a millimeter wave duplex power divider based on a multilayer metal gap waveguide and a working method thereof, and the millimeter wave duplex power divider comprises a common channel, a low-frequency filtering power divider and a high-frequency filtering power divider; the input port of the common channel is used for being connected with an electromagnetic wave signal source, and the output end of the common channel comprises an upper output channel and a lower output channel. Wherein the first output channel is connected with the input port of the low-frequency filtering power divider, and the second output channel is connected with the input port of the high-frequency filtering power divider; the low-frequency filtering power divider and the high-frequency filtering power divider are stacked up and down and adopt double-layer metal gap waveguide structures; wherein a fourth-order resonant cavity is arranged in the double-layer metal gap waveguide structure so as to realize a duplex power division function; functions of a duplexer and a power divider are integrated, loss caused by machining and assembling errors is greatly reduced, and low insertion loss and high isolation between channels of the duplex power divider are achieved.

The invention discloses a waveguide duplexer for a dual-band probe and application. The waveguide duplexer comprises a common end waveguide port, a D-waveband standard waveguide port, a G-waveband standard waveguide port, a non-standard waveguide channel of a common end, a stepped transition structure from a non-standard waveguide to a ridge waveguide, and a T-shaped connection structure among a high-frequency channel, a low-frequency channel and a common end channel. The invention discloses an impedance matching structure for transition from a connection structure to a low-frequency channel, the low-frequency channel, a transition structure from the low-frequency channel to a D-band standard waveguide, a high-frequency channel and a transition structure from the high-frequency channel to a G-band standard waveguide, and relates to the technical field of microwave radio frequency testing. The transition structure from each channel to the standard waveguide of the corresponding wave band provides an interface connected with other devices or equipment, and has the good channel transmission characteristics of low loss, good isolation between channels and the like, and as most structures adopt the ridge waveguide design, the working bandwidth is wide and the device structure is compact on the premise of large power capacity.

The invention relates to the technical field of spaceflight measurement and control phased-array antennas, aims to solve the problems that an existing antenna is few in tracking measurement and control flying targets and limited in beam scanning range, and provides a planar subarray distributed omnidirectional phased-array antenna which comprises an antenna framework, a wave control system and a plurality of antenna subarrays. The antenna framework is provided with a plurality of windows, each window is internally provided with an antenna sub-array, and the windows are matched with the antenna sub-arrays; each antenna sub-array comprises a beam forming network, a duplexer, a multi-channel TR, a signal processing module and n * n antenna array elements arranged in an array, and n is an integer greater than or equal to 2; the wave control system is arranged in the antenna skeleton and is used for performing in-phase superposition on signal energy of each antenna array element in different target projection areas on an expected point and performing phase-shifting shunt control to realize full-airspace multi-beam signal receiving and transmitting; the omnidirectional phased-array antenna is wide in beam scanning range and can realize multi-target measurement and control.

The invention belongs to the technical field of high-orbit satellite communication. A ground station antenna S, Q, V multi-band dual-polarization feed source implementation device comprises an S-band dual-polarization feed source network, the S-band dual-polarization feed source network comprises a polarization switch, first duplexers, first sum-difference networks, a polarizer assembly and an S feed source horn, the polarization switch is connected with the two first duplexers, each first duplexer is connected with the first sum-difference network, and the S feed source horn is connected with the second duplexers. The output of one first sum-difference network is connected to a left-hand polarization port of each polarizer assembly, the output of the other first sum-difference network is connected to a right-hand polarization port of each polarizer assembly, and each polarizer assembly is connected with an S feed source horn; the Q / V frequency band feed source network comprises two second duplexers which are respectively connected with a quadrature device, a polarizer is respectively connected with the quadrature device and a tracker, and the tracker is respectively connected with a difference signal synthesis network and a Q / V corrugated horn; and the S feed source horns are arranged around the Q / V corrugated horns. And the optimal utilization effect of space and signal receiving and transmitting efficiency is achieved.

A dual mode surface acoustic wave (SAW) filter includes a piezoelectric substrate, a pair of reflectors disposed on the piezoelectric substrate, and N input and output interdigital transducers (IDTs) disposed on the piezoelectric substrate and between the pair of reflectors and alternately arranged in a lateral direction. Each IDT includes a pair of comb electrodes with a plurality of electrode fingers, adjacent electrode fingers pointing in opposite directions. The total number of electrode fingers in each IDT is an odd number greater than or equal to 3. The invention also discloses a receiving filter and a duplexer.

