103 results about "Active Phased Array Radar" patented technology

The invention relates to distributed active phased array radar and a beam forming method thereof. A transceiving component array consists of digital transceiving components which comprise analog front ends, power amplifiers, low-noise amplifiers and front-end digital units. The distributed active phased array radar further comprises a central processor, the central processor is connected with the multiple front-end digital units through a local area network by means of the hierarchical distributed processing technology, and used for setting operating modes of all of the front-end digital units and waveform data and receiving baseband data to guarantee reliability of target echo data subjected to digital synthesis and sending public clock signals to the front-end digital units through a clock network to guarantee synchronization of clock signals of each port. The multiple front-end digital units are correspondingly distributed in an antenna array, and each front-end digital unit is matched with one transceiving component. The distributed active phased array radar and the beam forming method thereof have the advantages of high flexibility, flexibility in data processing mode and improvement of phased array radar performances.

The invention provides an amplitude and phase test system of active phased-array radar T / R assemblies, and aims at providing the amplitude and phase test system of high efficiency, reliability and test precision. The N T / R assemblies are connected to antenna directional couplers via two paths of test feed power dividing networks respectively; a frequency synthesizer, a pre-stage power amplifier, a sum and difference device, a sum circuit receiver and a test conversion module are connected between the test feed power dividing networks at the front and tail ends respectively; when test starts, a terminal in the emission T test or reception R test mode emits a test instruction to the frequency synthesizer, the frequency synthesizer outputs test start and test pulse signals, and identical test excitation signals are generated in each beat according to the test pulse; and a wave controller controls different paths of phase shifters on the basis of an orthogonal coding rule, orthogonal phase modules is carried out on the test excitation signals respectively, the modulated signals are input to a signal processor, and amplitude and phase test for all the T / R assemblies is completed.

The invention relates to a transmit-receive split planar array phased-array radar antenna array and a beam former. The method comprises designing and arranging antenna receiving arrays and transmitting arrays, connecting radar receiving assemblies with transmitting assemblies, designing beam formers of receiving large arrays and transmitting large arrays, and finally, forming synthesis scanning wave beams by use of the receiving large arrays and the transmitting large arrays, such that the problem of grid lobes generated during antenna scanning is overcome. The method is applied to low-cost design of an active phased-array radar, and is especially suitable for design of a multifunctional active phased-array radar which combines a mechanical scanning mode with an electrical scanning mode.

The invention relates to an eight-channel DDS signal source board, belonging to the technical field of digital signal processing. The eight-channel DDS signal source board comprises an analog power supply module, a digital power supply module, a clock source module, an intermediate frequency signal generation module and a logic control module. 0-400 MHz intermediate frequency signals of eight-channel are generated by using a programmable hardware structure and a DDS chip of a 1G reference clock; the eight-channel DDS signal source board is characterized by universality, expandability and capability for being programmed independently for each channel; the software is combined with the hardware to solve the phase synchronization problem among a plurality of channels under condition of usinga high-frequency reference clock; and the signal source board is used for the generation of active phased array radar emitting signals and occasions needing multi-channel and synchronous intermediatefrequency signals.

The invention discloses an active phased array radar transceiver component and a manufacturing method thereof. The assembly includes four transceiver circuit units and one multifunctional multiplexing circuit unit. Each transceiver circuit unit includes a circular isolator, a limiter, a low noise amplifier, a driving amplifier and a power amplifier. The multifunctional multiplexing circuit unit includes a 1:4 stripline power division / synthesis network, four amplitude and phase multifunctional circuits, four wave control circuits and four power modulation circuits. The receiving signal of each transceiver circuit unit is input by the antenna, passes through the ring isolator, the limiter, the low noise amplifier, the amplitude and phase multifunctional circuit, and finally the receiving signal of the four channels is divided and synthesized by the 1:4 strip line power division / synthesis network. Signal synthesis output; while the transmission signal is input from the common terminal of the components, and output through the 1:4 stripline power division / synthesis network, amplitude-phase multifunctional circuit, drive amplifier, power amplifier, and ring isolator. The invention also discloses the design and manufacture method of the assembly.

