45 results about "Microwave power amplifiers" patented technology

The invention discloses an open-circuit compensation type bias circuit, which belongs to the technical field of solid-state microwave power amplifiers and comprises a bias line, an open-circuit compensation line, a first transmission line and a second transmission line. One end of the first transmission line, one end of the open circuit compensation line, one end of the bias line and one end of the second transmission line are connected; the other end of the first transmission line is a first microwave port, the other end of the open circuit compensation line is suspended, the other end of the bias line is a power port, and the other end of the second transmission line is a second microwave port; the physical length of the bias line and the physical length of the open-circuit compensation line meet the relational expression that the sum of the physical length of the bias line and the physical length of the open-circuit compensation line is equal to the sum of four of the central wavelength of the working frequency band of the power amplifier. Through the combination of the transmission line, the compensation line and the bias line, the parasitic inductance of the bias circuit is reduced, and compared with an existing bias circuit, the parasitic inductance is reduced by more than 1 / 4.

The invention discloses a multi-mode ultra-wideband continuously adjustable microwave power amplifier circuit, and belongs to the technical field of microwave integrated circuits. Switching between the ultra wide band and multiple communication frequency bands can be realized by adjusting the control voltage and the drain electrode power supply circuit of the pre-stage circuit, and the center frequency of the communication frequency bands can be independently designed. And the center frequency of the communication frequency band can be changed by changing the values of the capacitor and the inductor in the continuous adjustable branch knot and the inductor in the drain power supply circuit of the pre-stage circuit. Through on-chip voltage and external voltage switching control, mode switching of the ultra wide band and multiple communication frequency bands can be realized, and the problems that the ultra wide band and the communication frequency bands of the high-performance power amplifier can be switched and the communication frequency is continuously adjustable are solved.

The invention provides a radio frequency microwave power amplifier over-standing wave protection system and a protection method thereof. The system comprises a bidirectional coupling module, a dual-path detection module, a signal processing module and a protection execution module, wherein the bidirectional coupling module is used for collecting a forward radio frequency power analog signal and a reverse radio frequency power analog signal; the dual-path detection module is used for generating a forward detection voltage analog signal based on the forward radio frequency power analog signal and generating a reverse detection voltage analog signal based on the reverse radio frequency power analog signal; the signal processing module is used for generating an actual standing-wave ratio based on the forward detection voltage analog signal and the reverse detection voltage analog signal, and generating a control protection signal according to the actual standing-wave ratio; and the protection execution module is used for performing power-off protection on the to-be-protected radio frequency microwave power amplifier based on the control protection signal. The problem that an existing radio frequency microwave power amplifier over standing wave protection scheme cannot be suitable for complex application scenes can be solved.

The invention discloses a low-slow small aircraft target reconnaissance and interference integrated device, and the device comprises a plurality of receiving and transmitting antennas which are used for obtaining a collection signal, and transmitting an interference signal after the signal amplification; the high-power switches are connected with the transceiving antennas in a one-to-one correspondence manner and are used for switching received and transmitted signals; the microwave transceiving unit is connected with the high-power switch and is used for acquiring the acquired signal and filtering the acquired signal; the signal processing unit is connected with the microwave transceiving unit and is used for processing the filtered acquisition signal to obtain a target signal and a trigger interference signal and transmitting the target signal and the trigger interference signal to the microwave transceiving unit; and the microwave power amplifier is connected with the microwave transceiving unit and the high-power switch and is used for amplifying the interference signal. Through the scheme, the device has the advantages of simple structure, high sensitivity, accuracy, reliability and the like, and has very high practical value and popularization value in the technical field of reconnaissance interference.