A duplexer including a support substrate, a reception signal terminal, a transmit signal terminal, an antenna terminal, a receive side filter formed on the support substrate and electrically coupling the reception signal terminal to the antenna terminal, a transmit side filter formed on the support substrate and electrically coupling the transmit signal terminal to the antenna terminal, a side wall surrounding the receive side filter and the transmit side filter, and a cap wafer disposed on the side wall and enclosing the receive side filter and the transmit side filter in a cavity defined by the cap wafer, the side wall, and the support substrate, there being no post disposed on the antenna terminal and in contact with the cap wafer.

A method and an apparatus for self-interference cancellation in a communication device. The communication device includes an antenna configured to transmit a transmit signal and receive a receive signal through a duplexer in FDD communications, a first analog to digital converter (ADC) configured to convert the receive signal from analog to digital, a coupler configured to couple a sample of the transmit signal to a second ADC, which is configured to convert the sample of the transmit signal from analog to digital, and self-interference cancellation circuitry configured to process the digital sample of the transmit signal to generate a self-interference cancellation signal and apply the self-interference cancellation signal to the digital receive signal to cancel an amount of interference induced in the receive signal by the transmit signal. The SIC process provides additional isolation between TX signal and RX signal. The additional isolation could be utilized to relief the isolation requirement for the duplexer, reducing the cost and form factor of the duplexer.

The invention provides a Q / V frequency band large-scale satellite communication load channel optimization method, which comprises a forward input link and a backward output link, and is characterized in that the forward input link comprises a V frequency band multi-beam antenna feed source array, a plurality of input preselectors, a V frequency band low noise amplifier input switch ring and a V / Ka integrated receiver assembly which are connected in sequence; the output end of the V-band multi-beam antenna feed source array is connected with the input end of the V / Ka integrated receiver assembly through a waveguide. The reverse output link comprises a Ka / Q frequency converter, a Q-band channel filter, a Q-band traveling wave tube amplifier, a change-over switch, a Q-band output duplexer or filter and a Q-band feed beam which are connected in sequence, and the output end of the Ka / Q frequency converter is connected to the input end of the Q-band channel filter through a waveguide; and the output end of the Q-band channel filter is directly connected to the input end of the Q-band traveling wave tube amplifier through the waveguide. Therefore, the method is low in link loss, high in space utilization rate and high in feasibility.

The utility model discloses a switching matrix of a high-power multipath coaxial switch, a coaxial switch switching matrix and a controller. The coaxial switch matrix comprises a plurality of coaxial switches, a plurality of output antennas, a plurality of power sources, a dummy load, a duplexer and a power combiner. The coaxial switch is used for connecting each component, the power source can be connected to any output antenna or dummy load, the duplexer is used for receiving two power sources and outputting the two power sources to any output antenna or dummy load, and the power combiner is used for receiving and combining a plurality of power sources and outputting the power sources to a specific output antenna or dummy load; and the controller is used for controlling the coaxial switch to switch.

The invention relates to the technical field of duplexers, and discloses a duplexer temperature compensation parameter automatic adjusting method and device. The method comprises the following steps: performing working temperature sampling on a duplexer to obtain temperature sampling data, and performing distribution feature extraction on the temperature sampling data to obtain temperature feature data; inputting the temperature feature data into a mechanism information neural network for feature reconstruction to obtain temperature compensation features; performing radial basis function neural network mapping on the temperature compensation characteristics to obtain a duplexer frequency drift state quantity; performing sliding window adaptive Kalman filtering operation on the frequency drift state quantity of the duplexer to obtain a compensation parameter; the compensation parameters are input into a feedforward compensation controller, a voltage-controlled resonator of the duplexer is adjusted through a sliding mode control structure, a frequency compensation signal is obtained, and stable compensation of the frequency of the duplexer is achieved.

