24 results about "Microwave amplifiers" patented technology

The invention discloses a 5G microwave amplifier performance test method based on automatic spectrum analysis, and relates to the technical field of data analysis, by introducing a disturbance excitation and recovery behavior comparison mechanism, the short-time dynamic response of an amplifier spectrum is actively induced, the point-by-point difference of a reference spectrum, a disturbed spectrum and a recovery spectrum is analyzed, and the performance of a 5G microwave amplifier is tested. A response-recovery ratio indicator is constructed to identify a local indentation region that is difficult to perceive in the steady-state spectrum. Compared with a traditional method depending on a frequency spectrum smoothing strategy, the method has the advantages that the problem of slight indentation in a high-frequency bandwidth is easy to cover, specific frequency point response is excited through frequency perturbation, power fluctuation or narrow-band interference, and the disturbance response and recovery capability difference of the amplifier become an evaluation basis; therefore, the recognition accuracy of nonlinear response and early failure characteristics is improved, and the stability pre-judgment capability of the 5G amplifier is enhanced.

A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.

This application relates to an integrated filtering and amplification device for quantum computing measurement and control, comprising: a device housing, a circuit board, a front-end attenuation component, a front-end bandpass filter component, a microwave amplification component, a rear-end attenuation component, and a rear-end bandpass filter component. The front-end bandpass filter component, the front-end attenuation component, the microwave amplification component, the rear-end attenuation component, and the rear-end bandpass filter component are sequentially connected to the circuit board and are all integrated within the device housing. By integrating a microwave front-end module with a bandpass filter, attenuator, and microwave amplifier, the complexity of external circuitry is greatly reduced. Furthermore, the integrated front-end module is small in size and can be directly integrated into electronic devices, allowing the measurement and control pulses generated from the electronic devices to be directly connected to the dilution refrigerator, greatly simplifying external wiring and improving system reliability.

A self-excitation microwave sensor suitable for non-destructive testing of metal mesh film, belonging to microwave sensor technology, comprising a resonant sensing structure, a microwave amplifier, a phase shift element, a band-pass filter, a radio frequency detector, a digital-to-analog converter and a microprocessor; wherein the resonant sensing structure, the microwave amplifier, the phase shift element and the band-pass filter form a self-excitation oscillation loop, the resonant sensing structure has a band-pass characteristic, is located in the feedback branch of the loop, the resonant frequency thereof is consistent with the center frequency of the band-pass filter, and the loop gain and the phase shift satisfy the self-excitation oscillation condition at the frequency; by reasonably setting the gain of the microwave amplifier and collecting the self-excitation oscillation signal power in real time, the sensor can realize detection of sub-millimeter width crack damage and identification of high square resistance samples, has high detection sensitivity, compact structure, small volume and low cost, does not need other external microwave analysis instruments, and can be applied to on-site non-destructive testing of metal mesh film.

The application provides a radio frequency microwave amplifier for expanding modulation bandwidth, and relates to the technical field of radio frequency microwave circuits.The amplifier comprises an active device current source end face parasitic capacitor, a first inductor, a first capacitor, a video bandwidth expansion circuit, an output circuit and a target load; the first end of the first inductor is connected with the first end of the active device current source end face parasitic capacitor and the first end of the output circuit respectively, and the second end of the first inductor is connected with the first end of the first capacitor and the first end of the video bandwidth expansion circuit respectively; the second end of the output circuit is connected with the target load; and the second end of the first capacitor is grounded.The application can effectively break through the limitation of traditional radio frequency microwave amplifiers in modulation bandwidth, so that the amplifier can process modulation signals in a wider frequency range, and meet the demand of modern communication systems for high-speed and large-capacity data transmission.

The invention discloses a microwave amplifier output power detection method and device and a medium, and relates to the technical field of microwave detection, and the method comprises the steps: initializing a microwave amplifier and locking working conditions, generating a detection disturbance control sequence and a switching trigger pulse sequence, generating a dual-state mark and executing direction self-checking, and generating a dimension calibration relation; converting the drain current sequence and the temperature sequence through a dimension calibration relation, generating a dual-state mean value sequence, and obtaining a current steady-state threshold value and a temperature steady-state threshold value; constructing a current time window, calculating a dual-state mean value of the current time window, generating a steady-state judgment value, and obtaining a mismatch strength estimator; branch processing is executed, output power is calculated in a steady state, the output power is kept in an unsteady state, and dimension calibration relation updating is executed when a dimension calibration relation updating trigger condition is met, so that double-state response is clear, disturbance can be identified, working point drift is restrained, and transient disturbance of an amplitude stabilization purpose interface and a protection purpose interface is reduced.

