301 results about "Radar antennas" patented technology

The invention discloses a phased array radar antenna array plane and air-cooled uniform-temperature heat dissipation structure, which optimizes the structure and layout of a heat dissipation air duct of the antenna array plane, and overall designs component modules and the heat dissipation air duct to achieve the effect that the temperatures of components at symmetrical positions of four quadrants of the antenna array plane are consistent; an independent fan is designed for each heat dissipation air duct, and the air volume is determined according to the heat power consumption of each air duct; a heat pipe is designed on a heat exchange contact surface at the bottom of the heat dissipation air duct to reduce the temperature difference of the assembly along the air duct direction; the heat dissipation air channel is completely sealed and isolated from each functional module in the antenna array plane; the inner surface of the heat dissipation air channel is coated with the infrared ceramic radiation heat dissipation coating, salt spray corrosion can be resisted, heat dissipation is facilitated, and the outdoor environment requirement can be met. Through the design, the temperature difference of the components on the antenna array plane is reduced, and the phase consistency requirement of the antenna array plane components is met.

The invention relates to the technical field of simulation design, in particular to a design method and system based on a radar antenna, and the method comprises the following steps: resolving a phase error based on thermal deformation, analyzing a dynamic sidelobe variance in combination with displacement spectrum integration and covariance mapping, and generating a waveguide skeleton through electromagnetic energy mapping fluid damping; according to the method, thermally induced phase error data is introduced, the influence of structural deformation on the phase is accurately calculated, and meanwhile, calculation of dynamic group delay and group delay difference is combined, so that the phase correction accuracy is improved. Prediction of influence of structural deformation on electrical performance, data fusion of multiple physical fields and automatic process optimization are realized, design precision and efficiency are improved, limitation of single simulation software is avoided, factors such as material loss and gain evolution are accurately corrected in the design process, performance requirements of the high-frequency radar are met, and complex environment adaptability is improved.

The embodiment of the invention provides a design method of a wave-absorbing / wave-transmitting electrically-controlled switchable antenna housing, the structure of the antenna housing comprises an absorbing layer frequency selective surface, a dielectric layer and a wave-transmitting layer frequency selective surface from top to bottom, the absorbing layer frequency selective surface can carry out in-band loss and in-band transmission, the wave-transmitting layer can carry out in-band transmission and out-of-band reflection, and the dielectric layer can carry out in-band transmission and out-of-band reflection. The overall structure interacts to form a radar radome structure integrating absorption and transmission; a microwave network is adopted to carry out impedance analysis on the absorption and transmission radome, parameters are set to represent the characteristics of the microwave network, and meanwhile, a transmission matrix of the microwave network is analyzed through a matrix. The designed antenna housing not only has good out-of-band wave-absorbing stealth performance, but also can switch an in-band wave-transmitting state to a wave-absorbing state through electric control to realize limit stealth.

The invention discloses a phased array radar antenna and a detection method thereof, and belongs to the technical field of phased array radars, and the method comprises the steps: designing a radar system to improve the performance, optimize from multiple aspects, select and adapt to the antenna array size and arrangement of radar application, optimize the number and position of units, and determine the configuration through an algorithm to meet the beam detection precision. According to the method, phased array radar electronic control is improved, a high-precision DSP technology is used for regulating and controlling the phase of an antenna unit, the phase adjustment performance is improved to guarantee beam scanning, and a self-adaptive beam forming technology is applied. According to the method, the correlation between the target and the target is cancelled, the target is prevented from following an interference point, the probability of wrong target following is effectively reduced, the correlation judgment accuracy is improved through correlation of multi-dimensional information such as radial speed and echo characteristics, and the target tracking stability is improved while the maneuvering target tracking capability is kept.

