23 results about "Active Phased Array Radar" patented technology

The invention relates to the field of phased radars, and discloses an active phased array radar calibration method, which is used for improving the accuracy of actually measured phase data. Comprising the following steps: calculating theoretical excitation phases of radiation units according to an antenna array physical geometric structure and a target beam directional angle; enabling the antenna to sequentially excite the radiation units and collect coupling signals in a single-channel mode, and performing analysis to obtain an actually measured amplitude, a phase and a phase deviation; synthesizing the theoretical excitation phase and the phase deviation to generate an actual emission phase, and constructing a phase compensation lookup table; and after compensation by using the lookup table, measuring the actual directional diagram, and if not, performing fine adjustment. The calibration precision and reliability are improved, and the high-precision detection requirement of the active phased array radar can be met.

The invention belongs to the technical field of radar data processing, and particularly relates to a multi-subarray radar anti-interference azimuth super-resolution method and device. The method comprises the following steps: S1, obtaining a sub-array level target echo signal S with interference after radar preprocessing, and filtering interference in echo through an adaptive interference suppression matrix to obtain a filtered echo signal y; s2, uniformly dispersing an airspace steering vector of the echo signal y into L angles in a main lobe range to obtain an observation matrix A formed by a group of base vectors; s3, constructing an underdetermined equation set y = Ax, and solving a vector x by using a complex homotopy algorithm; and S4, determining the orientation of the target according to the relationship between the value of the element in the vector x and the threshold value. According to the invention, the target detection and resolution capability of the multi-subarray active phased array radar in an interference environment is improved.

The invention belongs to the technical field of radars, and discloses a Ku-band integrated wide-angle scanning active phased array radar module which comprises a plurality of dielectric substrates and a plurality of copper-clad printing layers which are stacked at intervals, a TR chip and various circuit elements are arranged on the outermost layer, and the Ku-band integrated wide-angle scanning active phased array radar module integrates the functions of radiation, control, power supply and radio frequency feed. According to the function of the copper-clad printing layer, the antenna is divided into an antenna radiation layer, a digital control layer, a power supply layer, a control power supply multiplexing layer, a feed network layer and a ground layer. The three layers are respectively used for forming a high-gain wide-angle scanning array wave beam, modulating amplitude, modulating phase, controlling transceiving channel switching, supplying power, transmitting and distributing equal-power radio-frequency signals and shielding electromagnetic influence between adjacent copper-clad printing layers; the radar module provided by the invention is realized in a compact array space in which the array unit spacing is less than 0.5 wavelength, the 3dB scanning range of a pitching plane can at least reach + / -63 degrees, the 3dB scanning range of an azimuth plane can at least reach 55 degrees, and each unit has good performance.

The application discloses a radar subarray testing device, a frame assembly and a use method. The radar subarray testing device comprises a bottom beam frame, a testing rack capable of being adjusted forward and backward and left and right is arranged on the bottom beam frame, a frame assembly capable of carrying a subarray is arranged on the testing rack, the frame assembly comprises a group plate displacement member capable of being correspondingly adjusted and a demarcated testing frame assembly arranged on the group plate displacement member, the radar subarray testing device use method comprises leveling, loading a subarray to be detected, moving and adjusting a position, connecting line testing and fine adjustment recording. The application can detect the power and phase frequency performances of single or multiple groups of subarray components of a large active phased array radar in a short time, and after the position of the subarray is adjusted on the testing device, the actual fine adjustment requirement can be met through the matched frame assembly, and the application is suitable for popularization and use in radar subarray performance testing.

This application provides an active phased array radar detection method and system based on SDR. By acquiring historical spectrum data, it uses HMM / particle filtering to predict the next-hop frequency band and generate a pre-interference template. The fast channel transmits directionally in the predicted sub-band according to the template, while the slow channel performs system identification, protocol analysis, DOA and micro-Doppler analysis, and backfills waveforms and beams. For multiple targets, a three-dimensional joint scheduling system of "time slot-frequency band-beam" is constructed, allocating frequencies according to threat level and inherently constraining frequency bands / sectors, power, sidelobes, etc. The system includes an antenna array, SDR, prediction, parallel processing, scheduling, threat assessment, compliance management, and an industrial control computer, achieving low-latency, accurate, and compliant suppression of fast frequency hopping and concurrent targets.

The invention provides an SDR-based active phased array radar detection method and system, and the method comprises the steps: collecting a historical frequency spectrum, predicting a next-hop frequency band through HMM / particle filtering, and generating a pre-interference template; the fast channel performs directional emission in a prediction sub-band according to a template, and the slow channel completes system identification, protocol analysis, DOA and micro Doppler and backfills waveforms and wave beams; time slot-frequency band-wave beam three-dimensional joint scheduling is constructed in a multi-target mode, and constraints such as protection frequency bands / sectors, power and sidelobes are distributed and generated according to threat levels. The system comprises an antenna array, an SDR, prediction, parallel processing, scheduling, threat assessment, compliance management and an industrial personal computer, and realizes low-delay, accurate and compliance suppression of fast frequency hopping and a concurrent target.