A microwave treatment device according to one aspect of the present disclosure includes a heating chamber, a microwave generator, an amplifier, a feeder, a detector, a controller, and a storage. The microwave generator generates a microwave having an arbitrary frequency in a predetermined frequency band. The amplifier amplifies the microwave and outputs the amplified microwave as incident microwave power. The feeder supplies the incident microwave power to the heating chamber. The detector detects the incident microwave power and reflected microwave power that returns from the heating chamber to the feeder. The storage stores the incident microwave power and the reflected microwave power in association with the frequency of the microwave and time elapsed since the start of heating. The controller causes the microwave generator to execute a frequency sweep over the predetermined frequency band.

The invention discloses a high-gain multi-beam planar near-field test method and device, and the method comprises the steps: a measurement and control computer controls a multi-channel vector network analyzer to output signals of different frequency points, the signals are transmitted to a test probe after being amplified by a microwave amplifier, and the signals are radiated into a free space; the high-gain multi-beam antenna receives a radiation signal from a free space, converts the radiation signal into a radio frequency signal, and transmits the radio frequency signal to a corresponding channel of the multi-channel vector network analyzer; the measurement and control computer obtains the amplitude difference and the phase difference between different beam receiving channels of the high-gain multi-beam antenna according to the amplitude and the phase of the signal received by the signal input port of the multi-channel vector network analyzer and the amplitude and the phase of the reference signal. The test efficiency and the test precision are improved.

This invention provides a sensitivity-enhanced temperature measurement device based on an optoelectronic oscillator, comprising: a laser, an intensity modulator, a delay line interferometer, a sensitive arm fiber optic unit located in the space where the signal to be measured is located, a reference arm fiber optic unit, a photodetector, a microwave amplifier, a bandpass filter, a power divider, and a frequency measurement section. The intensity modulator generates an optical signal containing two frequency components: a carrier wave f0 and a first-order single-sideband wave f1. The delay line interferometer then separates these two frequency components, allowing them to propagate separately along the reference arm and sensitive arm fibers. These components are then returned to the delay line interferometer and combined to output an optical signal whose phase contains the temperature signal to be measured. The phase change of the optical signal caused by the temperature signal to be measured is then converted into a frequency change in the microwave signal output by the optoelectronic oscillator. This invention also provides a sensitivity-enhanced temperature measurement method. The device provided by this invention can effectively improve the sensitivity of temperature detection.

The invention discloses a method for predicting the service life of a GaN HEMT device based on a size effect, the power magnitude of a microwave amplifier is continuously increased, and the gate width of the used GaN HEMT device is also continuously increased, so that the research finds that the gate width is in positive correlation with the number of material defects of the GaN HEMT device, that is, the larger the gate width is, the more the number of the material defects of the device is, and the larger the material defects of the device are. Based on the weakest chain theory, the number of material defects of the GaN HEMT device and the failure rate of the GaN HEMT device are in exponential positive correlation; and at a given working temperature, the service life of the GaN HEMT device is reduced along with the increase of the gate width size, so that a GaN HEMT device service life prediction model based on the size effect is provided to reasonably quantify the influence of the size effect on the failure rate and the service life of the GaN HEMT device. And finally, model verification and comparison are carried out based on accelerated life test data of the GaN HEMT devices with three different gate widths, and the result shows that compared with a traditional Arrhenius model, the new life prediction model of the GaN HEMT device based on the size effect is remarkably higher in prediction precision.