The present invention relates to a control method for a microwave power amplifier of an unmanned aerial vehicle, wherein signals of different types and intensities are sequentially transmitted to the unmanned aerial vehicle, and the signal detection module of the unmanned aerial vehicle identifies the type and intensity of the received signal and assigns different gains; the microwave power amplifier performs signal amplification, and the execution system performs corresponding actions according to the received signal; various data of the unmanned aerial vehicle test flight time period are obtained, and the gain data corresponding to the unmanned aerial vehicle execution action state meeting the specified requirements are extracted; training data samples are constructed and input into a gain prediction model for training; received signals are collected in real time and input into a gain prediction model for gain prediction; corresponding gain amplification processing is performed on the received signals; the state of the unmanned aerial vehicle execution action is monitored in real time, and fed back to the gain prediction model, and the parameters of the gain prediction model are optimized. Different amplification processing of signals of different types and intensities is realized, signal quality is enhanced, and signal stability and reliability are improved.

Embodiments disclosed herein may include a method for impedance match tuning. In an embodiment, the method includes setting a pin depth of a pin inserted into a hole in a dielectric resonator antenna (DRA) to adjust an input impedance of the DRA to match a load impedance of the DRA at a resonant frequency of the DRA. In an embodiment, the method further includes tuning a frequency of a microwave power amplifier that is electrically coupled to the microwave frequency to match the resonant frequency of the DRA. In an embodiment, the method further includes converting the load impedance of the DRA to a characteristic impedance of a coaxial transmission line with an impedance transformer, wherein the impedance transformer is electrically coupled between the microwave power amplifier and the DRA.

The present invention provides a high-energy microwave frozen soil fragmentation system, which includes a microwave source. The output of the microwave source is connected to a multi-channel microwave power amplifier, and the microwave phase of the microwave power amplifier is adjustable. The output of each microwave power amplifier is connected to a straight waveguide through a radio frequency cable. The straight waveguides are arranged in an array and fixed downward on the microwave radiation device assembly. The present invention can realize the function of synchronous adjustment of microwave phase through phase programming, achieve efficient focusing of microwaves inside the frozen soil with adjustable depth, and can efficiently fragment the frozen soil; it can meet the heating requirements for fragmenting the structure of high-hard frozen soil, which is beneficial to the effect of efficiently fragmenting the frozen soil; it is convenient to realize the adjustment of the up-down and fast-slow speeds of the system, greatly improving the mobility of the microwave radiation front.

The present invention provides an ammunition information setting system based on microwave energy harvesting, which includes a host computer and a terminal on the projectile, and also includes a setting device and a receiver. The setting device includes a setting control circuit, a transmitting antenna, and a microwave power amplifier. The receiver includes a receiving control circuit, an energy conversion circuit, and a receiving antenna. The host computer is signal-connected to the setting control circuit. The setting control circuit is electrically connected to the microwave power amplifier and the transmitting antenna in sequence. The transmitting antenna is used to emit microwave energy. The receiving antenna is used to receive microwave energy. The energy conversion circuit converts the received microwave energy into electrical energy. The receiving control circuit demodulates the received microwave energy for communication and sets the communication demodulation result to the terminal on the projectile.

The invention discloses a method for repairing a microwave power amplifier module, which belongs to the field of microelectronic module repairing methods and comprises the following steps of: 1, removing a cover to process the module and visually inspecting internal faults; step 2, positioning a fault point through electrical characteristic test, including detection of gain, flatness and power indexes; step 3, carrying out plasma cleaning on the module; 4, replacing a damaged chip or adjusting circuit parameters to repair a fault; step 5, performing circuit function preliminary test on the repaired module; sixthly, conducting internal visual inspection on the states of welding spots and components; step 7, sealing a cover and finishing tin soldering operation; and step 8, self-checking the quality of the welding surface and the cleanliness of the cavity after sealing the cover. According to the method, the problems of low repair precision, poor process compatibility and high cost in the prior art are solved through a standardized process, and the module repair efficiency and reliability are improved.

