226 results about "Duplexer" patented technology

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 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 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 relates to the technical field of optical communication, in particular to a single-fiber bidirectional device with specific wave band reflection and an optical module thereof, comprising a transmitting TO-CAN, a receiving TO-CAN, an integrated tube and a tail fiber pin, the transmitting TO-CAN1 is coupled with one end of the integrated tube, the receiving TO-CAN1 is coupled with the side surface of the integrated tube, and the tail end of a tail fiber of the tail fiber pin is coupled with the other end of the integrated tube; a beam splitter and an optical filter are arranged at the central axis part of the integrated tube; the beam splitter is used for reflecting light returned from the tail fiber pin into the receiving TO-CAN; the optical filter is arranged at a light inlet of the receiving TO-CAN; a grating fiber core is arranged in the tail fiber pin, the grating fiber core is located at the tail end of the tail fiber pin, and the grating fiber core is used for reflecting light with a specific wavelength in an optical signal sent by the transmitting TO-CAN into a receiving TO-CAN.

A multi-frequency OMT system comprises an OMT, the upper portion of the OMT comprises an OMT input end, and the lower portion of the OMT comprises a first output end and a second output end. The first duplexer is positioned below the OMT, the upper part of the first duplexer comprises a first input end, the lower part of the first duplexer comprises a first high-frequency output end and a first low-frequency output end, and the first output end is connected with the first input end; the second duplexer is located below the OMT, the upper portion of the second duplexer comprises a second input end, the lower portion of the second duplexer comprises a second high-frequency output end and a second low-frequency output end, and the second output end is connected with the second input end. Through reasonable arrangement of component structures and frequency division of dual-polarized antenna signals, the purpose that a pair of antennas of a single-hop link perform four-group transceiving at the same time is achieved, meanwhile, high-power and high-capacity communication technology requirements are met, spectrum resources and iron tower resources are saved, the utilization rate of microwave antennas is increased, and the cost is reduced. And the method is suitable for mass production.

The invention discloses a frequency duplex synthesis method for realizing a terahertz ultra-wideband frequency multiplier, and relates to the technical field of submillimeter wave / terahertz solid-state frequency multipliers, a'frequency division-frequency multiplication-frequency combination 'duplex circuit architecture is adopted, a frequency division circuit and a frequency combination circuit are both based on a hybrid network type waveguide duplexer design, and the frequency division-frequency multiplication-frequency combination duplex circuit design is adopted. The frequency multiplier circuit is realized by adopting a hybrid integrated frequency doubler, the cost is low, the cavity structure is completely processed by adopting a CNC milling process, and the solid-state characteristic is realized; therefore, under the condition that the frequency doubling / frequency conversion efficiency is not reduced, the frequency doubler capable of covering the full frequency band of 170-260GHz (WR-4 frequency band) can be realized, namely, the double advantages of wide frequency band and high efficiency of the frequency doubler are considered, and the technical problem that the wide frequency band and the high efficiency of a submillimeter wave / terahertz schottky frequency doubler at the present stage cannot be achieved at the same time is solved.

A communication circuit includes a transmission terminal to which a transmission signal is supplied, a first duplexer that has a transmission node, a reception node, and a common node, a first filter that has a first end part electrically connected to the common node of the first duplexer and a second end part electrically connected to an antenna terminal, a first auxiliary output terminal that outputs the transmission signal to an external circuit, an inductor that is part of a second filter and has a first end part and a second end part that is electrically connected to the first auxiliary output terminal, and a first switch that switches the electrical connection destination of the transmission terminal between the transmission node of the first duplexer and the first end part of the inductor.

The invention discloses a dynamic parameter testing system and method for a bidirectional TVS device, and relates to the technical field of parameter testing, a specific miniature assistance unit is dynamically generated for each group of dynamic parameter data groups to be tested, and the corresponding dynamic parameter data groups are received through an introduction port; identifying interference data of the dynamic parameter data group by using an inspection mechanism of the micro assistance unit and discharging the interference data; simulation test events in the twin model are injected into the miniature assistance unit, low-quality data in the dynamic parameter data group are discharged through interaction of the simulation test events, and when the number of times of interaction reaches a preset threshold value, the miniature assistance unit is input into an actual test environment; and carrying out dynamic parameter test on the bidirectional TVS device by using the residual dynamic parameter data group carried by the micro assistance unit, and outputting effective test data through an output port. The problem that dynamic parameter measurement is inaccurate due to low data quality, environmental interference and incomplete test coverage in a traditional test method is solved.

