333 results about "Diplexer" patented technology

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 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 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.

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.

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.

A system for a waveguide-based diplexer (wavelength multiplexer / demultiplexer) and polarizer having ultra-broad bandwidth, a compact footprint, low losses, fabrication robustness and a simple single etch fabrication process. The polarizer (TE-pass) is based on the phase-matched coupling of the unwanted TM0 mode in an input waveguide to the TM1 mode in a tapered directional coupler (DC), which is then guided through a low-loss bend (180-degree) and scattered in a terminator section with low back reflections. An S-bend is added before the output for filtering any residual TM0mode present in the input waveguide. The diplexer is based on a multimode interference (MMI) coupler and is designed at the first imaging length for 1550 nm wavelength resulting in a compact MMI length. In order to improve the extinction ratio, the output ports are made asymmetric in width.

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.

A frequency selector for superconducting parametric amplifiers. According to illustrative embodiments, a frequency selector system for superconducting parametric amplifiers may comprise a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency, a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency, and an inverse diplexer electrically connected to the resonator for separating the signal frequency and the idler frequency. In some embodiments, a frequency selector system for superconducting parametric amplifiers, comprising a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency; a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency; and a multiplexer electrically connected to the resonator for separating the signal frequency and the idler frequency.

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 provides a three-mode dielectric resonator which comprises a dielectric block, the dielectric block is provided with a pair of first resonant blind holes, a pair of second resonant blind holes and a third resonant blind hole, the first resonant blind holes are arranged along a first diagonal direction of the dielectric block and used for forming a first resonant mode, and the second resonant blind holes are arranged along a second diagonal direction of the dielectric block and used for forming a third resonant mode. The pair of second resonance blind holes are arranged along a second diagonal direction of the dielectric block and are used for forming a second resonance mode, the third resonance blind holes are used for forming a third resonance mode, and the first diagonal direction and the second diagonal direction intersect with each other. The invention also provides a dielectric waveguide filter and a dielectric waveguide duplexer using the resonator unit. When the resonator unit is used for designing a dielectric waveguide filter, a three-mode waveguide structure with independently adjustable resonant modes is realized, multiple resonant modes are realized under the same volume, the overall Q value benefit is achieved, and the resonator unit has the advantages of miniaturization and high Q value benefit.

The invention discloses a communication antenna and a communication system, and belongs to the technical field of antennas. The communication antenna comprises a plurality of improved PIFA antenna units, and each antenna unit is arranged on the same plane grounding plate in a circumferential array mode. Besides, the feed phases of the four units are set to be equal-amplitude excitation which is lagged by 90 degrees in sequence, so that radiation fields of the four units are subjected to vector synthesis in a far-field space, and left-hand circularly polarized waves are formed. The communication antenna has the advantages of being low in cost, low in profile, light in weight, easy to process and good in broadband circular polarization performance, and meanwhile a high-performance PA, a low-noise LNA and a duplexer with high isolation and high suppression degree are adopted in a communication system circuit. Therefore, the whole system is excellent in transmitting power, receiving sensitivity and anti-interference capability, and high-quality and uninterrupted satellite communication in a vehicle-mounted environment is ensured.

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.

The invention relates to a multi-antenna WIFI (Wireless Fidelity) module without a duplexer. The multi-antenna WIFI module without the duplexer comprises a substrate, a Bluetooth unit, a first wireless unit and a second wireless unit, the Bluetooth unit is arranged on the substrate; the first wireless unit is located on one side of the Bluetooth unit, the first wireless unit comprises a first radio frequency circuit and a second radio frequency circuit, the first radio frequency circuit and the second radio frequency circuit are both arranged on the substrate, and an interval is arranged between the first radio frequency circuit and the second radio frequency circuit; the second wireless unit is located on one side of the Bluetooth unit, the second wireless unit comprises a third radio frequency circuit and a fourth radio frequency circuit, the third radio frequency circuit and the fourth radio frequency circuit are both arranged on the substrate, and a gap is formed between the third radio frequency circuit and the fourth radio frequency circuit. According to the scheme provided by the invention, a duplexer can be abandoned, so that the circuit design is simplified, and the design cost is reduced.

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.