The application belongs to the technical field of laser radar, and discloses a kind of ranging and velocity measurement system of frequency-modulated continuous wave laser radar based on optical fiber light splitting multi-view field, after narrow linewidth single-frequency fiber laser emits laser, into electro-optic modulator, waveform generator and microwave amplifier modulate laser carrier wave through electro-optic modulator, and modulated light is amplified by EDFA, and light splitting system is divided into N paths laser, each laser is divided into a local oscillator light and a probe light by beam splitter, probe light is emitted to object by fiber optic circulator and collimator, and the probe light emitted by target is incident to circulator, and then local oscillator light enters coupler to carry out coherent mixing, and intermediate frequency signal is obtained by balanced detector reception, after filtering and sampling, real-time N parallel fast fourier transform is carried out, and the synchronous measurement of N path distance and speed is realized using data acquisition card.The application can expand the field of view angle of laser radar and improve the angular resolution of laser radar based on multi-path distance measurement of laser radar, and overcome the problem of crosstalk.

The application discloses a kind of circuit device and method for ultra-wideband optical signal detection and amplification, belong to photoelectric signal detection and processing technical field, including optical detection conversion unit, for detecting optical signal and the optical signal detected is converted into electrical signal;DC high-frequency separation unit, for separating electrical signal into DC signal and high-frequency signal;Current-voltage conversion and DC voltage amplification unit, for converting DC signal into DC voltage signal and amplifying the DC voltage signal converted;DC drive unit;High-frequency amplification unit, for amplifying high-frequency signal;DC high-frequency combination unit, for the DC voltage signal amplified after current and the amplified high-frequency signal are synthesized and output;High-frequency amplification unit is the radio frequency amplifier or microwave amplifier prepared using gallium arsenide process.It can detect and amplify from DC to 20GHz optical modulation signal.A kind of method for ultra-wideband optical signal detection and amplification is also disclosed.

This invention relates to a core microwave amplifier chip application verification system and method for aerospace applications, belonging to the field of electronic technology. The application verification method and system of this invention combine the inherent characteristics of the device with the requirements of aerospace applications, constructing a complete set of methods and systems for microwave amplifier application verification, which can meet the needs of microwave amplifier aerospace application verification. This invention develops targeted tests for the inherent characteristics, process features, and common failure modes of microwave amplifiers. For example, it designs stability evaluation for amplifier self-excited oscillation, hydrogen resistance evaluation for hydrogen effects, anti-mismatch capability evaluation for power reflection caused by output mismatch, and lifetime assessment for the impact of various operating conditions on lifetime, ensuring the efficiency and relevance of the verification.

The utility model discloses a microwave power amplifier circuit board structure convenient to install, and relates to the technical field of microwave power amplifiers, the microwave power amplifier circuit board structure comprises a microwave amplifier lower shell and a circuit board main body, one side of the circuit board main body is provided with an input interface, and the other side of the circuit board main body is provided with a second output interface. A first output interface is installed on one side of the outer surface of the circuit board body, a supporting frame is fixed among the first output interface, the second output interface and the input interface, and a second buffer pad is connected into the supporting frame. Through the arrangement of the input interface, the first output interface, the second output interface and the supporting frame, the circuit board main body does not need to be fastened in the upper shell and the lower shell of the microwave amplifier through bolts during installation, and only the circuit board main body needs to be placed in the lower shell of the microwave amplifier; the input interface, the first output interface and the second output interface penetrate through the lower shell of the microwave amplifier; and moreover, the structural strength is high, and the stability is good.

The invention discloses a self-oscillation light source and microwave source based on hybrid integration and photoelectric feedback and a working method of the self-oscillation light source and microwave source. According to the device, an erbium-doped silicon nitride gain waveguide and a lithium tantalate electrooptical modulator are heterogeneously integrated on the same chip, and a high-Q-value optical resonant cavity is formed by the device, a single-mode polarization maintaining optical fiber and a reflector of the single-mode polarization maintaining optical fiber through end face coupling; the microwave feedback loop comprises a photoelectric detector, a narrowband frequency-selecting filter, a phase shifter and a microwave amplifier, and the microwave feedback loop and the optical resonant cavity form a photoelectric interlocking closed oscillation ring through a modulator and a detector. During working, the frequency-selecting filter selects a target microwave frequency, the phase shifter is adjusted to enable feedback microwaves to be synchronous with optical pulses in the cavity, and the system realizes self-sustaining oscillation without an external microwave source and outputs optical pulses with stable repetition frequency and microwave signals with low phase noise at the same time. The invention has the advantages of compact structure, high stability and low noise.