The utility model discloses a kind of microwave power amplifiers for 5G communication, it is related to 5G communication equipment technical field, to solve the technical problem that current installation angle is inconvenient to adjust, leading to microwave power amplifier cannot be in optimum working state under complex environment, including bottom plate, the top of the bottom plate is fixedly installed with two bearing seats, two the bearing seat between fixedly connected with microwave power amplifier main body, the top of the bottom plate one side is fixedly installed with the adjusting assembly of driving bearing seat rotation, the middle part of each the bearing seat is fixedly provided with the connecting rod for and microwave power amplifier main body connection, the utility model is connected by setting adjusting assembly, rotating adjusting screw can drive rack to move, rack and gear meshing drive bearing seat and microwave power amplifier main body rotation, realize multi-angle adjustment, with in different complex environment Flexible adjustment installation angle, easy to operate, the advantage that structure is stable.

The application provides a replaceable stacked beacon solid-state power amplifier device, which comprises a primary power module, a secondary power module and a microwave power amplifier module, the three modules are connected through an adapter socket and are stacked and assembled, the primary power module comprises an EMI filter circuit, a DC / DC conversion circuit and a relay control circuit, which are used for converting a bus voltage into gate and drain voltages required by a power amplifier tube, the secondary power module comprises a negative voltage protection circuit, a surge suppression circuit, a voltage distribution circuit, a telemetry acquisition circuit and an automatic gain control circuit, wherein the voltage converted by the primary power module is provided to each component in the microwave power amplifier module through the voltage distribution circuit, the device disclosed by the application divides the function of the beacon solid-state power amplifier into general independent modules, and has the characteristics of strong replaceability and strong universality.

Provided is a 10W power amplifier for Ka band. The power amplifier includes, a drive amplifier; an intermediate stage amplifier composed of two transistors; a final stage amplifier composed of 4 transistors; a GCPW, waveguide, and a first spatial combiner unit which are sequentially connected between the drive amplifier and the intermediate stage amplifier to divide a signal output from the drive amplifier and provide the divided signal to the intermediate stage amplifier; a second spatial combiner unit, a waveguide divider, and a third spatial combiner unit which are sequentially connected between the intermediate stage amplifier and the final stage amplifier to divide signals output from the intermediate stage amplifier and provide the divided signals to the final stage amplifier; and a fourth spatial combiner unit and a waveguide combiner which are sequentially connected to the output terminal of the final stage amplifier to combine signals output from the final stage amplifier and finally output the combined signals.

The present invention discloses a pulse power multiplier type microwave power amplifier, which includes a pre-stage amplification matching circuit, a final-stage transistor, a bias circuit, a matching circuit, and a time delay circuit. The pre-stage amplification matching circuit, the final-stage transistor, the matching circuit, and the time delay circuit are connected in sequence along the microwave signal transmission direction. The matching circuit provides matching between the final-stage transistor and the time delay circuit, and the time delay circuit has a time delay effect on the signal with a step of one pulse period. When adjacent k pulse signals pass through the time delay circuit, time delays with a decreasing period of one cycle are sequentially generated, so that the peaks of consecutive k pulses are superimposed at the output end, and a saturated output power k times the original is output. Different saturated output powers are output when k takes different values. The present invention has the characteristics of high saturated output power and adjustable saturated output power, which helps to reduce the complexity and volume of components and is worthy of promotion in the industry.

The application discloses a power amplifier without impedance detection and belongs to the technical field of microwave power amplifiers. The power amplifier comprises a power amplifier module, a mismatched impedance correction network module and a circularly polarized radio frequency antenna module. The power amplifier is used for amplifying a power signal. The multi-port mismatched impedance correction network is used for correcting mismatched impedance under a certain mismatched amplitude to a certain fixed impedance, so that the purpose of resisting mismatch is achieved. The radio frequency antenna is used for transmitting the radio frequency power signal to a radio frequency space through the antenna. The application can complete impedance correction without a feedback impedance calculation network. The application can complete mismatched impedance correction of any phase, and the performance loss is only related to VSWR and the correction effect is excellent.