The invention discloses a self-calibration method for a receiving-transmitting channel of an active phased array radar. The self-calibration method for the receiving-transmitting channel of the active phased array radar uses an input-output signal coupling circuit and uses a multi-channel power dividing circuit to combine coupling signals of a plurality of receiving-transmitting channels into one channel. The self-calibration method for the receiving-transmitting channel of the active phased array radar realizes to independently calibrate each receiving-transmitting channel online without returning to depot and also plays a role of fault locating.

The invention provides an amplitude phase calibrating device for semi-closed loop coupled phased array channels. Each channel of an active phased array plane is coupled to one waveguide coupler, thereby forming a coupling loop. Two ends of the coupling loop are connected with a signal receiving and transmitting module and a load. When a channel of the active phased array plane transmits an amplitude phase, a transmission system of the active phased array plane transmits a signal, and the signal receiving and transmitting module of the coupling loop receives the signal. When the channel of the active phased array plane receives the amplitude phase, the signal receiving and transmitting module of the coupling loop transmits a signal, and a system of the active phased array plane receives the signal. The transmitted or received amplitude phase information is fed back to a beam control dispatcher of an array phased array radar for amplitude phase calibration. The device not only can be used for the amplitude phase calibration of a phased array before assembly, also can be used for channel detection and amplitude phase calibration after assembly, enables the waveform design of the phased array to be more accurate, and enables the performance of the array phased array radar to be better.

The invention discloses an unmanned aerial vehicle resisting distributed networking detection method and device. The unmanned aerial vehicle resisting distributed networking detection method comprises the steps that at least two photoelectric infrared composite sensing detection assemblies are enabled to form an unmanned aerial vehicle resisting detection network; each photoelectric infrared composite sensing detection assembly determines the position thereof through a satellite positioning unit; a broadband active phased array radar unit in each composite detection assembly detects and discovers the position of an unmanned aerial vehicle to be detected; a visible light and infrared imaging unit in each composite detection assembly perform focused joint imaging on the unmanned aerial vehicle to be detected; and a plurality of positions of the unmanned aerial vehicles to be detected in the plurality of composite detection assemblies are fused to act as high-precision position output so as to complete stable and accurate tracking for the unmanned aerial vehicle to be detected accordingly, and a plurality of images of the unmanned aerial vehicle to be detected are fused to act as clear and complete image output so as to complete automatic and accurate recognition for the unmanned aerial vehicle to be detected accordingly. The unmanned aerial vehicle resisting distributed networking detection method has the advantages of convenient operation, wide detection area, high capturing rate, excellent positioning accuracy, high recognition rate and the like.

The invention relates to the technical field of design of TR assemblies in active phased array radar, in particular to a high-integrity TR radio frequency module. The high-integrity TR radio frequency module is formed by buckling and combining two 1X8 modules, each 1X8 module mainly comprises a box, an LTCC integrated circuit, a waveform control daughter board, a waveguide-micr0-strip conversion structure, a radio frequency input interface and an output interface are arranged in the box, the waveform control daughter board and the LTCC integrated circuit are connected through golden wire binding, an LTCC substrate serves as a carrier of the LTCC integrated circuit, and a front-end drive chip, a power divider, an 8-path TR channel and a DAC control chip are integrated on the LTCC substrate. The chips and a multifunctional circuit are integrated on the basis of the LTCC multi-layer substrate, and then by means of interconnection achieved through micro-electrons, the high-integrity TR radio frequency module is small in size and high in integrity and has an amplitude and phase controlling function.

The invention discloses a pulse modulating system of a radar system. The pulse modulating system of the radar system comprises a signal input / output port, a signal conversion circuit, a pulse generating module and a drive module, wherein the signal input / output port is used for receiving commands of a radar processor and feeding back data, the signal conversion circuit is used for converting command control level signals sent from the radar processor into 3.3 VTTL level signals needed for the pulse generating module and converting the 3.3 VTTL level signals fed back from the pulse generating module into level signals capable of being identified by the radar processor, the pulse generating module is used for sending pulse signals with variable amplitude, pulse width and frequency according to commands sent from the radar processor, and the drive module is used for driving an MOSFET module to output a high-voltage large-current pulse modulating voltage after amplifying the pulse signals. The pulse modulating system of the radar system is convenient to regulate the pulse modulation conduction time and the pulse repeating frequency of an active emitting circuit and an active receiving circuit of an active phased array radar according to the use needs.