The invention discloses a millimeter wave communication antenna broadband feed source network four-port device and an application method thereof, and relates to the technical field of microwave communication, the millimeter wave communication antenna broadband feed source network four-port device comprises a circular rectangular transition structure, a circular polarizer and an orthogonal mode coupling duplexer assembly which are integrated in sequence; the circular rectangular transition structure is used for corresponding conversion transition between the standard rectangular waveguide and the circular waveguide; the circular polarizer is provided with an orthogonal stepped ridge, so as to convert the circularly polarized wave into an orthogonal linearly polarized wave or convert the orthogonal linearly polarized wave into the circularly polarized wave corresponding to the signal receiving and transmitting direction; the orthogonal mode coupling diplexer assembly is used for separating the two paths of orthogonal linear polarized waves in the synthetic state or synthesizing the two paths of orthogonal linear polarized waves in the separated state corresponding to the signal receiving and transmitting direction, and can screen signals passing through a specific receiving and transmitting frequency band. The technical problems that in the prior art, a dual-polarized antenna technology for dual-channel communication is large in size, complex in structure and high in cost, and the overall performance is difficult to meet expected requirements are solved.

The application discloses a kind of compatible signal processing devices of measurement and control communication navigation, it is related to satellite measurement and control communication technical field.The device includes measurement and control mobile communication navigation signal access circuit, measurement and control communication navigation signal processing circuit, radio frequency transmitting signal amplification and receiving signal low noise amplification circuit, duplexer circuit, antenna circuit, power supply circuit.The device of the application measurement and control communication navigation signal processing unit and radio frequency antenna unit adopt one line pass interface, support integrated installation, also support radio frequency antenna unit external installation mode.The application adopts radio frequency unit and duplexer joint design, the isolation of transceiver channel interval is high, can guarantee the reliable reception of low-speed low-frequency spectral density measurement and control signal.The application adopts modular design, high degree of integration, the whole machine debugging workload is small, stable and reliable performance, interface is simple and flexible, simple structure.

The application discloses a high-isolation Ku-band full-bandwidth linear polarization duplexer for satellite communication, an E-plane rectangular waveguide is used for connecting a base mode TE 10 mode in a vertical polarization form in an uplink and outputting to a first E-plane 90-degree twist waveguide, the first E-plane 90-degree twist waveguide rotates a propagation direction of the base mode TE 10 mode by 90 degrees and then outputs to a vanished-mode ridge waveguide band-pass filter, the vanished-mode ridge waveguide band-pass filter selects the base mode TE 10 mode in the uplink and outputs to a second E-plane 90-degree twist waveguide, the second E-plane 90-degree twist waveguide rotates a propagation direction of the base mode TE 10 mode by 90 degrees and then outputs to an orthogonal mode coupler, the orthogonal mode coupler is used for converting the base mode TE 10 mode into a base mode TE 11 mode and then outputting and converting the base mode TE 11 mode into TE 01 mode, and outputting the TE 01 mode to a stepped impedance filter, the stepped impedance filter selects TE 01 mode in a downlink, and outputting the TE 01 mode to a copper drum H-plane rectangular waveguide; the application has the advantages of simple structure, wide working frequency band and the ability to cover the whole Ku-band bandwidth.

The invention discloses a communication method and device, a terminal, network side equipment and a medium, and belongs to the technical field of communication, and the communication method comprises the steps that the terminal sends or receives signals through M radio frequency links, each radio frequency link comprises at least one power amplifier, the duplexer or the band-pass filter is connected with the at least one power amplifier, the different radio frequency links are used for sending or receiving signals in different frequency ranges in the same frequency band, and M is an integer larger than 1; and the terminal sends a first signaling to the network side equipment, wherein the first signaling comprises information of a frequency range covered by a radio frequency link of the terminal and working mode information of the terminal on the radio frequency link.

The present application provides a resonator, filter, duplexer, multiplexer and communication device, the resonator comprises a resonant cavity, the resonant cavity has a resonant cavity and an open end, the resonator further comprises a deformed cover plate covering the open end and connected with the resonant cavity, a resonant tube located in the resonant cavity, and an adjusting mechanism arranged on the deformed cover plate, a groove is formed on the side of the deformed cover plate away from the resonant cavity, the adjusting mechanism is arranged in the groove and is used to provide a force in the axial direction of the resonant tube, so that the bottom of the groove is continuously deformed to adjust the distance between the deformed cover plate and the resonant tube. The present application can improve the intermodulation performance and high-power performance of the product, and at the same time, the production pass rate of the product can be improved, the product scrap rate and maintenance cost can be reduced, and the market competitiveness of the product can be improved.