The application discloses a low-energy-consumption microwave-assisted prefabricated brick rapid curing device, which comprises a heating curing box, a heat exchange recovery mechanism and a low-energy-consumption microwave generator, low-energy-consumption microwave generators are arranged at the two ends of the outer side of the heating curing box, the low-energy-consumption microwave generator adopts a high-efficiency solid-state microwave power amplifier, a heating cavity is arranged in the heating curing box, a heat-conducting corrugated metal sheet is arranged on the top wall of the heating cavity, and heat gathering grooves are arranged on the top of the heating curing box. The low-energy-consumption microwave-assisted prefabricated brick rapid curing device uses the heating cavity of the heating curing box as a prefabricated brick curing space, uses the low-energy-consumption microwave generator as a core component for generating microwave energy, and transmits the microwave energy generated by the low-energy-consumption microwave generator into the heating cavity under the guidance of the inner side waveguide metal pipe, radiates the microwave energy into the heating cavity, and performs microwave curing on the prefabricated bricks on the inner side.

A microwave power amplifier arrangement for an electron paramagnetic resonance (EPR) system provides amplified microwave pulses having a microwave frequency in the X-band. The arrangement has a microwave input and a microwave output, and comprises at least one transistor amplifier device, and at least one switchable reflection device. A respective transistor amplifier device comprises a transistor amplifier device input directly or indirectly connected to the microwave input (2), at least one transistor, and a transistor amplifier device output directly or indirectly connected to the microwave output. A respective switchable reflection device comprises a PIN diode and a lambda / 4 line connected directly or indirectly to the transistor amplifier device output of at least one transistor amplifier device and to a first port of the PIN diode, with lambda being the wavelength of the microwave radiation within the lambda / 4 line. A second port of the PIN diode is connected to ground.

The invention discloses a microwave transmission system for NV color center magnetic detection and a transmission method thereof, the microwave transmission system for NV color center magnetic detection comprises a microwave generator, a microwave power amplifier, a circulator, an impedance matching adjusting device, a microwave antenna and a 50-ohm terminal load, the microwave power amplifier is connected with the microwave generator through a coaxial cable; the circulator is connected with the output end of the microwave power amplifier; the microwave antenna is connected with the output end of the impedance matching network and used for radiating microwave energy to the NV color center in the blind hole of the diamond anvil cell. The 0.1 mm micro electric small loop antenna is matched with the diamond anvil cell blind hole, the L-shaped LC network is adopted to match the antenna impedance from 0.056 + j3.5 ohm to 50 ohm, microwave reflection is remarkably reduced, the ODMR spectrogram contrast ratio and symmetry are improved, and the magnetic field analysis precision reaches the order of magnitude. A protection mechanism formed by the circulator and the 50-ohm load isolates reflected signals, equipment damage is avoided, it is guaranteed that the system stably operates at the frequency band of 2.4-3.3 GHz, and core hardware support is provided for high-voltage magnetic detection.

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 invention discloses a small-sized integrated broadband power amplifier circuit, an amplifier device and a fault detection method, which are applied to the technical field of microwave power amplifiers and aim to solve the problem that in the prior art, a broadband power amplifier module, a power supply module and a heat dissipation device are generally designed respectively. In the field use process, the system is spliced through a connecting line or a transition plate, the size is large, the cost is high, the power consumption is large, the debugging amount is large, the transfer process is inconvenient, meanwhile, when a fault occurs, a fault part cannot be quickly positioned, and personnel have the risk of radiation when troubleshooting the fault for a long time. According to the invention, through a radio frequency link series circuit, the pushing stage module and the amplification stage module are connected in series and automatically spliced under the extremely small size, so that the optimal connection of the two power amplification circuits is ensured; and power, temperature, voltage and user information are monitored through an internal control center, so that the stability and reliability of the system are improved, and the debugging and maintenance difficulty is reduced.

A dual-input microwave power amplifier (PA) with high-efficiency. The PA exploits the continuum of modes between the Doherty and Chireix PA mode of operation to achieve 40% fractional bandwidth while relying on the physical linear dispersion of the transmission lines of the lossless output combiner. A constant output is achieved at peak power over the entire bandwidth. The output backoff varies from 6 dB in the Doherty mode to 8 dB in the Chireix mode. The PA operates over a wider range of frequencies from 1 to 8 GHz. The dual-input PA operates in mixed-mode and thus requires variable input power drives and outphasing angle.