The utility model relates to a 5G optical fiber remote system supporting a voice function. Comprising a duplexer 1, a low noise amplifier 1, a down converter 1, an AD analog-to-digital converter 1, a power amplifier 1, an up converter 1, a DA digital-to-analog converter 1, a single chip microcomputer MCU1, a voice processing module, a duplexer 2, a low noise amplifier 2, a down converter 2, an AD analog-to-digital converter 2, a power amplifier 2, an up converter 2, a DA digital-to-analog converter 2, a digital signal processor FPGA1 and an optical module 1. The far-end unit comprises a duplexer 3, a low-noise amplifier 3, a down-converter 3, an AD analog-to-digital converter 3, a power amplifier 3, an up-converter 3, a DA digital-to-analog converter 3, a single-chip microcomputer MCU2, a duplexer 4, a low-noise amplifier 4, a down-converter 4, an AD analog-to-digital converter 4, a power amplifier 4, an up-converter 4, a DA digital-to-analog converter 4, a digital signal processor FPGA2 and an optical module 2. According to the utility model, main parameters can be modified, set and output according to voice.

The invention discloses a communication circuit based on an electric balance duplexer. The communication circuit is used for improving the signal resource utilization rate of the communication circuit. The circuit provided by the invention comprises a transmitting and receiving antenna, an electric balance duplexer, an impedance adjusting network and a transmitting antenna, the transmit-receive antenna end of the electric balance duplexer is electrically connected with the transmit-receive antenna. The electric balance end of the electric balance duplexer is electrically connected with the transmitting antenna through the impedance adjusting network, and the impedance adjusting network is used for providing impedance matched with the transmitting and receiving antenna for the electric balance end; the electric balance duplexer comprises a signal sending end, and the electric balance duplexer is used for transmitting a to-be-sent signal provided by the signal sending end to the receiving and sending antenna to execute sending, and transmitting the to-be-sent signal to the sending antenna through the impedance adjusting network to execute sending.

The invention provides a dielectric waveguide filter, a construction method and a dielectric waveguide duplexer. The construction method of the dielectric waveguide filter comprises the following steps: selecting a dielectric material based on a given target passband index; establishing a matrix four-mode dielectric waveguide resonator, and adjusting the size of a rectangular dielectric waveguide to enable the resonant mode frequency to reach a target frequency band; carrying out electromagnetic field distribution analysis on a single four-mode dielectric waveguide resonator with a set size, positioning the distribution position of a resonance mode according to the distribution condition of an electromagnetic field, and respectively embedding four blind holes in the position where the electromagnetic field is strongest in distribution so as to realize polarization fixation and frequency regulation and control on the resonance mode; selecting a coupling topology to construct a dielectric filter based on frequency regulation and control of the four-mode dielectric waveguide resonator; the additional coupling blind holes are added on the basis of the coupling topological structure so as to regulate and control the mutual coupling between the adjacent resonators. According to the technical scheme, the problem that the size of a filter in the prior art is large is effectively solved.

The invention discloses a low-power-consumption Ku / Ka dual-band transceiver, which relates to a low-power-consumption dual-band transceiving combination in the field of communication, realizes time-sharing work of Ku and Ka bands, and has a radio frequency signal transceiving function. The ultra-low-power-consumption Ku-band band-pass filter is composed of an intermediate frequency unit, a Ku-band receiving and transmitting module, an ultra-low-power-consumption modulation switch circuit, a Ka-band receiving and transmitting module, a Ku-band duplexer, a Ka-band duplexer, a frequency source module and the like. Low power consumption is realized through technologies of circuit multiplexing, pulse modulation switch switching, integrated design and the like. The low-power-consumption miniaturized dual-band transceiver has the advantages of miniaturization, low stray, good amplitude-frequency, stable and reliable performance and the like, can normally work in a relatively severe environment, and is particularly suitable for serving as a low-power-consumption miniaturized dual-band transceiver of a satellite communication terminal.

An antenna system includes a loop conductor and non-loop conductor configured to provide respective loop and dipole antenna functionality. A signal feed mechanism connects to both conductors at a signal feed point for simultaneous signal transceiving. The non-loop conductor comprises two elongate arms with an offset feed point creating shorter and longer arms, where the longer arm has increased width via a loop-shaped portion. When incorporated in eyewear devices, the loop-shaped portion extends circumferentially along a lens holder to retain lenses. The conductors may be configured through a diplexer for different frequency domains, with the non-loop conductor serving as a GPS antenna and the loop conductor as a data communication antenna. The radiation patterns of the conductors may be substantially orthogonal when driven by the signal feed mechanism. The system provides integrated antenna and mechanical functionality in wearable devices.