This invention relates to the field of radio frequency device design optimization technology, and provides an AI-based duplexer design optimization method and system. The method includes: predicting the event frequency characteristics of the future application environment; determining a correction factor based on the magnitude of the exceedance when the event frequency exceeds a threshold; correcting the key structural parameters of the duplexer to be designed based on the correction factor; and completing the duplexer design based on the corrected key structural parameters. Compared to existing methods that rely solely on experience or a single indicator for design, this invention achieves closed-loop optimization from identifying additional environmental factors to adaptive parameter adjustment, exhibiting higher accuracy and foresight, while avoiding the cost increase caused by over-design, and significantly improving the duplexer's adaptability and long-term reliability in complex environments.

The utility model relates to a filter circuit, a dielectric filter and a duplexer, and the filter circuit comprises a signal input end which is used for inputting a signal; the signal output end is used for outputting a signal; the resonance unit comprises a plurality of resonance circuits which are sequentially arranged between the signal input end and the signal output end in parallel; the coupling inductor unit is arranged between the signal input end and the grounding end and between the signal output end and the grounding end, and the coupling capacitor unit is arranged between the signal input end and the first resonance circuit and between the signal output end and the last resonance circuit. According to the utility model, the problem of large return loss in an ultra-wide passband can be solved, standing waves are effectively improved, the working efficiency of the filter is improved, and the communication effect is improved. The dielectric filter is connected with the grounding silver layer on the outer surface of the ceramic substrate through leading out a first connecting line and a second connecting line from the input port and the output port respectively, and plays a role of equivalent inductance.

This utility model discloses an easy-to-install duplexer, belonging to the field of duplexer technology, aiming to solve the problem of the extremely difficult disassembly process when the duplexer needs maintenance due to equipment failure in existing technologies. It includes a duplexer body and a mounting plate. The mounting plate is located at the bottom of the duplexer body, and a connecting block protrudes from the bottom of the duplexer body. The connecting block is detachably connected to the mounting plate. An installation hole is opened inside the mounting plate near the side, and a drive rod is slidably installed in the installation hole. A drive block is fixed to the portion of the drive rod located deep within the installation hole, and a first spring is installed on the drive block, which is fixedly connected to the inner wall of the installation hole. A pressing block is fixedly connected to the rod body portion of the drive rod located inside the installation hole. A movable block is provided on the sliding path of the pressing block, and a locking rod is fixedly connected to the other side of the movable block. This easy-to-install duplexer eliminates the need for complex professional tools, reducing the difficulty and threshold of installation.

The application discloses a C-band tuning-free duplexer and belongs to the technical field of microwave filters. The tuning-free duplexer comprises an upper conductor and a lower conductor, and the upper conductor and the lower conductor are buckled one above the other to form a waveguide cavity. The upper conductor is provided with a combining port in the middle of the top, and the lower conductor is provided with a low-frequency input / output port and a high-frequency input / output port at the bottom. The waveguide cavity from the low-frequency input / output port to the combining port constitutes a low-end filter, and the waveguide cavity from the high-frequency input / output port to the combining port constitutes a high-end filter. The main bodies of the high-end filter and the low-end filter are both a plurality of waveguide resonant cavities arranged along a straight line, the middle positions of each waveguide resonant cavity are provided with cavity loading, and adjacent waveguide resonant cavities are connected through inter-cavity coupling. The tuning-free duplexer adopts a symmetrical structure and a center loading mode, realizes tuning-free assembly, has the characteristics of high power bearing capacity, low transmission loss and excellent signal isolation, and is suitable for a C-band communication system.

A terminal device and a control method. The terminal device includes a power amplifier, a first circuit, a second circuit, a first antenna, a second antenna, a first frequency division switch, and a second frequency division switch; the first circuit includes N duplexers, and the second circuit includes M duplexers; the first frequency division switch includes N first output terminals, and the second frequency division switch includes M output terminals; the first antenna is connected to the first circuit, and the second antenna is connected to the second circuit; and the power amplifier is configured to access the first circuit to support the first antenna to send a signal, or access the second circuit to support the second antenna to send a signal.