The invention relates to a large-scale active phased array radar integrated structure, which adopts a layout form of arranging a front cabin and a rear cabin. The front cabin is used for installing a transceiving assembly and antenna dipoles. The rear cabin is used for installing other subsystems. In order to improve repeated positioning precision of the antenna dipoles, the dipoles are installed on the transceiving assembly, the front surface and the rear surface of the transceiving assembly are each provided with a positioning pin, the front positioning pin can ensure the repeated positioning precision of the antenna dipoles, and the rear positioning pin can ensure the blind matching precision of the transceiving assembly and a socket. In order to improve the maintainability of a radar, an antenna cover adopts a bidirectional sliding rail installation method and can be manually disassembled in the field. In order to improve the reliability of the radar, the glues pouring and reinforcement processing is carried out on the blind matching socket used for the transceiving assembly.

The invention discloses an active phased array radar antenna subarray division method. The method includes the steps of firstly, acquiring an array element distribution form, an array element distance and an array element number, and calculating a coordinate vector; secondly, acquiring a weighted vector; thirdly, calculating the weighted vector through a genetic algorithm to obtain an initialization clustering center; fourthly, performing clustering division on the initialization clustering center to obtain an active phased array radar antenna subarray division form, and calculating the fitness evaluation function of the active phased array radar antenna subarray division form; fifthly, presetting a threshold, and judging whether the fitness evaluation function exceeds the threshold or not; if not, terminating. The active phased array radar antenna subarray division method has the advantages that the method fuses the genetic algorithm and a fuzzy C-means clustering algorithm, the advantages of the two algorithms brought into full play, and a genetic clustering algorithm is provided.

The invention discloses a fast calibration method for an active phase array radar. The fast calibration method comprises the steps that a microwave signal in an emitting channel of the active phase array radar is converted into an intermediate-frequency signal through an oscillation signal, A / D sampling and orthogonal digital frequency mixing are carried out on the intermediate-frequency signal, and the signal obtained after frequency mixing is converted into a linear frequency-modulated signal through low-pass filtering; the delay time between the linear frequency-modulated signal in the emitting channel and a reference signal is obtained; the amplitude and phase of the linear frequency-modulated signal in the channel are calibrated through calibration of the amplitude and phase of a predefined carrier frequency signal. The systematized emitting channel fast calibration method is provided for the active phase array radar, the real-time performance of the calibration process and robustness of the calibration result are guaranteed, and the method is suitable for being applied to engineering.

The invention discloses a high-integration and low-cost active phased array radar radio frequency front end. A single microwave multilayer printed board is used as a carrier, and an array antenna, a transceiving component, a down converter, a correction network and a digital control module are simultaneously integrated on a board card, wherein the array antenna is used for receiving and transmitting radio frequency signals, the transceiving component is used for amplifying, shifting and attenuating the transceiving radio frequency signals and switching the transceiving and correction modes, the down converter is used for down-converting and receiving of echo signals, the correction network is used for correcting phase errors of each transceiving channel, and the digital control module is used for finishing the control of amplifiers, switches and phase shifters at all levels in the system. The integrated design scheme is adopted, the structure is simple, the size and the weight of the active phased array radar radio frequency front end are effectively reduced, and the system cost is reduced.

The invention provides a platform for parametric modeling and comprehensive optimization design of active phased array radar. The platform is based on a whole radar parametric modeling and multi-disciplinary optimization design philosophy, the whole radar is quickly and accurately modeled, and unity coupling simulation optimization is conducted on radio communication signals, radio communication signals of heat distribution, impact vibration, electromagnetic compatibility, reliability, the structure and the process of all components through ADS, ANSYS, FLO / EMC, ISIGHT and other simulation software, so that verification and comprehensive improvement of overall performance indexes of the radar are supported. The platform effectively solves the problems that modeling of existing active phased array radar is complex, long in period and low in efficiency, and comprehensive optimization of all components of the whole radar can be difficultly supported, and the platform is suitable for development of various kinds of active phased array radar at home or domestic development through introduction of key core components of the active phased array radar, and has powerful promotion effects on improving design efficiency of all the components of the radar, reducing development cost and accelerating equipment design and lot production processes.

