17 results about "Microwave power amplifiers" patented technology

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 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 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.

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 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 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 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.

The application discloses a high-efficiency microwave power amplifier design method based on limited harmonic control, which aims at improving the efficiency of the microwave power amplifier by reducing the useless energy of the transistor and increasing the output power of the transistor, and solves the problem of low efficiency of the high-power amplifier.The application takes the power amplifier power distribution mechanism under the limited harmonic condition as the starting point, increases a small amount of second harmonic output energy to reduce more transistor dissipation energy, and makes the voltage waveform fundamental wave and second harmonic out of phase to obtain the maximum fundamental wave component.Meanwhile, the application provides a current waveform which can be used with the above-mentioned voltage waveform, so as to ensure that the fundamental wave / harmonic impedance of the output port is always non-negative, and solves the problem of low efficiency of the high-power amplifier when realizing higher output power.

This invention discloses a high amplitude and phase consistency adaptive adjustment circuit for arrayed power amplifiers, belonging to the field of microwave wireless communication. The circuit includes at least two power amplifiers, a current detection circuit corresponding to each power amplifier, and a programmable gate voltage regulator circuit. A microcontroller forms a closed-loop adjustment circuit. Based on the drain static current fed back from the current detection circuit, the microcontroller adjusts the gate voltage bias output by the programmable gate voltage regulator circuit, stabilizing the drain static current of each power amplifier to a pre-calibrated target value. This circuit supports fixed-step gate voltage adjustment, and the microcontroller can remember control signals after power-down and perform temperature drift dynamic compensation through a pre-stored temperature mapping table. This effectively improves the amplitude and phase consistency and debugging efficiency of the arrayed power amplifier, is compatible with various RF and microwave power amplifiers, and is suitable for arrayed transmission systems.

The invention discloses a near-net forming and batch preparation method of a high-thermal-conductivity diamond / metal matrix composite device with fins, and relates to a composite device and a preparation method thereof. The invention aims to solve the problems that only a diamond / metal-based composite material with a simple shape can be prepared by the existing air pressure infiltration technology, and the diamond / metal-based composite material with a complex shape cannot be demolded, is low in size precision and heat conductivity, cannot be prepared in batches and the like. Through mold design, a mold made of a special material and a demolding method are adopted for design, near-net forming and batch preparation of the high-heat-conductivity diamond / metal-based composite material device which is in a complex shape, has the heat conductivity of 750-1500 W / mK and is provided with the fins are achieved, and the obtained diamond / metal-based composite material device has high and uniform heat conduction performance; the material has high dimensional accuracy and can be directly applied to heat sinks, cooling fins or shells in high-power microwave power amplifier devices or large-scale integrated circuits.

The application belongs to the field of microwave power amplifier control, and particularly relates to a microwave power amplification modulation system based on coupling detection and intelligent shutdown protection, which comprises a preprocessing module, a joint modulation module, a microwave power amplification module, a coupling detection module and a hierarchical protection execution module. The preprocessing module obtains expected load delivery power through convolution coding and constellation mapping; the joint modulation module fuses an improved PID, scene recognition and dynamic decoupling to output a driving amplitude and a drain voltage instruction; the power amplification module is embedded with an impedance matching optimization algorithm to realize efficient amplification of signals; the coupling detection module separates fundamental wave, harmonic wave and stray interference power through joint decomposition, LSTM-CNN feature extraction and deep reinforcement learning; and the hierarchical protection module matches a hierarchical control template based on a power risk model and a knowledge graph. The system realizes power modulation and intelligent shutdown protection in multiple scenes and improves the operation stability of microwave equipment.

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.

A power combiner system includes four microwave solid-state power amplifiers, which are connected in an H configuration by a magic tee device.

The invention belongs to the technical field of microwave integrated circuits, and particularly relates to a multimode broadband microwave power amplifier circuit which comprises a broadband input matching circuit, a reconfigurable inter-stage matching circuit, a reconfigurable output matching network, a first-stage transistor T1 and a second-stage transistor set. Through the arrangement that the reconfigurable inter-stage matching circuit is matched with the reconfigurable output matching network, on one hand, the mode reconfigurable function of broadband and narrowband frequency switching is achieved; on the other hand, the input power of the last-stage transistor in the narrow-band mode is regulated and controlled through the interstage switch tube, the last-stage output impedance is regulated by means of the last-stage switch transistor, and finally the power and efficiency of the narrow-band mode are improved. Switching between an electronic warfare frequency band and a plurality of satellite communication frequency bands can be achieved by adjusting the direct-current control voltage and grid electrode and drain electrode direct-current power supply voltages of the circuit, and the performance of a satellite communication mode under the same frequency band is superior to that of a broadband electronic warfare mode. Besides, mode switching of the two types of frequency bands can be completed only through on-chip voltage switching control, and the switching problem of the high-performance power amplifier between the broadband electronic warfare frequency band and the narrowband communication frequency band is effectively solved.

1. The name of the design product: permanent magnet focusing klystron. 2. The use of the design product: used as microwave power amplifier. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.