The invention provides a harmonic enhancement type load traction system. The harmonic enhancement type load traction system comprises a circulator, an impedance tuner, a high-pass filter, a radio frequency power amplifier and a non-reflection duplexer which are connected end to end to form a closed-loop structure, the input end of the circulator is connected with a bias structure of a to-be-tested device, and the non-reflection duplexer is connected with a fundamental wave signal to form an open-loop structure; the active closed-loop load traction structure is used at the harmonic wave position, the active open-loop load traction structure is used at the fundamental wave position, tuning of the fundamental wave and tuning of the second harmonic wave are effectively compatible, the integration level is high, and impedance tuning of the harmonic wave can be achieved under the condition that other equipment such as a signal source is not introduced.

The invention provides a shipborne relay vertical omnidirectional communication array antenna, which relates to the technical field of wireless communication and comprises a base, a low-frequency printed substrate and two high-frequency printed substrates, a plurality of low-frequency dipole units and second phase guider coupling units are arranged on the two surfaces of the low-frequency printed substrate in an array manner, and the low-frequency dipole units form an array through a combiner; a plurality of high-frequency dipole subunits and first phase guider coupling units are arranged on the two surfaces of the high-frequency printed substrate in an array manner, and each high-frequency dipole subunit outputs through a parallel connection network; the low-frequency printed substrate and one group of high-frequency signals are connected with one antenna port of the 5G communication module through the duplexer combiner, and the other group of high-frequency signals are independently output and connected with the other antenna port of the 5G communication module. The dipole unit adopts a parallel feed array, so that the gain of the antenna in the horizontal direction is improved, and the omnidirectional coverage area and gain of the antenna are increased in a turning manner; and the phase guider coupling unit beside the dipole unit improves the out-of-roundness of the antenna.

The invention provides an unmanned aerial vehicle electromagnetic interference positioning method and system, and relates to the technical field of unmanned aerial vehicles, and the method comprises the steps: 1, carrying out the broadband frequency spectrum scanning of a remote control link frequency band, a telemetering link frequency band and an image transmission frequency band at the full flight stage of an unmanned aerial vehicle, detecting an interference signal in a frequency hopping communication system in real time, and transmitting the interference signal to an unmanned aerial vehicle; identifying random hopping frequency conversion points covered by the interference signals to form a hopping frequency conversion point set; and step 2, inputting the hopping frequency point set into a radio frequency sharing front end, coupling a radio frequency signal of a communication antenna to a spectrum analysis unit through a duplexer, and performing signal compensation on a coupling path by utilizing automatic gain control and a phase equalizer to obtain corrected interference spectrum data. The anti-interference capability and the flight safety of the unmanned aerial vehicle in a complex electromagnetic environment are improved, and the avoidance path is generated to guarantee the safe flight of the unmanned aerial vehicle.

A direction finding system for navigation interference detection relates to the technical field of navigation communication and comprises a shell, a cover plate and an interface module, an antenna is mounted at the top of the shell, a receiver is arranged in the shell, an input end of the receiver is electrically connected with a north finder and a duplexer respectively, an output end of the receiver is electrically connected with a switch, the duplexer is electrically connected with the antenna, and the antenna is electrically connected with the cover plate. The north seeker, the switch and the receiver are correspondingly and electrically connected with the power supply; the bottom of the shell is correspondingly and hermetically connected with the cover plate, the bottom surface of the cover plate is provided with an interface module, the interface module is provided with a power supply input interface electrically connected with a power supply and a network interface electrically connected with a switch, and the bottom of the interface module is provided with a connector for mounting a tripod; the direction finding system has high portability and stability.

Systems and methods are described herein for providing a direct radiating antenna (DRA) for installation on a communication satellite. The DRA is a phased array of microstrip patch antennas implemented in a very compact profile on a planar substrate. Embodiments of array are implemented as an array of radiating element configurations, each having a microstrip radiating element (e.g., a square patch) coupled to a first side of the planar substrate, amplifiers coupled to a second side of the planar substrate, and filters (e.g., diplexers) coupled between the radiating elements and amplifiers. A thermal conduction layer (e.g., a graphoil or vapor chamber layer) is thermally coupled with the second side of the planar substrate, and a thermal radiation layer (e.g., an optical solar reflector) is thermally coupled with the thermal conduction layer.