The invention discloses an active phased array radar system for a low-altitude unmanned aerial vehicle, particularly relates to the field of unmanned aerial vehicles, and comprises a system initialization module, a beam forming calibration module, a received signal noise reduction module, a signal separation and extraction module, a target accurate positioning module, a system parameter optimization module, a data encryption transmission module and a fault monitoring and early warning module. The system initialization module is used for starting an active phased array radar system for initialization, configuring core parameters and establishing a three-dimensional target detection coordinate system; a receiving antenna receives a target reflection signal and amplifies the target reflection signal through a low noise amplifier, an ADC acquisition module executes adaptive noise cancellation and noise reduction processing, and analog-to-digital conversion is carried out on the noise reduction signal to obtain a digital signal sequence; according to the method, the beam pointing precision and gain are remarkably improved, accurate coverage of a low-altitude unmanned aerial vehicle target is ensured, and the azimuth precision of target detection is improved.

The invention belongs to the field of electronic equipment structure design simulation and artificial intelligence, and particularly relates to a physical field stability prediction method based on PINN-WL, and the method comprises the steps: 1, constructing a neural network model; 2, fusing the physical mechanism as a regularization item into a loss function of the neural network model to form a mechanism model part of the loss function, and enabling the loss function to comprise the mechanism model part and a data driving model part of the device; 3, training the neural network model, and minimizing the loss function by using a gradient descent optimization algorithm so as to search and obtain an optimal parameter; according to the method, the physical field stability prediction model based on PINN-WL is established, so that the problem of poor stability of physical field simulation in the structural design of the active phased array radar is solved, and the simulation precision and efficiency can be ensured.

This invention discloses an active phased array radar system, relating to the field of radar technology. The system includes an antenna element, a transceiver module (TR), a transceiver processing unit, and a wave control unit. The TR element integrates a feed network and a sum / difference network. The sum / difference network includes a broadband sum / difference device composed of four 180° stripline bridges: the sum and difference ports of the first bridge serve as the sum and elevation difference ports of the sum / difference device, respectively; the two equally spaced arm ports of the first bridge are connected to the sum ports of the second and third bridges, respectively; the equally spaced arm ports of the second and third bridges serve as the four quadrant ports; the difference ports of the second and third bridges are connected to the two equally spaced arm ports of the fourth bridge; and the sum port of the fourth bridge serves as the azimuth difference port of the sum / difference device. This invention completely solves the problem of integrating metal waveguide sum / difference devices with tile-type radar antennas.

The application discloses an active phased array system radar cognitive jamming signal generation method, medium and equipment, relates to the field of radar electronic countermeasure technology, and mainly comprises the following steps: constructing a radar electronic countermeasure simulation model, obtaining a signal pattern state conversion table by using a TOPSIS sorting algorithm and a minimum jamming signal ratio data table; obtaining an interference pattern selection model by using the signal pattern state conversion table and a DDQN network according to the radar electronic countermeasure simulation model; and performing optimal interference pattern decision by using the interference pattern selection model. The active phased array system radar cognitive jamming signal generation method, medium and equipment can improve the precision and applicability of radar jamming decision.

The application discloses a kind of high-efficiency circuit and control strategy for controlling input current constant when pulse power output, the circuit includes DC power supply, staggered parallel Boost circuit and LLC resonant circuit in phase series;The driving signal of the parallel two branches of staggered parallel Boost circuit is 180 ° complementary and inductance current works in critical continuous mode with partial negative current;The primary side of LLC resonant circuit is half-bridge structure, and the secondary side is full-wave rectification, and the driving of upper and lower switch tubes on the primary side half-bridge is fixed operating frequency.The circuit of the application can be applied to output pulse power occasions such as active phased array radar, pulse electrochemical wastewater, etc., the output load is constant amplitude pulse power, the output voltage of energy storage capacitor decreases in the time with pulse power, the output voltage of energy storage capacitor rises in the time without load, the input current of circuit is kept constant in the whole cycle time, which is conducive to the reliability improvement of power supply DC power supply and the improvement of overall conversion efficiency.