This invention discloses a linear multi-zero cavity duplexer based on a hybrid resonator. The duplexer comprises a rectangular hollow metal cavity, a common signal terminal at the top of the cavity, and two signal branches on either side. The branches employ a hybrid cascaded structure of single-mode and dual-mode metal resonators, forming a linear topology without cross-coupling. The dual-mode metal resonator can operate simultaneously in inter-plate coupling mode and coaxial mode. The resonant mode order is set by pre-setting the internal inter-plate distance, allowing each branch to generate two preset transmission zeros. This invention achieves a six-pole filtering response using only four resonant cavities, forming a dual passband and generating four preset transmission zeros, ensuring high quality factor and high channel isolation while achieving device miniaturization. This invention features a simple structure, easy fabrication, and independently and precisely adjustable coupling parameters, making it suitable for 5G / 6G communication, emergency communication, and UAV-borne high-performance miniaturized RF front-end applications.

A radiofrequency (RF) system may comprise a duplexer or multiplexer, e.g., when the transmitted signal frequency is different from the receiving frequency in a RF communication system, a duplexer may combine the transmitter and the receiver into the same antenna. In other possible RF communication systems, where the transmit (Tx) and receive (Rx) paths utilize the same frequencies (which are duplexed in time domain), a multiplexer may be used to connect different transmitters, receivers and / or transceivers that are using different frequencies, into one common / antenna port. A multiplexer may be used to share an antenna between multiple transceivers at different frequencies. In some embodiments, the multiplexer may be tunable to different frequencies during operation.

A communication device includes a duplexer differentially coupled to a receiver and a transmitter. The duplexer may include phase shifters on the differential lines to provide differential received signals to the receiver and receive differential transmission signals from the transmitter for transmission. For example, the phase shifter are positioned such that single-ended received signals may be converted to differential received signals and convert the differential transmission signals to single-ended transmission signals for transmission. Moreover, the phase shifters may provide the single-ended transmission signals to antennas for transmission and to the differential lines of the receiver for cancellation / isolation. Furthermore, the phase shifters may provide the differential received signals to the receiver for reception and provide the single-ended received signals to the differential lines of the transmitter for cancellation / isolation. Accordingly, the duplexer may convey communication signal while reducing signal interference by providing improved isolation.

A radio frequency module includes a transmit amplifier configured to amplify a transmit signal a receive amplifier configured to amplify a receive signal. The radio frequency module further includes at least one duplexer configured for operation in a frequency division duplex band having a transmit band and a receive band and further configured to filter the transmit signal to pass the transmit band and to filter the receive signal to pass the receive band. The at least one duplexer is coupled to the transmit amplifier via a first node and to the receive amplifier via a second node. A series acoustic resonator directly can be connected to the second node to increase a receive impedance of the at least one duplexer across the transmit band of the at least one duplexer.

The application provides a high-Q bulk acoustic resonator, a filter, a duplexer and a preparation method thereof, and relates to the technical field of bulk acoustic resonators. In the high-Q bulk acoustic resonator, the bottom electrode and the top electrode form a high-low acoustic impedance transverse impedance mismatch structure in the transverse direction, and also form a high-low acoustic impedance longitudinal impedance mismatch structure in the longitudinal direction. The high-Q bulk acoustic resonator aims to solve the problems that the single-protrusion and double-protrusion frame structures have poor inhibition effect on Lamb wave leakage or have greater processing difficulty, ensures simple process and effectively inhibits the leakage of Lamb wave transverse energy, and thus improves the Q value.

The invention provides a bulk acoustic wave resonator, a filter and a duplexer for improving a Q value and a preparation method thereof, and relates to the technical field of bulk acoustic wave resonators. Comprising a substrate, a bottom electrode, a piezoelectric layer and a top electrode which are sequentially stacked in the longitudinal direction, a cavity is formed between the substrate and the bottom electrode, single-protrusion frame structures are arranged between the edges of the two sides of the piezoelectric layer in the transverse direction and the top electrode, and the portions, close to the edges, of the frame structures are arranged in an overhead mode and form an air bridge structure communicated with the outside with the piezoelectric layer. The bulk acoustic wave resonator for improving the Q value aims at solving the problem that an existing single-protrusion and double-protrusion frame structure is poor in Lamb wave leakage suppression effect or large in machining process difficulty, it is guaranteed that the process is simple, Lamb wave transverse energy leakage is effectively suppressed, and therefore the Q value is improved.