The embodiment of the invention relates to the technical field of communication, and discloses a radar antenna and an automobile intelligent driving system.The radar antenna comprises a substrate, an electromagnetic band gap structure layer, a ridge waveguide transmission structure and an antenna radiation layer, the electromagnetic band gap structure layer is provided with a pin unit, and the pin unit forms an electromagnetic shielding area; the ridge waveguide transmission structure is arranged in the electromagnetic band gap structure layer, one end of the ridge waveguide transmission structure is connected with a chip interface, the other end of the ridge waveguide transmission structure is connected with the antenna radiation layer, and the antenna radiation layer comprises a plurality of slot antennas arranged in the longitudinal direction and a plurality of choke groove assemblies. One choke groove assembly is adjacent to one slot antenna, and the electromagnetic band gap structure layer is connected with the antenna radiation layer to form a gap waveguide transmission channel. By means of the mode, electromagnetic connection between the layers can be achieved without a welding process, and the influence of welding quality difference on the antenna performance is avoided.

The invention provides a radar antenna structure damage and function damage mapping evaluation method and system based on a subarray-level equivalent target, and relates to the technical field of radar antenna damage effect evaluation. According to the method, a baseline parameter set is formed through standardized filing of functional parameters of an equivalent target array structure, damage is loaded and damage parameters are collected under a preset working condition, main lobe gain, beam width, side lobe level and beam pointing are tested, functional variable quantity is calculated, array surface damage is divided and coded through a two-dimensional matrix and blocks, and standardized input is generated. A quantitative mapping model is established, and through cross validation, residual analysis optimization and adaptive updating, high-precision and traceable evaluation of structures and functions under multiple working conditions is realized, and support is provided for criterion optimization and anti-damage design.

To provide a mounting technique capable of enhancing a radar detection distance.SOLUTION: The radar antenna device is for installation on a side of a vehicle. The radar antenna device comprises two antenna circuit boards, wherein each antenna circuit board comprises a first side comprising a signal transmitting unit and a signal receiving unit. The signal transmitting unit includes a first signal zone, and the first signal zone is located within an angle range between 0 degree and 50 degrees from a normal of a center of the first surface. The radar antenna device also comprises a base for mounting the two antenna circuit boards. One end of each antenna circuit board is coupled to one end of the base such that a first direction parallel to the base and extending from a center of the first surface is located in the first signal zone and forms an angle between 52.5 degrees and 65 degrees.SELECTED DRAWING: Figure 3

A gunshot detection system includes a housing, a radar transmitter connected to the housing, a plurality of radar antennas connected to the housing, and a controller connected to the housing. The controller is operatively connected to the radar transmitter to cause the radar transmitter to generate radar transmission signals. The controller is configured to receive and record reflection data from the plurality of radar antennas. The controller is configured to determine a gunshot origination location of each bullet moving through a detection zone based on the reflection data.

The application provides a radar antenna abnormal channel correction method and device and a storage medium, and relates to the field of radars.The method comprises the following steps: acquiring an amplitude array matrix and a phase array matrix of a radar for detecting a target; determining an amplitude abnormal channel according to the clustering distribution of amplitudes in the amplitude array matrix; correcting the amplitude of the amplitude abnormal channel by using the amplitude of a non-amplitude abnormal channel in the amplitude array matrix, so as to obtain a corrected amplitude array matrix; determining a phase abnormal channel according to the clustering distribution of phase differences between two adjacent channels in the phase array matrix; correcting the phase of the phase abnormal channel by using the phase of a non-phase abnormal channel in the phase array matrix, so as to obtain a corrected phase array matrix; and obtaining corrected channel data according to the corrected amplitude array matrix and the corrected phase array matrix.The method is suitable for the radar detection process and can be used to solve the problem that the measurement angle result is not ideal.

The invention belongs to the technical field of radars, and particularly relates to an airborne radar antenna installation angle error calibration method and device, and the method comprises the steps: S1, measuring the center position of an airborne radar antenna array plane and the actual positions of all calibration sources in a far field; s2, obtaining azimuth angles and pitch angles of all calibration sources measured by the radar; s3, radar antenna mounting angles are calculated according to the measured azimuth angles and pitch angles of all the calibration sources, the actual positions of all the calibration sources and the center position of the radar antenna array plane, wherein the radar antenna mounting angles comprise the azimuth mounting angle, the pitch mounting angle and the roll mounting angle; and S4, subtracting the design value from the calculated radar antenna installation angle to obtain an installation angle error, wherein the installation angle error comprises an azimuth installation angle error, a pitching installation angle error and a roll installation angle error. The target angle measurement precision of the radar is improved.

