55 results about "Microwave amplifiers" patented technology

The embodiment of the invention provides a system for measuring a plane vector magnetic field, and the system comprises an optical path module which is provided with a laser, an optical fiber circulator, a long-pass optical filter and a photoelectric detector, a microwave module which is provided with a microwave source, a microwave amplifier and a microwave isolator, a signal processing module which is provided with a lock-in amplifier, and a magnetic generation device. The integration table device comprises a diamond NV color center sensor, a microwave antenna and two pairs of magnetic flux concentrators; during working, laser emitted by the laser device is output to the optical fiber circulator and then enters the diamond NV color center sensor so as to excite the diamond NV color center, and meanwhile, modulated microwaves which are output by the microwave source, are linearly amplified by the microwave amplifier and are transmitted again by the microwave isolator are used for regulating and controlling the electron spin state of the diamond NV color center so as to excite the diamond NV color center. The diamond NV color center outputs fluorescence with microwave regulation and control, and the fluorescence carries information of a plane vector magnetic field. The system can realize a high-isolation and high-sensitivity plane vector magnetic field measurement method.

The invention discloses a verification test system and method adaptive to multi-type amplifier board cards, the system comprises a general test module, a test board card containing an amplifier, a control board card, a microwave signal source, a measuring instrument and a control computer, and a signal transfer center is arranged between a microwave signal excitation measuring device and the test board card; the method comprises the following steps: selecting or customizing a test board card according to a tested amplifier, configuring test parameters, then automatically calling corresponding test programs and parameters to carry out a verification test, and finally generating a test report; functional modules of power supply, signal excitation, signal measurement, control machine parameter acquisition and the like required by performance verification tests of different amplifier board cards are decomposed into a plurality of universal modules, so that the problems of high cost, long time, low efficiency and the like caused by development of special systems for verification tests of different microwave amplifiers are solved.

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.

The present invention discloses a fast adaptive filtering circuit device, belonging to the field of electronics, which includes a main branch and a coupling branch; the main branch includes a limiter, a microwave filter, a coupler, a microwave amplifier A, a main branch filtering network and a microwave amplifier B; the coupling branch includes a coupling branch filtering network and a detection circuit; the coupling branch filtering network is located between the main branch coupler and the detection circuit to realize signal screening for the radio frequency signal in the coupling branch; the detection circuit is located after the coupling branch filtering network, receives the strong signal output identified by the coupling branch filtering network, converts it into a detection voltage, compares it with the set external threshold voltage, issues a control signal, and distributes the control signal to the main branch filtering network in the main branch for filtering channel selection. The present invention can achieve fast suppression of strong interference signals, effectively improve the reception ability of narrow pulse signals, and further enhance the adaptability of ultra-wideband receivers to complex environments.

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.

An embodiment of the present invention discloses a method and system for controlling a microwave amplifier, including the following steps: S1: The microwave amplifier receives a microwave signal from a signal source and sends the microwave signal into a microwave amplification link for power amplification; S2: During the power amplification process, the output signals of each stage of the amplification circuit included in the microwave amplifier are collected, noise reduction processing is performed on each stage of the output signal, each stage of the output signal is analyzed, the real-time power gain of each stage of the amplification circuit is calculated, and the driving power supply level of each stage of the amplification circuit is adjusted according to the real-time power gain of each stage of the amplification circuit; S3: During the power amplification process, the real-time working temperature of different regions of the microwave amplifier is collected, and according to the real-time working temperature of different regions, the heat dissipation intensity of the radiator connected to the microwave amplifier is controlled until the real-time working temperature of the microwave amplifier returns to a preset temperature; S4: The microwave signal after power amplification is fed back to the signal source.

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.