The invention provides a same-time same-frequency-band full duplex communication device with rapid and agile frequency. Comprising a duplexer, a first frequency hopping wave trap, a first radio frequency amplifier, a first frequency hopping filter, a second frequency hopping wave trap, a second radio frequency amplifier, a second frequency hopping filter, a third radio frequency amplifier, a band-pass filter, an analog-to-digital converter, a standard frequency, a channel controller, a baseband processor, a digital-to-analog converter, a fourth radio frequency amplifier and a third frequency hopping filter. A fifth radio frequency amplifier; and a fourth frequency hopping filter. According to the simultaneous same-frequency-band full-duplex communication device with the fast and agile frequency, the working frequency of the full-duplex communication device covers 100 MHz to 1 GHz, the frequency range is wide, the communication efficiency is high, time delay is small, self-interference generated by a local transmitter is effectively restrained, application of a full-duplex communication system in the wide-frequency-band simultaneous same-frequency-band high-speed frequency hopping process can be met, and the full-duplex communication device is suitable for wide-frequency-band simultaneous same-frequency-band high-speed frequency hopping. The transceiving isolation of the system duplexer is greater than 30dBc, and the notch suppression capability of the receiving path is greater than 65dBc.

The invention relates to the technical field of bulk acoustic wave resonators, and particularly provides a temperature compensation type bulk acoustic wave resonator, a preparation method thereof and a duplexer, the temperature compensation type bulk acoustic wave resonator comprises a substrate, a bottom electrode, a piezoelectric layer, a top electrode and a temperature compensation layer which are sequentially connected from bottom to top, the substrate is provided with an acoustic reflector, and the temperature compensation layer is provided with a dielectric layer. The temperature drift coefficient of the temperature compensation layer is smaller than that of the piezoelectric layer, the temperature compensation layer comprises a first compensation part, and the boundary of the projection of the first compensation part in the overlook direction is located in the boundary of the projection of the acoustic reflector in the overlook direction; the temperature compensation type bulk acoustic wave resonator can effectively solve the problem that the resonant frequency of the bulk acoustic wave resonator is easily influenced by the temperature change due to the fact that the material characteristic of the piezoelectric layer shifts along with the temperature change.

An LC filter includes a multilayer body, plate electrodes, capacitor electrodes, and inductor vias. The capacitor electrodes each define a capacitor between the plate electrode and a corresponding one of the capacitor electrodes. A first inductor via is connected between a first capacitor electrode and a first plate electrode. A second inductor via is connected between a second capacitor electrode and the first plate electrode. A third inductor via is connected between a third capacitor electrode and the first plate electrode. A fourth capacitor electrode faces the first and second capacitor electrodes. A fifth capacitor electrode faces the second and third capacitor electrodes. A sixth capacitor electrode faces the first and third capacitor electrodes.

The disclosed front end architectures are configured to conglomerate duplexer transmission (TX) contours into a specific or targeted region. This enables the power amplifier (PA) to match a larger number of frequency bands without the help of additional matching networks. The disclosed architectures are advantageous because they reduce the number of components (e.g., surface mount technology components (SMTs)) required for radio-frequency (RF) modules, such as front end modules, power amplifier modules, and the like. The disclosed architectures are also advantageous because they improve performance of the modules across a wider range of frequency bands.

Duplexer (1), comprising: an antenna connection (11), a transmission connection (12), a receiving connection (13), a transmission filter connected between the antenna connection (11) and the transmission connection (12), a receiving filter connected between the antenna terminal (11) and the receiving terminal (13), and an inductance component (4) connected at one end to the antenna terminal (11) and connected at another end to a ground potential, wherein the transmission filter comprises an elastic wave filter having a ladder circuit configuration, the elastic wave filter including a piezoelectric substrate (5), a series arm resonator (51, 52, 53, 54) and a plurality of shunt arm resonators (P1 - P4), the series arm resonator (51, 52, 53, 54) comprising an elastic wave resonator formed on the piezoelectric substrate and the shunt arm resonators (P1 - P4) each comprising an elastic wave resonator formed on the piezoelectric substrate (5), and wherein one of the shunt arm resonators provided in a shunt arm arranged closest to the transmission terminal in the ladder circuit configuration comprises a transmission-side shunt arm resonator (P1), and the transmission-side shunt arm resonator (P1) is arranged closer to one side of the piezoelectric substrate (5) than a rest of the shunt arm resonators (P2 - P4), the one side (5a) extending in a direction parallel to a propagation direction of an elastic wave in the transmission-side shunt arm resonator (P1), characterized in that the inductance component (4) is arranged outside one side of the piezoelectric substrate such that the electromagnetic coupling between the inductance component (4) and the transmitting-side shunt arm resonator (P1) with its own ground connection is stronger than the electromagnetic coupling between the inductance component (4) and the rest of the shunt arm resonators (P2 - P4).

