446 results about "Duplexer" patented technology

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 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.

The utility model relates to the technical field of duplexer protection structures, and discloses a radio frequency duplexer connection protection structure which is applied to a duplexer body, a lower fixed protection bin is fixed below the right side of the duplexer body, and abutting columns are elastically installed on the front portion and the rear portion of the interior of the right side of the lower fixed protection bin. Clamping grooves are formed in the front portion and the rear portion of the interior of the right side of the lower fixed protection bin, an upper movable protection bin used for being sealed with the lower fixed protection bin is hinged to the right side of the duplexer body, the upper movable protection bin is in extrusion fit with the abutting column, and elastic clamping pieces are fixed to the positions, matched with the clamping grooves, of the upper movable protection bin. And the elastic clamping piece is clamped in the clamping groove, so that the joint of the duplexer body and the connecting line can be better protected through the cooperation of the lower fixed protection bin and the upper movable protection bin, and meanwhile, the stability of the joint of the duplexer body and the connecting line in use is improved.

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 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.

The invention discloses a high-stability GaN bidirectional device which comprises a substrate and a transition layer, a buffer layer, a back barrier layer, a channel layer and a barrier layer which are sequentially stacked on the substrate, a first grid electrode and a second grid electrode are prepared on a first hole injection layer and a second hole injection layer respectively, and the first hole injection layer and the second hole injection layer are located on the barrier layer; the first source electrode and the second source electrode are prepared on the barrier layer in an ohmic contact mode and located on the two sides of the first hole injection layer and the second hole injection layer; the first source electrode, the first hole injection layer, the second hole injection layer and the second source electrode are isolated from one another through passivation layers; from the angle of energy band, the valence band top of the back barrier layer is lower than the valence band top of the channel layer, so that the hole is prevented from being injected into the substrate. The device has the functions of bidirectional conduction and bidirectional voltage resistance, can effectively inhibit a current collapse effect caused by a surface trap and a substrate effect, and has high dynamic stability and low dynamic conduction resistance; the substrate can be connected with any source electrode and can also be electrically suspended so as to improve the breakdown voltage of the device.

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.

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.

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 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.

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.

An electrical balance duplexer (EBD) is provided in an example comprising a first transformer comprising a first at least part of a transformer winding and a second at least part of a transformer winding and a second transformer comprising a third at least part of a transformer winding and a fourth at least part of a transformer winding, wherein the first at least part of a transformer winding is connected in series with the third at least part of a transformer winding. The EBD also comprises a first amplifier having an output connected to the first at least part of a transformer winding and / or the third at least part of a transformer winding, and a second amplifier having an input connected to a node between the second at least part of a transformer winding and the fourth at least part of a transformer winding. The second at least part of a transformer winding is connected in series with the fourth at least part of a transformer winding between a first antenna node and a second antenna node, wherein the first antenna node is for connection to a first antenna and the second antenna node is for connection to a second antenna.

The present application provides a transceiver, a remote radio unit, and a base station. The suppression degree of a first transmitting filter and a second transmitting filter in a third receiving working frequency band can be reduced; moreover, the structure is simple, and the sizes of a quadplexer and a duplexer are small, thereby reducing the manufacturing and assembly difficulty of the transceiver, and reducing the cost. The transceiver comprises a first transmitting module, a second transmitting module, a quadplexer, a duplexer and a combiner. The first transmitting module is connected to the quadplexer, the second transmitting module is connected to the duplexer, and the quadplexer and the duplexer are both connected to the combiner. The first transmitting module is used for transmitting a first transmit radio frequency signal to the quadplexer. The second transmitting module is used for transmitting a second transmit radio frequency signal to the duplexer. The quadplexer is used for transmitting the first transmit radio frequency signal to the combiner. The duplexer is used for transmitting the second transmit radio frequency signal to the combiner. The combiner is used for outputting the first transmit radio frequency signal and / or the second transmit radio frequency signal.

The invention relates to the technical field of wireless communication, and discloses a low orbit satellite communication K / Ka frequency band broadband dual circularly polarized antenna. According to the technical scheme, the antenna is characterized by comprising a radiation port surface, a resonant cavity, a dual-circular polarizer, a quasi-TEM transmission air cavity layer, a left polarization broadband feed network layer, a right polarization broadband feed network layer, a TEM mode conversion terminal, a polarization switch, a transceiving duplexer, a first standard waveguide port layer and a second standard waveguide port layer. The antenna is simple in structure, has a self-packaging characteristic, is good in electromagnetic compatibility, and can achieve the high gain, wide bandwidth and high circular polarization purity of the antenna. The shielding air cavity is formed by structure stacking and the metalized through holes, and when a plurality of circuits are integrated together, mutual interference is small, the structure is compact, assembling is convenient, and electrical performance is excellent.

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 provides a transceiver, a remote radio unit and a base station, which not only can reduce the suppression degree of a first transmitting filter and a second transmitting filter in a third receiving working frequency band, but also is simple in structure, and the size of a quadruplexer and the size of a duplexer are relatively small, so that the manufacturing and assembling difficulty of the transceiver is small, and the cost is low. The transceiver comprises a first transmitting module, a second transmitting module, a quadruplexer, a duplexer and a combiner. The first transmitting module is connected with the quadplexer, the second transmitting module is connected with the duplexer, and the quadplexer and the duplexer are both connected with the combiner. The first transmitting module is used for transmitting the first transmitting radio frequency signal to the quadplexer. And the second transmitting module is used for transmitting the second transmitting radio frequency signal to the duplexer. The quadplexer is used for transmitting the first emission radio frequency signal to the combiner. The duplexer is used for transmitting the second emission radio frequency signal to the combiner. The combiner is used for outputting the first transmission radio frequency signal and / or the second transmission radio frequency signal.

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 relates to the technical field of signal detection, and discloses a passive intermodulation signal detection system and method.The system comprises a digital-to-analog converter, a connecting position, an analog-to-digital converter, a cross-correlation operation module and a duplexer, the digital-to-analog converter is arranged at the signal upstream of the connecting position, and the analog-to-digital converter is arranged at the signal downstream of the connecting position; the duplexer is arranged at the signal downstream of the digital-to-analog converter and the signal upstream of the analog-to-digital converter, the joint is electrically connected with the duplexer, and the cross-correlation operation module is electrically connected with the signal upstream of the digital-to-analog converter and the signal downstream of the analog-to-digital converter respectively. The problems of low detection accuracy and the like in the prior art are solved.

The invention discloses a miniaturized and low-delay multi-communication-link fusion radio frequency circuit, which comprises five communication links of LORA / NBIOT / GNSS / WIFI / BLE, and the communication links with different physical characteristics are respectively constructed by corresponding amplification circuits, radio frequency switching circuits, filtering isolation circuits and multi-frequency transceiving antennas. The fusion of multiple communication links adopts two architecture modes of a power amplifier, a switch module and an antenna and a power amplifier, a switch module, a filter, a duplexer and an antenna. Compared with the prior art, the method has the advantages that fusion transmission of multiple communication systems can be achieved, the simplified physical channel building mode can effectively avoid multi-dimensional communication conflicts, network time delay is reduced, and higher system capacity and spectrum utilization efficiency are obtained.