The invention provides a loop control system design method and a frame structure of an active phased array radar antenna, which can effectively solve the problem of thermal control of low-power components that are distributed dispersedly, such as a unit controller, a high-frequency receiver, a power distribution network and the like in an active phased array radar antenna except T / R components anda power supply thereof, and generally realizes the technical means of air cooling and liquid cooling mixed heat dissipation of an active phased array antenna. Compared with the prior art, the schemeof the invention has the following advantages: 1, the problem of heat dissipation of the low-power components such as the unit controller, the high-frequency receiver, the T components, the power distribution network and the like in the active phased array radar antenna can be solved, and the scheme can be matched with a liquid cooling cold plate aiming at the T / R components and the power supply to realize the technical means of air cooling and liquid cooling mixed heat dissipation of an active phased array radar antenna system; 2, an air supply channel and an air return channel are both basedon a middle sandwich structure of a side beam of an antenna frame, the process of specially designing a static pressure cavity is not required, the size of the antenna can be reduced, and the integration of the structure and a heat dissipation function can be achieved; and 3, the fluid flow direction is generally parallel to the installation direction of the cold plate and power consumption components, and thus the flow resistance can be reduced, and the power consumption requirements of a fan and the power supply can be reduced.

The invention relates to a heat dissipation temperature control technology for an active phased array radar assembly. A plurality of T / R assemblies are installed collectively on one temperature equalization plate by screws; a thermal-conducting gasket is arranged between contact surfaces of the temperature equalization plate and the T / R assemblies; and the temperature equalization plate is weldedto a substrate. A plurality of thermal tubes having different lengths, different shapes and different specifications are arranged on one side panel, in contact with the temperature equalization plate,of the substrate symmetrically; the tails of the plurality of thermal tubes are collected and concentrated at four side corners of the substrate respectively; and cylindrical cooling fins are arranged at four corner areas of the substrate. The heat dissipation temperature control technology has the following beneficial effects: on the basis of the combined thermal-cavity cooling structure of combination of the thermal tubes, the temperature equalization plate, and the cooling fins, the active phased array radar assembly is cooled; the heat dissipation efficiency is high, the temperature uniformity is high, and the reliability is high; and the active phased array radar assembly works normally and continuously.

The invention relates to an active phased array radar reception channel correction method based on fixed ground object echoes, and mainly solves the problems that active phased array radar reception channel correction is complicated to operate, relies on auxiliary sources or the like in an outfield working condition. The method is realized by the following steps: firstly, applying pulse pressure to fixed ground object echoes and obtaining a pulse pressure sample set; secondly, carrying out primary election, peak value alignment and correlation screening on the pulse pressure sample set, and obtaining a to-be-corrected sample set; thirdly, calculating a correlation matrix and a noise sub-space of the to-be-corrected sample set; fourthly, establishing a convex optimization model on the basisof orthogonality of the sub-space and solving a relative error vector; and fifthly, conducting error correction on a reception channel through the relative error vector. Good estimation of amplitudephase errors of the reception channel is obtained without construction of auxiliary sources, sidelobe levels of a radar receiving pattern are reduced, and the method can be used for reception channelcorrection of an active phased array radar outfield working environment.

The invention discloses a correction device and method for an airborne two-dimensional active phased array radar antenna. The correction device comprises a two-dimensional active phased array antenna,a receiver, a signal processor and a display control unit. According to the correction device and method of the invention, the amplitude and phase error of the TR channels of a complex two-dimensional active phased array antenna is realized on the basis of the hardware architecture of the radar with no additional hardware resources required; an automatic correction function is adopted, so that the efficiency of the calibration of an airborne SAR / MTI radar with a large number of TR channels is greatly improved; an efficient correction algorithm is adopted, the number of correction iterations is reduced, correction accuracy is improved, and system calibration reliability is increased; detailed functional division is performed on each link of correction, and quantifiable indicator requirements are provided for each function module, and therefore, the test and verification of the correction device and method in engineering practice and the application of the correction device and method to the engineering practice can be benefitted; and the reliable operating performance of the active phased array radar is improved. The correction device and method can adapt to the rapid development trend of modern battlefield reconnaissance and surveillance equipment so as to meet the application requirements of SAR / MTI radars for ground / sea multi-mode and multi-mode integrated reconnaissance andsurveillance.