The invention belongs to the field of radar antennas, and particularly relates to an oversized radar antenna pitch angle adjusting mechanism which comprises a balance weight supporting ring and a hoisting mechanism which are arranged below a radar antenna, the balance weight supporting ring is of a fan-shaped structure, and the balance weight supporting ring has the swing freedom degree by being hinged to a supporting frame. The hoisting mechanism is connected with the two sides of the counterweight supporting ring through steel wire ropes led out of a reel, the radar antenna is driven to adjust the pitch angle through forward and reverse rotation of the reel, multiple sets of steel wire ropes are arranged between the counterweight supporting ring and the reel in parallel, and the adjusting mechanism further comprises a restraining device. The restraining device comprises a base and a restraining shaft set arranged on the base in parallel, the base is arranged on the supporting frame, a restraining roller is arranged on the restraining shaft set, and the steel wire rope is wound on the restraining roller. The restraint device is additionally arranged, the steel wire rope is prevented from shaking and colliding, the service life of the steel wire rope is prolonged, and the pitch angle adjusting precision of the radar antenna can be improved.

This application relates to the fields of SAR signal processing and marine remote sensing applications, and provides a method and apparatus for sea surface current field inversion based on electromagnetic vortex wave radar data. The method determines the Doppler spectrum using electromagnetic vortex wave radar image data, obtains the measured frequency position of the trough feature point in the Doppler spectrum, and determines the theoretical frequency position using the position and angle of the two main lobes and the angle of the trough feature point in the radar antenna pattern. Then, the difference between the measured frequency position and the theoretical frequency position is used to obtain the anomalous frequency offset. Next, the Doppler frequency offset caused by wind and wave motion is removed from this anomalous frequency offset to obtain the target Doppler frequency offset. Finally, the radial velocity of the sea surface is calculated using the Doppler frequency offset, thus realizing sea surface current field inversion. This effectively expands the applicability of the Doppler frequency shift-based ocean current inversion method and improves the application potential of electromagnetic vortex wave radar in sea surface current field detection.

The utility model relates to the field of clamp devices, in particular to a clamp device of an elastic radar detection antenna, which comprises an antenna plate, a metal reflecting plate, a clamping assembly, an adjusting assembly, an air cylinder and a mounting plate. According to the utility model, through arranging the clamping assembly and the adjusting assembly which are provided with buffer structures, vibration and impact on the radar antenna in the working process can be effectively absorbed and dispersed, so that the stable position of the antenna is maintained, the stability of radar detection is improved, the accuracy of radar detection is improved, and the working efficiency is improved. And the service life of the whole radar detection system can be prolonged by reducing the abrasion of vibration and impact to the antenna and the clamp thereof.

The invention discloses a metal truss antenna housing and a design method thereof, and belongs to the field of radar antennas. In order to solve the problem that an antenna radiation pattern of an existing antenna housing is seriously distorted, the metal truss antenna housing comprises a metal framework and a skin arranged on the surface of the metal framework, the metal framework is of a truss structure, and a first section of at least part of rod pieces in the metal framework comprises a connecting part. The reflecting part is connected with the connecting part; the reflecting part is used for realizing non-mirror scattering between a reflected wave and the first cross section of the partial rod piece; the connecting part is used for realizing the connection between the rod pieces, and the first cross section is the cross section of one side, facing the antenna, of the rod piece. According to the metal truss, mirror reflection is converted into non-mirror scattering through the arrangement of the reflection part, so that distortion of an antenna pattern is effectively suppressed, particularly, raising of a far-region minor lobe level and loss of main lobe gain are reduced, and meanwhile, the original high-strength advantage of the metal truss is completely reserved through the arrangement of the connection part.