The invention discloses a fast self-adaptive filter circuit device, which belongs to the field of electronics and comprises a main branch and a coupling branch. The main branch comprises an amplitude limiter, a microwave filter, a coupler, a microwave amplifier A, a main branch filter network and a microwave amplifier B; the coupling branch comprises a coupling branch filter network and a detection circuit; the coupling branch filter network is located between the main branch coupler and the detection circuit and is used for screening radio frequency signals in the coupling branch; and the detection circuit is positioned behind the coupling branch filter network, receives the strong signal identified by the coupling branch filter network, outputs the strong signal, converts the strong signal into a detection voltage, compares the detection voltage with a set external threshold voltage, issues a control signal, and distributes the control signal to the main branch filter network in the main branch for filter channel selection. According to the invention, rapid suppression of strong interference signals can be realized, the narrow pulse signal receiving capability is effectively improved, and the adaptability of an ultra-wideband receiver to a complex environment is further improved.

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.

Embodiments of the microwave amplification system are described. In an embodiment, a microwave amplification system includes a microwave amplifier that contains a paramagnetic material with an impurity. The impurity has a plurality of nuclear spin and electron spin-based energy levels. The system includes an input to receive a pumping signal which is transmitted to the microwave amplifier to cause a population inversion in the impurity and excite it to one of the nuclear spin and electron spin-based energy levels. The system further includes another input to receive an input signal to be amplified by the microwave amplifier, the input signal having a lower power than the pumping signal. Once transmitted to the microwave amplifier, the input signal is amplified by the excited state of the impurity in the microwave amplifier thereby generating an amplified signal.

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.

An electric field probe including a power detector to convert an amplitude of the of an electric field into an analog voltage, a voltage controlled oscillator (VCO) creating a frequency modulated (FM) signal corresponding to an electric field based on the analog voltage, and a microwave amplifier to amplify the FM signal.

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.

A system for adjusting bias power provided to a radio-frequency amplifier to increase plurality of figures of merit based on sensed characteristics of the amplifier and / or characteristics of the input or output power.

The invention discloses a stability test management method and system for a microwave power amplifier, and relates to the field of stability testing of microwave power amplifiers, and the method comprises the steps: constructing an S parameter collection environment; analyzing the influence of different environments on the S parameter, and establishing a microwave amplifier adjustment feasibility scheme; setting a scheme for testing the stability of different types of microwave amplifiers according to the stability testing requirements of the microwave amplifiers; screening the most suitable microwave amplifier adjustment feasibility scheme and microwave amplifier stability test scheme; and a man-machine interaction platform is established and used for inquiring the microwave amplifier adjustment feasibility scheme and the microwave amplifier stability test scheme and displaying and recording related information of the microwave amplifier stability test. The microwave amplifier stability testing system has the advantages that the testing efficiency is effectively improved, the testing mode and testing result analysis of microwave amplifier stability testing are inquired through the man-machine interaction platform, and the testing intelligence and convenience are greatly improved.

The present invention discloses an artificial localized surface plasmon active oscillation sensor, which includes an artificial localized surface plasmon resonator, a microwave amplifier, a coupler, and an auxiliary capacitance-resistance matching circuit. The artificial localized surface plasmon resonator serves as the filtering network of the active oscillator and forms a loop with the microwave amplifier, thereby converting the resonance frequency of the passive artificial localized surface plasmon resonator into the frequency of the active oscillation signal and outputting it from the coupler. The active oscillation sensor of the present invention realizes high-precision sensing of the surface dielectric environment based on the high-quality factor and high-sensitivity resonance of the artificial localized surface plasmon, and realizes the active output of the sensing signal.