The invention relates to a satellite-borne multi-carrier broadband dispersion transmitting link system and a digital pre-distortion compensation method. The system comprises a joint predistortion actuator unit, a JESD204 interface module, an RFSoC module, a multi-carrier transmitting channel, a first multiplexer, a second multiplexer, a high-speed data acquisition module, a soft core computing unit, a refreshing and reconstructing unit, a parameter read-write module and a power amplifier working point control and switch selection module. According to the invention, a joint pre-distortion actuator unit is adopted at a transmitting end to eliminate group delay distortion and imbalance influence in a satellite-borne transmitting link. Meanwhile, on the basis of compensating linear distortion, a GMP model is realized at a transmitting end based on a lookup table structure and is used for compensating the strong nonlinearity and memory characteristics of the power amplifier, and the modeling precision of the satellite power amplifier is improved. According to the invention, the vector amplitude error of the constellation diagram can be improved, the design reserved protection bandwidth between adjacent carriers of the last-stage duplexer can be reduced, and the frequency band utilization rate can be improved.

The application provides a multi-current-path bidirectional SCR device for ESD protection, comprising a P-type substrate, an N-type epitaxial layer, a first P-type buried layer, an N-type buried layer, a second P-type buried layer, a first P-type well region, an N-type well region, a second P-type well region, an anode P+ region, an anode N+ region, a floating N+ region, a cathode N+ region and a cathode P+ region; the application introduces a buried layer structure on the basis of the structure of a conventional bidirectional SCR device for ESD protection, divides the internal current path of the device into a well region current path and a buried layer current path, optimizes the heat distribution in the device, makes the heat distribution of the device more uniform, improves the failure current of the device without increasing the area of the device, increases the performance of the device per unit area, and enhances the anti-electric surge capability of the device.

Aspects herein provide methods and systems for utilizing a Rydberg sensor radio system, implemented as either an active antenna radio system or a passive antenna radio system. In these aspects, receiver portions of the active or passive system are replaced with a Rydberg sensor, which detects a modulated signal corresponding to radio frequency (RF) carrier signals. A laser wavelength in the Rydberg sensor may be selected to correspond to an RF operating frequency, and its orientation can be adjusted to align with a polarization of an arriving electromagnetic field. The Rydberg sensor can extract an in-phase component and a quadrature-phase component of the modulated signal. In active antenna radio system implementations, duplexers and filters can be removed to enable dedicated transmitter and receiver paths, while in passive antenna radio system aspects, the detected modulated signal is provided to the base station via an optical fiber.

The utility model discloses a triplexer filter comprising a housing and a circuit board arranged in the housing, the circuit board is provided with a circuit, and the circuit comprises a first duplexer circuit and a second duplexer circuit; the first duplexer circuit comprises a first input end and two first output ends, the second duplexer circuit comprises a second input end and two second output ends, and the input end of the second duplexer circuit is connected with one output end of the first duplexer circuit. According to the utility model, two groups of duplexer circuits are combined to form a new circuit diagram, the waveform disorder phenomenon is avoided, a matching circuit does not need to be added, and optimization can be completed only by debugging capacitors and inductors. According to the utility model, the number of required components is small, additional component matching circuits are not needed, and the advantages of the duplexer are larger when the passbands of the two duplexer circuits are closer, the frequency requirement is higher and the number of the filter banks is larger.

The utility model relates to the technical field of terahertz radio frequency circuits, solves the technical problems of narrow relative bandwidth and complex processing of a terahertz frequency band waveguide duplexer, and particularly relates to a terahertz multistage coupling type duplexer easy to realize by CNC (computer numerical control). Comprising a duplexer main body structure which is formed by separably combining an E-plane slotted waveguide structural body A and an E-plane slotted waveguide structural body B. The duplexer main body structure is formed by cascading an E-plane Y-type junction with two filters and is provided with an input waveguide, a low-frequency output waveguide and a high-frequency output waveguide. Compared with a traditional T-shaped junction, the T-shaped junction is more suitable for the design of a broadband waveguide duplexer, and the compactness and simplicity of the structure are kept. Actual measurement shows that 24% of total working bandwidth is obtained, and the overall performance of a terahertz communication system is further improved.

In a low-pass filter, attenuation characteristics are improved without increasing the size of the device. The low-pass filter includes a laminate in which a plurality of dielectric layers are stacked in a stacking direction; an antenna terminal, a terminal, and a ground terminal disposed in the laminate; resonators; capacitors; and an adjustment circuit. The resonators are connected to the input terminal. The resonators are connected between the resonators and the output terminal. The capacitors are connected between a connection node between the resonators and the ground terminal. The adjustment circuit adjusts coupling between the resonators. Each resonator is an LC parallel resonant circuit including a capacitor and an inductor having a via extending in the stacking direction. The adjustment circuit includes a via connected at one end to the ground terminal. In a case where the laminate is viewed from above in the stacking direction, the via is disposed along the via in a region between the via of the resonator and the via of the resonator.