The application discloses a key distribution method based on full-optical hiding, which comprises the following steps: generating a sinusoidal microwave signal, processing the sinusoidal microwave signal through a microwave amplifier, modulating the sinusoidal microwave signal into a laser by combining a preset bias current, and outputting the modulated sinusoidal microwave signal in the form of an optical pulse signal; after filtering the optical pulse signal based on an optical filter, sending the optical pulse signal processed by an optical coupler to a receiving end; filtering and suppressing the noise in the received optical pulse signal by the receiving end, extracting the phase information of the filtered and suppressed optical pulse signal, converting the phase difference into an amplitude difference of an electric pulse signal, filtering and analog-digital converting the electric pulse signal, and obtaining a key waveform. The application further discloses a key distribution device based on full-optical hiding, a corresponding equipment and a storage medium. The key distribution method based on full-optical hiding provided by the application can improve the efficiency of key distribution and reduce the risk of key theft.

The invention discloses a reconfigurable metasurface with continuously adjustable phase and multi-stage modulation amplitude, which is composed of a plurality of metasurface units arranged in an array, and each unit comprises two layers of dielectric plates and three layers of metal structures; a first metal layer is arranged on the upper surface of the first dielectric plate, and the metal layer is a square metal patch; the upper surface of the second dielectric plate is a second metal layer which is a metal floor loaded with slot coupling grooves, and a third metal layer on the lower surface of the second dielectric plate comprises a microstrip line network, a path selection circuit composed of PIN diodes, a phase shifter circuit composed of variable capacitance diodes and inductors and an amplifying circuit loaded with a microwave amplifier. According to the invention, polarization conversion 360-degree reflection phase continuous adjustment and multi-stage modulation of amplitude from enhancement to reduction can be realized; the reflection directional diagram and the reflection intensity can be independently adjusted, dynamic regulation and control of scattering characteristics are achieved, and the method has application value in the fields of electromagnetic compatibility, target detection, electromagnetic environment optimization and the like.

The invention provides a radio frequency microwave amplifier for expanding modulation bandwidth, and relates to the technical field of radio frequency microwave circuits. The amplifier comprises an active device current source end face parasitic capacitor, a first inductor, a first capacitor, a video bandwidth expansion circuit, an output circuit and a target load, the first end of the first inductor is connected with the first end of the active device current source end face parasitic capacitor and the first end of the output circuit. The second end of the first inductor is connected with the first end of the first capacitor and the first end of the video bandwidth expansion circuit. The second end of the output circuit is connected with a target load; the second end of the first capacitor is grounded. The radio frequency microwave amplifier can effectively break through the limitation of a traditional radio frequency microwave amplifier on the modulation bandwidth, so that the amplifier can process modulation signals in a wider frequency range, and the requirements of a modern communication system for high-speed and large-capacity data transmission are met.

The invention discloses a superconducting Josephson traveling wave parameter amplifier chip with distributed phase correction and a preparation method, and relates to the technical field of low-temperature microwave amplifier design and manufacturing, and the superconducting Josephson traveling wave parameter amplifier chip comprises an input / output port, an artificial transmission line formed by a superconducting Josephson series array, and an LC resonator unit array distributed along the artificial transmission line. The artificial transmission line is formed by connecting interdigital electrodes and superconductive Josephson junctions in series, wherein the interdigital electrodes are uniformly distributed along the line. The LC resonator unit is composed of a plate capacitor and a plane inductor, a lower electrode of the plate capacitor is divided into two parts, a polar plate of one part is a complete rectangular metal plate, and a polar plate of the other part is of an interdigital structure and is meshed with the interdigital structure of the superconducting Josephson series array artificial transmission line. Non-linear frequency mixing of input signals can be achieved through an artificial transmission line composed of a superconductive Josephson series array, distributed phase correction is provided for signal transmission along the line through interdigital coupling of an LC resonator array and the artificial transmission line, and gain improvement of the device is achieved.

A microwave treatment device comprises: a heating chamber that accommodates an object to be heated; a microwave generator that generates a microwave in a specified frequency band; an amplifier that amplifies the microwave; a feeding unit that supplies the amplified microwave to the heating chamber; a detector that detects a reflected microwave power; and a controller. The controller selects one of plural frequencies in the specified frequency band and causes the microwave generator to generate the microwave with the selected frequency. The controller causes the amplifier to change an output power of the microwave so that the microwave supplied to the heating chamber has one of plural output powers. The controller measures a reflected microwave frequency characteristic based on reflected microwave powers detected under each of a condition that the microwave has a first output power and a condition that the microwave has a second output power.