The application discloses a broadband microwave solid-state power amplifier design method based on a reconfigurable matching network, and belongs to the technical field of microwave power amplifier design. The method acquires transistor model parameters and a target working frequency band, constructs an initial topology of a reconfigurable matching network containing tunable element nodes and switch switching paths, performs discretization sampling on the target frequency band to obtain a plurality of key frequency points, dynamically adjusts element values and switch on-off states for each key frequency point through an iterative search algorithm to generate a corresponding power matching parameter set, compares the power matching parameter sets of adjacent key frequency points in terms of difference degree, identifies parameter jump intervals with a difference degree exceeding a tolerance threshold, positions mismatch element nodes according to the parameter jump intervals, performs a switch path reconstruction operation, and generates a broadband matching parameter sequence. The application can effectively solve the performance deterioration problem of a broadband power amplifier matching network caused by parameter mutation when working across frequency bands.

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 application discloses a dual-mode microwave power amplifier circuit for electronic warfare and communication systems and belongs to the technical field of microwave integrated circuits. The dual-mode microwave power amplifier circuit comprises an ultra-wideband front-stage amplification circuit and an ultra-wideband rear-stage amplification circuit. The ultra-wideband front-stage amplification circuit amplifies input signals and adjusts gate voltages. The rear-stage amplification circuit further amplifies output signals of the front stage and outputs the signals. Both the two-stage amplification circuits can switch between ultra-wideband and single communication frequency bands through reconfigurable branches. The switching can be realized by adjusting control voltages. Moreover, the center frequency of the single passband can be changed by changing the values of capacitors and inductors in the reconfigurable branches. The mode switching between the ultra-wideband and the communication frequency band can be realized through on-chip voltage control. The performance is maintained well before and after the switching, and the problem of dual-mode operation of high-performance power amplifiers in the ultra-wideband and the communication frequency band is solved.

The present invention provides a method for testing the electromagnetic pulse radiation interference characteristics of a MEMS microsensor, comprising: selecting an L-band microwave power amplifier-filter circuit based on an RF MEMS filter as a test circuit sample; establishing a space electronic coupling characteristics test system; the space electronic coupling characteristics test system comprising a microwave radiation antenna, a nanosecond pulse drive power supply, a first receiving antenna, a second receiving antenna, an oscilloscope disposed within a shielded room, a radio frequency signal generator, and the test circuit sample; determining test parameters, including the type and parameters of the nanosecond pulse drive power supply, a test frequency band, a test frequency point, antenna distance, and the relative orientation of the test circuit sample to the propagation direction of the electromagnetic wave in space; and performing an electromagnetic interference test based on the space electronic coupling characteristics test system and the test parameters. This invention can provide technical support for ensuring the safe and reliable operation of micro-nano systems in power systems.

The invention discloses a solid-state power amplifier test and synthesis system, a test method and a consistency adjustment method. The system comprises a solid-state power amplifier module, a signal link module, a measurement and control module and a temperature monitoring module, the solid-state power amplifier module comprises a microwave driving module and a microwave power amplifier module; the signal link module comprises a wave-to-same converter and a waveguide directional coupler; wherein the waveguide converter is used for converting a microwave signal from the microwave power amplifier module into a waveguide signal for transmission; the waveguide directional coupler is used for coupling waveguide signals and transmitting coupled signals to the measurement and control module; the measurement and control module is used for sending a test signal to the microwave driving module, collecting a coupling signal of the waveguide directional coupler, and performing data processing and analysis based on the test signal and the coupling signal; the temperature monitoring module is used for monitoring the temperature of a power amplifier component area of the microwave power amplifier module. According to the invention, the safety, efficiency and consistency of testing and synthesis of the high-power solid-state power amplifier can be improved.