The invention discloses a microwave photon mixer based on optical add-drop filtering and photoelectric oscillation. The microwave photon mixer comprises a laser, an optical modulation and filtering processing chip, a photoelectric detection unit and a microwave amplifier. Wherein 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 are arranged in the optical modulation and filtering processing chip; the photoelectric detection unit comprises a balance detector and a photoelectric detector. The laser outputs optical carriers and is connected with the optical modulation and filtering processing chip to complete radio frequency modulation, local oscillation modulation and sideband selection; wherein the straight-through end of the optical add-drop filter is coupled with the photoelectric detector, then is connected with the microwave amplifier, and then is loaded to the radio frequency input port of the second phase modulator, so that photoelectric oscillation is realized, and a local oscillation signal is generated; and an optical signal output by the second optical coupler is coupled with the balance detector to obtain a required frequency mixing signal. According to the design, an external electric local oscillator source is not needed, the structure is simplified, and the advantage of full integration is achieved.

The invention particularly relates to a high-power dual-mode solid-state microwave amplifier which is characterized in that a control and pulse modulator is used for generating pulse signals with different widths, amplitudes and frequencies according to external control signals and outputting the pulse signals to a microwave power amplification link; and the microwave power amplification link is used for switching accessed links according to the external control signal and the pulse signal, and amplifying the input microwave small signal so as to output microwave signals with different duty ratios, peak powers and pulse widths. The device can be used for a phased array microwave weapon integrating detection, guidance and striking functions, and has the capability of outputting pulse waveforms meeting different functional requirements.

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 utility model belongs to the technical field of power amplifiers, and particularly relates to a water-cooling test fixture for a microwave power amplifier, which comprises a bottom plate, frame plates are connected to the bottom plate in an ancient way, a mounting plate is hinged between the frame plates, two sliding rods are connected to the mounting plate in a sliding manner, two fixing rods are fixedly connected to the top ends of the sliding rods, and the fixing rods are connected with the bottom plate in a sliding manner. Two vertical rods are slidably connected to the top of the sliding rod, the cross rod penetrates through the vertical rods, an adjusting groove is formed in one side of each vertical rod, and an upper clamping rod is slidably connected to the inner wall of each adjusting groove; the distance between the sliding rods can be adjusted according to microwave amplifiers of different sizes, meanwhile, the vertical rods slide on the sliding rods, lines and pipeline connection positions at the two ends of the different microwave amplifiers can be staggered, and therefore a worker can conveniently conduct water-cooling connection testing work on the microwave power amplifier through the device, and the testing efficiency is improved. And the connection of a line or a water cooling pipeline is prevented from being influenced when different types of microwave power amplifiers are tested and the like.

The present invention discloses a dynamic allocation test system and method for radio frequency resources, which relates to the field of product measurement and control, and is used to improve the utilization rate of test resources and the applicability to different test tasks. The present invention connects the radio frequency signal source on the production line to each workstation via a first optoelectronic link, and each workstation is connected to a spectrum analyzer via a second optoelectronic link. An industrial computer manages the test tasks of each workstation, and a resource control component controls the opening and closing of the relevant first optoelectronic link and the second optoelectronic link according to the test resources required for the test task. The industrial computer calculates the insertion loss value of the attenuator and the compensation gain of the microwave amplifier of the signal receiving terminal based on the tolerance of the test task to the test deviation. The present invention greatly improves the utilization rate of test resources, reduces human resource consumption, and has universal applicability to different test tasks.

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 invention discloses a key distribution method based on all-optical hiding. The method comprises the following steps: generating a sine microwave signal, processing the sine microwave signal through a microwave amplifier, modulating the sine microwave signal into a laser by combining a preset bias current, and outputting the modulated sine microwave signal in the form of an optical pulse signal; after the optical pulse signal is filtered based on the optical filter, the optical pulse signal processed by the optical coupler is sent to a receiving end; and a receiving end filters and suppresses noise in the received optical pulse signal, extracts phase information of the filtered and suppressed optical pulse signal, converts a phase difference into an amplitude difference of an electric pulse signal, and performs filtering and analog-to-digital conversion on the electric pulse signal to obtain a key waveform. The invention further discloses a key distribution device based on all-optical hiding, corresponding equipment and a storage medium. According to the key distribution method based on all-optical hiding, the key distribution efficiency can be improved, and the risk that the key is stolen is reduced.