The application discloses a microwave photon mixer based on optical add-drop filtering and photoelectric oscillation, which comprises a laser, an optical modulation and filtering processing chip, a photoelectric detection unit and a microwave amplifier. The optical modulation and filtering processing chip comprises a first optical coupler, a first phase modulator, a second phase modulator, a narrow-band flat-top optical filter, an optical add-drop filter and a second optical coupler; the photoelectric detection unit comprises a balanced detector and a photoelectric detector. The laser outputs an optical carrier, is connected with the optical modulation and filtering processing chip, and completes radio frequency modulation, local oscillation modulation and sideband selection; the optical add-drop filter is coupled with the photoelectric detector, is then connected with the microwave amplifier, and is then loaded into a radio frequency input port of the second phase modulator to realize photoelectric oscillation and generate a local oscillation signal; the optical signal output by the second optical coupler is coupled with the balanced detector to obtain a required mixed frequency signal. The application does not need an external electrical local oscillation source, simplifies the structure and has the advantage of full integration.

The utility model discloses a test fixture for a microwave amplifier, which belongs to the technical field of microwave amplifier detection, and comprises a detection platform, the top of the detection platform is movably connected with a convenient clamping mechanism, and the inner side of the convenient clamping mechanism is movably connected with a multi-stage buffer mechanism. The inner side of the convenient clamping mechanism is movably connected with an equipment body, a pull rod and a linkage rod are driven by a driving motor, so that a clamping plate conveniently clamps and fixes the microwave amplifier equipment body to be detected, limiting can be easily relieved by reversely rotating the driving motor after detection is finished, the clamping process is simplified, the test preparation and recovery time is effectively shortened, and the test efficiency is improved. During pressure detection, in the downward pressing process of the supporting bottom plate, a telescopic supporting column, a second compression spring, a connecting rod, a component force block, a second tension spring and a third compression spring work cooperatively, pressing thrust is converted into multidirectional elastic potential energy and mechanical work, and the good damping effect is achieved.

The application belongs to the technical field of laser radar, and discloses a parallel linear frequency modulation continuous wave laser radar ranging and velocity measuring system, wherein laser of different wavelengths is emitted by a narrow linewidth single frequency fiber laser array, enters an electro-optic modulator after passing through a wavelength division multiplexer, and laser carrier output after passing through a fiber coupler is modulated by an arbitrary waveform generator and a microwave amplifier through the electro-optic modulator; the modulated light is divided into two beams of light by a beam splitter, one is a local oscillation light, and the other is a detection light; the detection light enters a fiber loop after power amplification by an EDFA amplifier, is emitted to an object after dispersion by a three-prism, and the reflected detection light enters the loop after entering the three-prism, mixes with the local oscillation light to enter a fiber coupler, and the light after the wavelength division multiplexer is obtained by a photoelectric detector to obtain an intermediate frequency signal, and then real-time N-way parallel fast Fourier transform is carried out to realize N-way distance and speed synchronous measurement. The application improves laser radar data acquisition rate and image refresh rate, and expands the field of view angle of the laser radar.

The invention discloses a high-stability tunable photoelectric oscillator based on photon complementary filtering, and belongs to the field of microwave photons. The photoelectric oscillator comprises a main laser module, an optical frequency comb generation module, a microwave photonic band-pass filter, a positive feedback photoelectric resonant cavity module, an optical injection locking module and an electric injection locking module. According to the invention, by utilizing the complementary characteristic of optical filtering at the transmission end and the downloading end of the same resonant ring, the optical carrier in the microwave photonic filter and the central angular frequency difference of the band-stop optical filter are locked, so that the angular frequency difference between the optical carrier and the band-stop optical filter is fixed, the influence of temperature on the central frequency of the MPF is eliminated, and the MPF performance is improved. MPF output passes through a microwave amplifier, a second electric power divider and a third electric power divider to form a positive feedback photoelectric resonant cavity, and then photoelectric oscillator output is locked through an electric injection locking technology, so that the output frequency stability of the OEO is improved.