The invention discloses an electronic probe micro-discharge detection system and method, and the system comprises a signal source, a modulation unit, a microwave power amplifier, a bi-directional coupler, a vacuum tank and a coupler which are sequentially arranged. The coupler is connected with a high-power matching load and a first spectrum analyzer. For whether the electronic probe micro-discharge detection system can sensitively detect electronic changes, rated electrons can be generated by controlling the wavelength and energy distribution of a UV light source, controlling hardware use through an aperture, irradiating the UV light source to a metal plate through a silica optical fiber and setting the voltage and the aperture of the light source; the current calibration test system is used for testing rated electrons in advance; the method for confirming the optimal detection current position of the electronic probe is provided, different tested pieces adopt different testing positions, and the technical problem that in the prior art, local testing cannot be carried out, and the current change generated when part local micro-discharge is generated cannot be reflected is solved.

The application relates to the field of communication, in particular to a constant-power or constant-gain mode switchable power amplifier control circuit, which comprises an amplification link and an adjusting circuit; the amplification link comprises a preamplification stage, a signal attenuator, a driving amplification stage, a final-stage power amplifier and a signal coupler which are sequentially connected from a signal input end to a signal output end; the adjusting circuit is used for sending a gain adjusting signal to the signal attenuator and maintaining the stability of the amplification link; the application solves the problems that microwave power amplifier equipment needs to be switched in different constant-power or constant-gain working modes, the equipment power amplifier enters a deep saturation working state, the signal quality deteriorates, the reliability of the equipment is reduced and the service life is shortened; the application facilitates the user to switch the working mode in different use scenes, protects the output signal quality of the equipment power amplifier from deterioration, improves the reliability of the equipment and prolongs the service life.

In some aspects, the embodiments described herein relate to a method for tuning a frequency of microwave power delivered to a chamber, including striking a plasma in the chamber. Embodiments may further comprise scanning the frequency from a first frequency to a second frequency, where a set point frequency in a range from the first frequency to the second frequency has a lowest reflected power. In an embodiment, the method further includes setting the frequency of the microwave power delivered to the chamber to the set point frequency. The method may further include changing the set point frequency when a measure of reflected power exceeds a threshold.

The utility model provides a multi-path microwave power amplifier. The multi-path microwave power amplifier comprises a power supply and a control protection circuit module, the radio frequency link module is electrically connected with the power supply and control protection circuit module so as to supply power to the radio frequency link module; wherein the working frequency bands of the first power amplifier branch and the first isolator are A frequency bands, and the working frequency bands of the second power amplifier branch and the second isolator are B frequency bands; the power amplifier further comprises a third power amplifier branch, the third power amplifier branch comprises a third temperature compensation and equalization circuit, a third amplifier unit and a pilot frequency power division circuit which are in communication connection in sequence, the pilot frequency power division circuit is provided with two output ends, and the two output ends of the pilot frequency power division circuit are in communication connection with the first isolator and the second isolator respectively. According to the invention, power amplification can be carried out on microwaves of multiple wavebands at the same time, and multi-band signals after power amplification are output.

The invention provides a rapid and uniform rewarming microwave heating system and heating method for large-scale organs after long-time low-temperature preservation, and relates to the technical field of low-temperature biological preservation, the system is characterized in that microwave energy is input into a resonant cavity through a coupler, and a heated object in the resonant cavity is heated; the spectrum analyzer is used for monitoring the forward microwave power of the coupler and a reflected microwave signal in the resonant cavity, and sending the monitored forward microwave power and reflected microwave signal to the control unit; and the control unit is used for dynamically adjusting the output power and / or the output frequency of the microwave power amplifier based on the preset heating temperature curve and the real-time feedback data until the temperature of the heated object reaches the set temperature. According to the heating system and the heating method provided by the invention, the temperatures inside and outside the organ are uniform in the rewarming process of the organ by using microwave heating, so that the rewarming time of the organ is shortened, and the damage to the organ in the rewarming process is also reduced.