The invention provides a multi-unmanned aerial vehicle cooperative hoisting radar antenna aerial operation device and a coordinate transformation method, and belongs to the technical field of unmanned aerial vehicle control. The device comprises a radar antenna, a device landing base and a multi-rotor unmanned aerial vehicle cooperative hoisting uniform force platform system; the multi-rotor unmanned aerial vehicle collaborative suspension uniform force platform system comprises a plurality of multi-rotor unmanned aerial vehicles, a rigid uniform force connecting ring, a carbon fiber tube, a suspension cable and a rigid connecting arm, the plurality of multi-rotor unmanned aerial vehicles are connected with the rigid uniform force connecting ring through the suspension cable, the carbon fiber tube is arranged on the rigid uniform force connecting ring, and the rigid connecting arm is connected with the rigid uniform force connecting ring through the suspension cable. The back of the radar antenna is provided with a supporting beam, one end of the rigid connecting arm is connected with the carbon fiber tube, and the other end of the rigid connecting arm is connected with the supporting beam. According to the scheme, the target pose of the radar antenna is efficiently and accurately decomposed into the cooperative motion instruction of the unmanned aerial vehicle cluster, and it is ensured that the ground radar antenna becomes a high-stability and high-precision working platform in the air.

The invention relates to a radar unit for a vehicle, comprising a radar antenna (1) and a radome (3) surrounding the radar antenna (1) to protect the radar antenna (1), as well as a laser emitter unit (5) whose emission range is directed towards the radome (3) to heat the radome (3).

The application discloses a kind of vehicle-mounted tunnel lining defect detection device and method, wherein the method comprises: tunnel lining interior fine detection mechanism is with mechanical arm swing mode and vertical lifting mode, respectively with the ground coupling type geological radar antenna carried, extend to tunnel lining surface, and the spacing between ground coupling type geological radar antenna and tunnel lining surface is controlled in preset distance interval;Tunnel lining interior rapid screening device is with mechanical electric drive servo dynamic adjustment air-coupled geological radar antenna carried;Detection data evaluation system carries out the calculation of tunnel lining quality index, and obtains tunnel lining defect detection result;The tunnel lining quality index reflects the degree of tunnel lining defect.The application can improve the efficiency and accuracy of vehicle-mounted tunnel lining defect detection.

The invention provides an ultra-large array plane radar satellite decoupling vacuum thermal test method, which comprises the following steps of: arranging a satellite and radar antennas in a vacuum tank, detaching the radar antennas from the satellite, arranging the radar antennas on one side of the satellite side by side, and respectively arranging infrared simulation devices around the satellite to simulate external thermal flow; a wave absorbing device is arranged on an antenna array plane to absorb microwaves and simulate external heat flow, the power level of an infrared simulation device is adjusted according to the heat radiation level of the satellite surface, the power level of the wave absorbing device is adjusted according to the microwave emission power and the heat radiation level of the antenna array plane, and a vacuum thermal test is performed on the satellite and the antenna. According to the invention, vacuum thermal tests on a satellite and a radar antenna due to an overlarge antenna array plane can be avoided, a whole-satellite microwave wireless emission state test can be carried out, extremely high-risk operation caused by hanging and unfolding in an antenna tank is avoided after the antenna and the satellite are decoupled, the tank occupation period of links such as test state establishment and withdrawal is greatly shortened, and the test efficiency is improved. And the model development efficiency is improved.

This invention belongs to the field of microwave communication, specifically disclosing a low-parasitic amplitude modulation differential bridge T-type phase shifter. The ground terminals of the differential positive branch phase shifter circuit and the differential negative branch phase shifter circuit are connected to form a differential virtual ground. A first input port is connected to the input terminal of the differential positive branch phase shifter circuit via a matching circuit, and a second input port is connected to the input terminal of the differential negative branch phase shifter circuit via a matching circuit. The output terminal of the differential positive branch phase shifter circuit is connected to the first output port, and the output terminal of the differential negative branch phase shifter circuit is connected to the second output port. A first insertion loss adjustment circuit is connected in parallel between the matching circuit and the phase shifter circuit, and a second insertion loss adjustment circuit is connected in parallel between the phase shifter circuit and the signal output port. This invention reduces the difference in insertion loss between the bridge T-type phase shifter in the reference state and the phase shifter state, thus reducing parasitic amplitude modulation. This invention is applicable to phase control in phased array radar antenna elements.