The present invention relates to the field of circulator technology, in particular to the field of IPC H04B, and more specifically to a method for manufacturing a ceramic composite silicon-based circulator and its application. The present invention obtains a ceramic composite silicon-based circulator by cutting through eight steps: deep silicon etching through holes, making ferrite discs, preparing composite substrates, making dielectric bridges, photolithography patterns, vacuum coating, photoresist stripping, and scribing and slicing. The present invention adopts a silicon wafer commonly used in semiconductor technology, embeds a ferrite ceramic disc in the middle of each silicon wafer through hole, connects them into a completed circuit substrate substrate through a specific adhesive material, and then manufactures a microstrip circulator through a semiconductor thin film process. Dielectric bridge metallization technology is used at the connection between the two materials to ensure the continuity and reliability of the circuit connection. The circulator has a wide operating frequency band, high power resistance, good consistency, easy integration, and low cost. It is very suitable for use in isolators, duplexers, reflection amplifiers and other fields.

The invention relates to a surface acoustic wave resonance device, a filter, and a duplexer or multiplexer. The surface acoustic wave resonance device includes: a piezoelectric layer; the at least two resonance units are arranged on the surface of the piezoelectric layer, each resonance unit comprises an interdigital electrode and reflection structures located on the two sides of the interdigital electrode in the propagation direction of the surface acoustic wave, and the at least two resonance units are connected in parallel; and the phases of the surface acoustic wave signals corresponding to the at least two resonance units are the same. In the embodiment of the invention, the at least two resonance units are connected in parallel, and the phases of the corresponding surface acoustic wave signals are the same, so that the transverse wave modes of different resonance units can be mutually suppressed, and the transverse wave suppression effect of the surface acoustic wave resonance device is improved.

Apparatus and methods are disclosed. The apparatus includes a port to interface with a coaxial cable, the coaxial cable configured to transmit a signal; an impedance matching component configured to sufficiently match the signal; a diplexer configured to separate the signal into a separated signal; an RF analog to digital converter that is configured to convert the digital, separated signal into an analog signal; a numerically controlled oscillator (NCO) connected to a frequency translation block (FTB), wherein the FTB comprises a frequency selector module that is configured to translate the analog signal into four separated paths and configured to convert the frequency of each of the separated paths based on a modem center frequency to a frequency selected signal; and a modem configured to transmit the frequency selected signal to one or more user equipment.

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.

The invention relates to the technical field of nondestructive testing, in particular to an electromagnetic ultrasonic testing system. The electromagnetic ultrasonic detection system comprises an excitation generation circuit, an electromagnetic ultrasonic transducer, a detection circuit and a duplexer, the excitation generation circuit is used for generating an excitation signal and outputting a target level signal, and the electromagnetic ultrasonic transducer is electrically connected with the excitation generation circuit. The ultrasonic transducer is used for being placed on a to-be-detected welding seam block, responding to the excitation signal and applying an alternating magnetic field to the to-be-detected welding seam block, receiving an ultrasonic signal excited by the to-be-detected welding seam block under the action of the alternating magnetic field, and detecting whether the to-be-detected welding seam block has a welding seam defect or not according to the ultrasonic signal; the duplexer is electrically connected with the excitation generation circuit, the electromagnetic ultrasonic transducer and the detection circuit and used for responding to the target level signal to prevent the excitation signal from entering the detection circuit and controlling the ultrasonic signal to be transmitted to the detection circuit from the electromagnetic ultrasonic transducer. According to the embodiment, weld defect detection can be automatically carried out on the to-be-detected weld block, and the detection efficiency is improved.

The utility model discloses a high-pass and low-pass duplexer with a pure copper sheet structure, and belongs to the field of filters. A high-pass and low-pass duplexer with a pure copper sheet structure comprises a shell and a cavity arranged on the shell and further comprises a common end input connector, a low end output connector and a high end output connector which are all arranged on the outer wall of the shell. The common end input connector, the low end output connector and the high end output connector are connected with an input core rod, a low end output core rod and a high end output core rod respectively. The high-low pass copper sheet is arranged in the cavity, and the input core rod, the low-end output core rod and the high-end output core rod are arranged at one end in the cavity and correspond to the high-low pass copper sheet; according to the utility model, the disadvantage that strong coupling is difficult to realize in the design of a broadband combiner is solved, a relatively wide passband can be realized, and the design is relatively easy to control product indexes, free of tuning, small in size and high in consistency; and the processing consistency and the cost are relatively low, and the control is easy.

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.