The invention discloses a duplexer topological structure, a radio frequency module and electronic equipment. The duplexer topological structure comprises a transmitting end filter connected between a transmitting end and an antenna port; a receiving end filter connected between the receiving end and the antenna port; wherein the receiving end filter comprises a plurality of first series resonators which are sequentially connected in series between the receiving end and the antenna port; every two adjacent first series resonators are grounded through a first parallel resonator; and the adjusting branch is connected with the receiving end filter and is used for adjusting the position of the parallel resonance point in the receiving end filter, so that the body wave of the resonator in the receiving end filter is located outside the passband of the receiving end filter. According to the technical scheme, the problem of insertion loss deterioration caused by the fact that the body wave of the resonator falls into the passband can be avoided, the insertion loss of the resonator can be reduced, and then the performance of the duplexer can be improved.

The invention discloses a multi-band CTS antenna, comprising a feeding network, a multiplexing network and a radiating unit stacked from bottom to top, wherein the feeding network comprises a first metal plate, a second metal plate, four line sources, a first input port, a second input port and a third input port, the multiplexing network comprises a third metal plate and three duplexers, the third duplexer comprises a first low-pass filter, a first band-stop filter and a first E-plane power divider, the second duplexer comprises a second low-pass filter, a second band-stop filter and a second E-plane power divider, the first duplexer comprises a third low-pass filter, a third band-stop filter and a third E-plane power divider, and the radiating unit comprises a fourth metal plate, a fifth metal plate, two one-to-eight power dividers with consistent structures and parameters and sixteen CTS radiating slots with consistent structures and parameters; the antenna has the advantage of being able to cover K-band, Ka-band and Ku-band at the same time, and having high applicability in communication environment.

The invention relates to the technical field of testing, in particular to a device forward non-linear testing device and a testing method.The device forward non-linear testing device comprises a signal source, a frequency spectrograph, a duplexer and a load, the duplexer is electrically connected with the frequency spectrograph, the load and a to-be-tested piece, the signal source is electrically connected with the to-be-tested piece, and the frequency spectrograph is used for monitoring the forward non-linear degree of the to-be-tested piece; in this way, in the testing process, the signal source transmits a signal to the to-be-tested piece, due to the nonlinear factor of the to-be-tested piece, nonlinear energy such as harmonic stray is generated, one part of the nonlinear energy is reflected, and the other part of the nonlinear energy continues to be transmitted after passing through the to-be-tested piece; the nonlinear energy continuously transmitted by the to-be-tested piece is transmitted to the load and the frequency spectrograph through the duplexer, and the forward nonlinearity degree of the to-be-tested piece can be monitored on the frequency spectrograph, so that the forward nonlinearity degree of the to-be-tested piece is tested.

A method for reducing receive band leakage may include: sensing, at a full duplexer, passive intermodulation distortion and power amplifier distortion; generating, at a processing device, a passive intermodulation distortion and power amplifier distortion cancellation signal; and cancelling, on a receive path, the passive intermodulation distortion and power amplifier distortion using the passive intermodulation distortion and power amplifier distortion cancellation signal.

The invention provides a radio frequency front-end assembly and a working method thereof. A radio frequency front end assembly comprises a first amplification module, a second amplification module, a third amplification module, a fourth amplification module, a switch assembly used for realizing dual polarization switching, a first circulator, a second circulator, a third circulator, a fourth circulator, a duplexer A, a duplexer B and a power divider. The first amplification module and the second amplification module are connected with the first circulator and the second circulator in a one-to-one correspondence manner; the third amplification module and the fourth amplification module are connected with the third circulator and the fourth circulator in a one-to-one correspondence manner; the switch assembly is connected with the first circulator, the second circulator, the third circulator and the fourth circulator. The first circulator and the second circulator are both connected with the duplexer A, and the third circulator and the fourth circulator are both connected with the duplexer B; and the duplexer A and the duplexer B are both connected with the power divider.