The invention discloses an active phased array radar system, and relates to the technical field of radars. The system comprises an antenna unit, a TR assembly, a transmit-receive processing unit and a wave control unit. A feed network and a sum-difference network are integrated in the TR assembly. The sum-difference network comprises a broadband sum-difference device formed by arraying four 180-degree strip line bridges, a sum port and a difference port of a first bridge are respectively used as a sum port and a pitch difference port of the sum-difference device, and two equally divided arm ports of the first bridge are respectively connected to sum ports of a second bridge and a third bridge. Equally-divided arm ports of the second bridge and the third bridge are respectively used as four quadrant ports, difference ports of the second bridge and the third bridge are respectively connected to two equally-divided arm ports of the fourth bridge, and a sum port of the fourth bridge is used as an azimuth difference port of the sum-difference device. According to the invention, the problem that the metal waveguide sum-difference device is difficult to integrate with the tile-type radar antenna is thoroughly solved.

The application relates to the technical field of radar signal processing, and discloses a multi-channel anti-interference angle super-resolution method based on a blocking matrix, which comprises the following steps: interference covariance matrices in radar echo data are extracted, eigenvalue decomposition is carried out, interference spatial feature vectors are extracted, and interference suppression blocking matrices are calculated; then, target echoes after interference suppression based on the blocking matrices are calculated; finally, an angle super-resolution steering vector set reconstructed by the interference suppression blocking matrix is calculated, and an IAA algorithm is used to solve and realize angle super-resolution in an interference environment. In the application, the blocking matrix is used to suppress interference while retaining spatial degrees of freedom, and on this basis, the IAA algorithm is used to realize angle super-resolution of main lobe echoes, so that the angle super-resolution problem in an interference environment can be effectively solved, and the sea target detection capability of a multi-channel active phased array radar in a complex interference and dense target environment can be greatly improved.

The application belongs to the technical field of outfield detection of aircraft airborne active phased array radars, and particularly relates to an outfield detection device for an aircraft airborne active phased array radar, which is convenient to carry, can be flexibly applied in an outfield, and can independently call and intercommunicate data when each function module executes a test task, so as to cooperatively complete radar data unloading, analysis, and antenna and power supply fault diagnosis and positioning functions. The outfield detection device can realize in-situ function detection, performance detection, radar data unloading and analysis, and antenna and power supply fault diagnosis and positioning functions of the airborne active phased array radar by using fewer external resources, is fast and efficient, can accurately position faults of an antenna assembly and a power supply unit of the airborne active phased array radar, and provides strong technical support for outfield antenna and power supply maintenance support.

The invention belongs to the technical field of building external thermal insulation quality detection, and discloses a building external thermal insulation quality detection method and system based on an active phased array radar, and the method comprises the steps: generating a three-dimensional scanning image, and carrying out the feature extraction of the three-dimensional scanning image, and obtaining quality feature data; key factors influencing the external thermal insulation quality of the building are identified; and predicting the change trend of the building external thermal insulation quality under different environmental conditions by using the defect prediction model, and adjusting a production process and a maintenance strategy based on the change trend so as to optimize the construction quality. According to the method, the key factors influencing the external thermal insulation quality of the building can be efficiently and accurately identified, so that the quality of the thermal insulation layer can be comprehensively evaluated, potential defects can be identified, and suggestions for optimizing construction and maintenance strategies are provided.

The invention provides a fully-polarized active phased array radar and a signal processing method, and belongs to the technical field of radar signal processing, and the radar comprises a cross dual-polarized antenna array, a dual-polarized transmitting channel, a dual-polarized receiving channel, a beam forming and synthesizing module and a signal processing control module. The dual-polarization transmitting channel is used for generating and outputting two paths of radio-frequency transmitting signals with orthogonal polarization modes and adjustable phase difference between the two paths of radio-frequency transmitting signals; the dual-polarization receiving channel is used for receiving and processing dual-polarization echo signals from the cross dual-polarization antenna array; the beam forming and synthesizing module is used for performing spatial domain beam forming and polarization synthesizing processing on the dual-polarization echo signal; and the signal processing control module is used for sending a control instruction to the dual-polarization transmitting channel, receiving a polarization synthesis signal from the beam forming and synthesis module and carrying out target detection and identification. According to the invention, the overall detection performance, the anti-interference capability and the target identification accuracy of the radar in a complex electromagnetic environment are improved.

The invention discloses an air traffic police aircraft, and relates to the technical field of unmanned aerial vehicles, the air traffic police aircraft comprises a main body structure, the main body structure comprises a cabin, one side of the bottom of the cabin is fixedly connected with a phased array radar, the bottom of the cabin is provided with a storage bin, the bottom of the storage bin is provided with a panoramic camera, and the top of the panoramic camera is provided with a protection part; one side of the panoramic camera is provided with a frequency spectrum monitoring device and is fixedly connected with the cabin, one side of the frequency spectrum monitoring device is provided with an ADS-B receiver and is fixedly connected with the cabin, and the top of the cabin is fixedly connected with a multi-band relay radio station; and a folding assembly; an active phased array radar, a panoramic camera, frequency spectrum monitoring equipment and an ADS-B / 1090ES receiver are integrated through a main body structure, target legality is cooperatively captured and discriminated, electromagnetic interference is avoided through intelligent skin, an emergency air base station is built through a multi-band relay radio station, and therefore monitoring precision and scene adaptability are improved.

