220 results about "Diplexer" patented technology

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 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 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 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.

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.

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.

Apparatus and methods are disclosed. The small cell apparatus includes a port to interface with a coaxial cable, the coaxial cable configured to transmit a signal from a radio unit (RU); an impedance matching component configured to sufficiently match the signal; a diplexer configured to separate the signal into a separated signal; a signal converter configured to increase and / or decrease the separated signal to an emission signal at an emission frequency; a transceiver node configured to map the emission signal to two or more multiple-input multiple-output (MIMO) layers; and an antenna configured to transmit the two or more MIMO layers.

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.

A radio frequency front-end circuit includes a first diplexer, an extractor, and a second diplexer. First diplexer is coupled to an antenna for receiving a radio frequency signal and configured to separate radio frequency signal into a first signal within low, mid and high bands of a wireless wide area network and a second signal within an ultra-high band of WWAN. Extractor is coupled to first diplexer. Extractor includes two band pass filters and a band rejection filter. Two band pass filters are configured to extract two global navigation system signals within two global navigation system bands from first signal. Band rejection filter is configured to allow a third signal within the mid and high bands of WWAN in first signal to pass. Second diplexer is coupled to first diplexer and extractor and configured to combine second and third signals into a WWAN signal.

Diplexers and multiplexers for carrier aggregation are disclosed. In one aspect, a front end for receiving carrier aggregation radio frequency signals includes an antenna switch module configured to receive a first radio frequency signal in a first band and a second radio frequency signal in a second band from an antenna, and a diplexer including a first filter configured to pass the first band, a second filter configured to pass the second band, and a diplexed node between the first and second filters and coupled to the antenna switch module. The front end can further include a main amplifier coupled to the diplexed node of the diplexer and configured to amplify radio frequency signals received from the diplexer, and a transconductance stage coupled to the main amplifier and configured to independently control the gain of the main amplifier for the first band and the second band.

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.

An electronic device, according to one embodiment, comprises: a main portion; a communication portion; an intermediary portion comprising a frequency filter and a diplexer; a first connection unit connecting the intermediary portion and the main portion; a second connection unit connecting the communication portion and the intermediary portion; and at least one first antenna, wherein the frequency filter is connected between the first antenna and the diplexer, and the diplexer may be connected to each of the frequency filter, the first connection unit, and the second connection unit.

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.

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.

An electronic device is provided. The electronic device includes an antenna, a wireless communication circuit, and a diplexer. The diplexer includes a first port, and second and third ports connected to the wireless communication circuit, a low pass filter (LPF) configured to filter an RF signal of a low frequency band from a signal received from one of the first port and the second port and output same to the other one of the first port and the second port, and a high pass filter (HPF) configured to filter an RF signal of a high frequency band from a signal received from one of the first port and the third port and output same to the other one of the first port and the third port.

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.