The application discloses a radar high-resolution imaging method based on a fast shrinkage iterative threshold network, which is applied to the field of radar detection and imaging. The low-pass characteristic of a radar antenna pattern makes the deconvolution problem a pathological problem, the frequency band width of which is limited, and direct inverse filtering can cause high-frequency noise amplification and cannot obtain stable inversion results. The application combines the interpretability of an iterative algorithm and the advantages of deep learning, expands a fast iterative shrinkage threshold algorithm into a deep network, and can be used to solve the problems of low azimuth resolution of an existing scanning radar and difficulty in manually selecting parameters, so as to realize super-resolution imaging of the scanning radar. The application has the characteristics that two-dimensional radar data is divided into one-dimensional azimuth vectors, one-dimensional convolution is used to fully learn the characteristics of the azimuth data, the optimal parameters in the fast shrinkage threshold algorithm are obtained, and the azimuth resolution of the radar image is effectively improved.

The application discloses a non-line-of-sight building layout relocation method and device in array interferometric synthetic aperture radar three-dimensional imaging, a storage medium and a program product, and is applied to the technical field of array interferometric synthetic aperture radar three-dimensional imaging. The method is aimed at the problem that the prior art cannot realize non-line-of-sight building layout relocation when building layout parameters are unknown. The method comprises the following steps: firstly, an array interferometric synthetic aperture radar system is used to obtain an initial three-dimensional point cloud of an observation scene; then, an Alpha Shape algorithm is applied to surface reconstruction of the point cloud to construct a boundary model for reflection path analysis; then, whether a line connecting the point cloud and a radar antenna intersects with a surface model is analyzed to identify non-line-of-sight points and associated reflection points; finally, a density clustering and plane fitting algorithm is used to correct and relocate the non-line-of-sight building layout in combination with a mirror symmetry geometric relationship. The method does not need prior structural information, can effectively identify a multipath reflection path, restore the real spatial position of a building in a non-line-of-sight area, significantly improves three-dimensional imaging precision, and provides strong support for SAR applications such as city perception and structure reconstruction.

The application discloses an X-band intelligent circular ring array antenna and a control method thereof, and relates to the technical field of radar antennas.The antenna comprises a PCB base plate, a plurality of antenna elements are distributed radially on the front surface of the PCB base plate, the front surface of the PCB base plate is an analog circuit, and the back surface is a digital processing control circuit.The analog circuit comprises a power divider / combiner and a multi-path TR component, and the digital processing control circuit comprises an SPI control interface, a wave control circuit, a power supply and a modulation circuit.The application superimposes the windowed beam forming algorithm and the traditional beam forming superposition processing technology, overcomes the disadvantage that the main and side lobe suppression of the circular ring antenna array is relatively low, greatly reduces the false target false alarm probability, adopts the circular ring array + phased array technology to realize the X-band intelligent antenna, does not need a motor rotating device, adopts full digital beam forming, and has faster scanning speed, higher reliability, various scanning modes, can realize the beam pointing large-angle instantaneous movement, and overcomes the inertia disadvantage of mechanical scanning.

A method and system for calibrating and cohering at least one radar antenna in receive (RX) mode and transmit (TX) mode includes performing RX mode calibration on the at least one radar antenna using a radio frequency (RF) far-field calibration source, and using the RF far-field calibration source for each of the at least one radar antenna to calibrate an RF phase Φ RXn operating the at least one radar antenna with the at least one near-field antenna in an RX mode to determine a plurality of RX mode phases for the at least one radar antenna and the at least one near-field antenna; operating the at least one radar antenna with the at least one near-field antenna in a TX mode to determine a plurality of TX mode phases for the at least one radar antenna and the at least one near-field antenna; and deriving a TX mode calibration phase as a function of the determined RX mode phase and the determined TX mode calibration phase.