The invention discloses a continuous rolling steel material size real-time measurement system and method based on an active phased array radar. The system utilizes the characteristics of strong penetrability of the millimeter wave radar and agile AESA wave beam, overcomes the influence of severe environment, and realizes the non-contact tracking measurement of the high-speed moving steel material. Through an innovative grading signal processing framework, precision requirements of different rolling stages are intelligently matched, finally, high-reliability and full-process real-time size feedback is provided for an automatic control system of the rolling mill, the size precision and production stability of continuous rolling products are remarkably improved, and basic technical support is provided for intelligentization and unmanned operation of a steel continuous rolling production line.

The application provides a multi-channel radio frequency transceiving assembly, and relates to the technical field of active phased array radars.The application improves the power amplifier heat dissipation efficiency of the high-power transmitting link by separately integrating the circulators and power amplifiers involved in the high-power transmitting link in a closed metal box on a molybdenum copper heat dissipation carrier, so as to fully exert the maximum working efficiency of the bare chip, improve the working efficiency of the transceiving assembly, and use the SIP packaging technology to package other radio frequency devices of the transceiving assembly except the circulators and power amplifiers in the same circuit board in the closed metal box, so as to improve the overall integration of the transceiving assembly, reduce the radio frequency line loss of the transceiving assembly, and reduce the repair difficulty of the transceiving assembly by replacing the SIP packaging module, so that the corresponding multi-channel radio frequency transceiving assembly has the characteristics of high integration, low line loss, low repair difficulty, high airtightness, high working efficiency and the like.

The application provides an active phased array radar antenna T / R component intelligent testing method and system, which fully utilizes radar resources in a remote control mode, does not need any external device to realize antenna array element performance testing, adopts multi-frequency point and intelligent partition to test the antenna, improves testing accuracy, greatly improves active phased array antenna T / R component testing efficiency, and solves the technical problem of low active phased array antenna T / R component testing efficiency in the prior art.

The specification discloses a near-field amplitude and phase calibration method, system and device of an active phased array radar antenna, relates to the technical field of phased array radar antenna calibration, and aims to solve the problem of poor robustness of the prior art in near-field calibration of the phased array radar antenna.The method comprises the following steps: performing plane scanning on each transmission channel one by one to obtain amplitude values and phase values of each transmission channel of the phased array radar antenna; calculating errors of the amplitude values and the phase values, and calibrating each transmission channel based on the errors; judging whether plane scanning needs to be performed again, if not, calculating amplitude values and phase values of a to-be-tested transmission channel; obtaining amplitude values and phase values of a reference array surface corresponding to the to-be-tested transmission channel, calculating errors between the amplitude values and the phase values, and recalibrating the to-be-tested transmission channel based on the errors.The method improves the compensation accuracy and efficiency of the radar antenna directional diagram, and solves the problem of poor robustness of amplitude and phase calibration of the active phased array radar antenna.

The present invention discloses a common-aperture radar ESM joint tracking method for complex electromagnetic environments. The method includes: acquiring measurement combination information by setting different combination modes according to different situational scenarios; clustering measurement values ​​based on the measurement combination information and confidence levels to determine the secondary angle measurement clustering results; setting different initial track types based on the secondary angle measurement clustering results at the track initiation stage; pre-setting associated measurement types; and selecting different filtering methods or techniques based on the pre-set associated measurement types and track types during track association to determine the current angle and / or distance and velocity, and outputting the results. This method can effectively improve the stability and accuracy of target tracking and enhance the low-intercept performance of active phased array radar.

The invention discloses a Ku-band four-channel dual-polarization TR assembly based on the SIP technology, which is applied to the technical field of active phased array radars, and is characterized in that the SIP technology is applied to a multi-channel TR front-end module, and the design of a power division network and a crossed strip line network is applied to an integrated microwave thin film multilayer circuit substrate, so that the multi-channel TR front-end module can be realized; various integrated microwave chips such as an amplitude-phase multifunctional wave control chip S1, a power amplifier switch chip S2, an amplitude-limiting low-noise amplifier chip S3 and the like are matched on the surface to form a radio frequency transceiving link, so that the aims of minimizing the link and maximizing the function are fulfilled; 8 shielding areas are divided, signal leakage between channels can be effectively prevented, and it is guaranteed that all levels work in a stable environment; the TR assembly is provided with four receiving and transmitting channels and four receiving channels at the same time, meets the requirements of miniaturization, light weight, integration, multiple functions, multiple channels and dual polarization, achieves the electrical indexes of the TR assembly, and also has the functions of reliability and maintainability.