The invention relates to a precision active phased-array radar antenna frame which is characterized in that a giant frame is composed of an upper transverse beam, a right vertical beam, a lower transverse beam and a left vertical beam, the upper transverse beam, the right vertical beam, the lower transverse beam and the left vertical beam are in rivet connection through corner fittings, a T-shaped structure is composed of a combination vertical beam and a combination transverse beam, the combination transverse beam is connected between the right vertical beam and the left vertical beam in an across mode, the combination vertical beam is connected between the combination transverse beam 8 and the lower transverse beam in an across mode, an antenna installation base plate is fixedly connected to a frame structure composed of the upper transverse beam, the right vertical beam, the left vertical beam and the combination transverse beam, and a plurality of guiding transverse beams are installed inside the frame structure composed of the upper transverse beam, the right vertical beam, the left vertical beam and the combination transverse beam. The precision active phased-array radar antenna frame is good in rigidity, light in weight and attractive in appearance, and meanwhile meets the requirements for blind-plug fit connection and the like between considerable antenna oscillators and considerable receiving and transmitting units.

The invention relates to the field of active phased array radar equipment, in particular to a heat dissipation structure of an active phased array antenna. The heat dissipation structure of the active phased array antenna comprises two T / R assemblies which are symmetrically arranged and a heat transmitting device, wherein one part of the heat transmitting device is clamped between the T / R assemblies and closely attached to the T / R assemblies, and the other part of the heat transmitting device is connected to a cooling plate in an inserted mode; the heat transmitting device is used for transmitting heat generated by the T / R assemblies to the cooling plate.

The invention discloses a millimeter wave multi-channel multifunctional SOC chip, and belongs to the field of chip integration. The chip comprises a power division circuit, a digital control circuit module, four millimeter wave amplitude-phase control circuit modules, five millimeter wave signal input / output interfaces and multiple power supply digital circuit interfaces integrated on a same chip;one millimeter wave amplitude-phase control circuit module is corresponding to a channel; the power division circuit is connected with the millimeter amplitude-phase control circuit modules separately; the millimeter signal input / output interface is separately connected with the power division circuit and the millimeter amplitude-phase control circuit module; each millimeter amplitude-phase control circuit module is integrated with a six-bit numerical control attenuator circuit and a six-bit numerical control phase shifting circuit; the numerical control circuit comprises a numerical deserializing module and four channel latch selection modules; the problems that the millimeter wave active phased-array radar cannot be miniaturized, low in cost and conformal in application are solved, andthe size of the millimeter wave multi-channel multifunctional SOC chip is reduced.

The invention relates to the technical field of TR assemblies in active phased-array radars, in particular to a TR radio frequency module. The TR radio frequency module comprises a box body for a circuit and a function module to be installed, wherein an LTCC integrated circuit, a control sub-board, a waveguide-microstrip converting structure, a radio frequency input interface and a radio frequency output interface are installed in the box body, and the control sub-board is connected with the LTCC integrated circuit through gold wire welding. The LTCC integrated circuit uses an LTCC substrate as a carrier, a radio frequency chip group, a digital-to-analogue conversion chip and a driving chip are integrated on the LTCC substrate, and the radio frequency input interface is connected with the radio frequency output interface through the waveguide-microstrip converting structure, the driving chip and the radio frequency chip group sequentially. The chip and the multifunctional circuit are integrated on the TR radio frequency module based on the LTCC multi-layer substrate, and the TR radio frequency module has amplitude and phase control functions and is small in size, high integration and high in reliability.

The invention discloses a near field calibration method for an active phased array radar antenna. Problems existing in the prior art, such as wide calibration scanning range, low precision, high computational effort and the like, are mainly solved. The near field calibration method comprises the following steps: calibrating channel numbers, and establishing a channel mapping relation; configuringoff-net frequency parameters, and inputting interchannel spacing; sequentially powering up antenna units; setting channel amplitude of the antenna units to be 0 one by one, setting the phase as 0 degree, and setting poles for residual channels of the antenna units; setting the channel amplitude as 0, and setting the phase as 180 degrees; solving first real-time amplitude and a first real-time phase of the channel; setting the channel amplitude as 0, and sequentially setting the phases as K degrees and (180 plus K) degrees, and solving second real-time amplitude and a second real-time phase ofthe channel; reversing the data of the first real-time phase to the channels. The near field calibration method disclosed by the invention has the advantages of high calibration efficiency, low energyconsumption, high precision, less computational effort and the like, and has wide market prospects and popularization value in the technical field of active phased array radar antennas.