For example, an antenna array can comprise a multitude of antenna elements arranged in a configuration that provides a predefined array factor including a main beam between a first angle and a second angle; a first sidelobe (SL) region between the first angle and a third angle, including one or more first SL peaks below a predefined array factor value; a second SL region between the second angle and a fourth angle, including one or more second SL peaks below the predefined array factor value; and a third SL region between the third angle and a fifth angle, including one or more third SL peaks above the predefined array factor value.and a fourth SL area between the fourth angle and a sixth angle, which includes one or more fourth SL peaks above the predefined array factor value.

The present application belongs to the field of SAR radar ground receiving, and relates to an airborne SAR bunching working mode adaptive system and an observation area determination method. The present application designs and implements an airborne SAR bunching working mode adaptive system and an observation area determination method, which comprises a three-coordinate radar, an antenna, a SAR radar receiver six-degree-of-freedom adaptive platform, an upper computer, a lower computer, and a power supply module. Through the operation of the system, the automatic identification of the airborne SAR bunching working state and working mode on the ground can be completed. Through the comparison of the collected parameters and the typical signal characteristics under the airborne SAR bunching working mode, it can be automatically determined whether the airborne SAR is started, whether it is in the bunching working mode, and the corresponding observation area. At the same time, the present application proposes an observation area determination method based on the above adaptive system, which can continuously, dynamically and in real time determine the working state and observation area under different airborne SAR bunching working modes.

This invention provides an adaptive radar antenna accuracy maintenance mechanism, relating to the field of automatic radar antenna installation technology. The accuracy maintenance mechanism can extend and retract in tandem with the deployment and retraction mechanism. When the array frame is deployed, the accuracy maintenance mechanism can form a flexible, unidirectional tension state, providing load-resistant damping for the radar antenna mounted on the array frame. Under wind-induced load fluctuations, it reduces the overall deformation of the radar antenna, improves the overall rigidity of the array, maintains the accuracy of the radar antenna, and enhances the wind resistance stability of the radar antenna. Furthermore, the accuracy maintenance mechanism is installed independently of the deployment and retraction mechanism, facilitating disassembly, assembly, and overall maintenance.

Disclosed is a radar antenna having an antenna and a waveguide that are coupled using a jig on which a plurality of alignment pins are arranged, and thus minimizing tolerance during assembly. The disclosed radar antenna comprises: an alignment jig having a plurality of alignment pins; a circuit board having a plurality of first alignment holes through which the plurality of alignment pins penetrate, and being stacked on the upper surface of the alignment jig; a waveguide having a plurality of second alignment holes through which the plurality of alignment pins penetrate, and being stacked on the upper surface of the circuit board; and an antenna having a plurality of third alignment holes through which the plurality of alignment pins penetrate, and being stacked on the upper surface of the waveguide.

The invention relates to the technical field of radars, in particular to a protective radar radome structure for a 5G base station, and the structure comprises an annular pedestal which is fixed on a base station support; the supporting mechanism is arranged on the periphery of the annular base, and one side of the supporting mechanism is detachably connected with the annular base; the shell mechanism comprises an outer shell, a protective shell and an inner shell which are sequentially arranged from outside to inside; the buffer mechanism is mounted on the annular base, is arranged between the supporting mechanism and the shell mechanism and is used for absorbing external impact vibration, and the annular base, the buffer mechanism and the shell mechanism form a protection space for wrapping an antenna; according to the device provided by the invention, when external impact acts on the shell, dual buffering of damping energy consumption matched with elastic resetting can be formed, so that the vibration amplitude can be quickly attenuated, a large amount of impact energy can be absorbed, and signal offset caused by continuous vibration of the antenna is avoided.