The invention discloses an airborne stable platform for an active phased-array antenna. The airborne stable platform for the active phased-array antenna comprises a carrying frame, a driving device, an angle feedback device, a photoelectric slip ring assembly, an auxiliary frame and a servo control device. The carrying frame is mounted on an aerial carrier frame, the driving device, the angle feedback device and the photoelectric slip ring assembly are integrally installed inside the carrying frame, the lower end of the auxiliary frame is connected to the upper end of the carrying frame, the upper end of the auxiliary frame is connected to the servo control device, the driving device is provided with a motor, the mandrel of the rotor portion of the motor is a hollow shaft, an azimuth shaftof the circular tube structure is arranged in the hollow shaft in a sleeving mode, the upper part of the azimuth shaft is connected with the angle feedback device, the lower end surface of the azimuth shaft is connected with the upper end surface of a mounting board, the lower end surface of the mounting board is connected with the active phased-array radar antenna, and the motor drives the radarantenna to continuously rotate by 360 degrees. The airborne stable platform for the active phased-array antenna is wide in application range, high in integration and large induty ratio.

The invention discloses a radar antenna array surface fault detection method and a radar antenna array surface fault detection system, and relates to the field of radars. The method comprises the steps of building a training set and a test set according to detected data of n modules; randomly selecting the detected data of m modules from the training set to build new training sets, wherein the t new training sets are jointly built; separately training a preset fault judgment model according to the t new training sets, thus acquiring t trained fault judgment models; and separately testing the trained fault judgment model according to the test set, and determining the faulted module according to a test result. According to the method and system provided by the invention, the detected data ofthe multiple modules of the radar antenna array surface is analyzed in a unified manner, the defect of the analysis method that only uses a single fault characteristic quantity is overcome, the faultcan be quickly and conveniently positioned, the radar fault analysis and fault prediction are effectively assisted, the fault detection requirement of the antenna array surface of the active phased array radar can be met, and the wide application value and the market prospect are achieved.

The invention discloses a deformation active phased array radar detection performance rapid assessment method based on electromechanical coupling. The method comprises the following steps: 1) determining an array antenna array element type of an active phased array radar; 2) determining a structure parameter and an electromagnetic working parameter of an array antenna; 3) computing an ideal antenna directional diagram and an antenna important performance parameter based on the array antenna radiation principle; 4) performing structure analysis on a radar antenna under certain working environment load; 5) obtaining array antenna unit structure displacement; and 6) rapidly determining the radar main detection performance index after deformation according to a radar main detection performanceanalysis parameter model before and after antenna structure deformation. Through the method disclosed by the invention, the rapid prediction and analysis method of the radar detection performance ofthe radar under the environment load effect after the antenna array structure deformation is realized.

The invention provides an active phased array radar array plane fault injection device and method. A VPX bus architecture is adopted, and a PCIE bus protocol is utilized, a parallel computing module and a main control module are used for simulating array plane fault data. Downlink data errors caused by transmission errors, time sequence errors, array plane unit failure and the like of an active phased array radar array plane can be simulated, the simulated fault types include system faults, data faults, algorithm faults, software faults and the like, the simulated fault types are injected intoradar signal processing and DBF subsystems through optical fibers, fault simulation is achieved, a heterogeneous platform framework is used, function extension is facilitated based on a universal development language, and the expansibility and universality are high.

The invention discloses a multi-channel calibration method for an active phased array radar. The multi-channel calibration method for the active phased array radar comprises configuring a plurality of receiving channels in an active phased array radar system, wherein every receiving channel comprises a plurality of frequency domain carrier wave subsets and calibrating the gain amplitude of a plurality of single receiving channels of the same carrier wave subset and the gain amplitude of different carrier wave subsets of the same receiving channel. The multi-channel calibration method for the active phased array radar effectively compensates inconformity of the amplitude and the characteristic of the receiving channels and obtains a better multi-channel calibration performance.