493 results about "Radar antennas" patented technology

The invention provides a multipath fusion phased array radar antenna unit coordinate determination method and system, and the method comprises the steps: obtaining an antenna array surface power distribution diagram, recognizing the boundary and geometric center of an array, and planning a spiral and cross-shaped composite sampling path; on the planned sampling path, collecting phase data at a plurality of inclination angles and frequencies; based on the signal-to-noise ratio and the angle correction factor, carrying out adaptive weighted fusion calculation on the adjacent point phase difference under multiple conditions; establishing an overdetermined equation set by using the fused phase difference, and iteratively solving the accurate coordinates of the antenna unit through two rounds of weighted least squares; and establishing a drift model to perform dynamic compensation, and performing real-time calibration by using a unit with determined coordinates as a reference point. According to the invention, through a multi-angle and multi-frequency redundancy measurement strategy and in combination with a signal-to-noise ratio-based adaptive weighting algorithm, environmental interference can be effectively identified and suppressed. Even in a complex electromagnetic environment, the system can still keep stable measurement precision.

The invention belongs to the technical field of radar beam control, and discloses a beam control system and method applied to a satellite-borne phased array radar antenna array plane. A hierarchical control architecture is adopted, computing resources are reasonably distributed, the beam conversion time is shortened, and universality is achieved; according to the invention, a main and standby circuit cross hot backup, series connection and parallel connection combined form is adopted at a sub-array wave control unit level, so that the number of output signals of a wave control extension set is reduced, and the system cost is reduced; component-level temperature amplitude phase compensation can be achieved, the component wave control chip collects temperature in real time and sends the temperature to the wave control unit through a BIT channel, and the wave control unit completes calculation compensation; according to the invention, subarray-level deformation phase compensation can be realized, and the wave control unit realizes deformation phase compensation at the subarray level according to the subarray deformation quantity measured by the deformation measurement system.

Disclosed is a radar antenna which has a shielding space corresponding to each antenna of an antenna body by using an accommodation hole of a shielding member to prevent mutual coupling between antennas. The disclosed radar antenna comprises an antenna body which has a first surface and a second surface and in which a plurality first slot groups are formed to be spaced apart from each other on the first surface, and a shielding member which is stacked on the first surface of the antenna body and in which a plurality of accommodation holes are formed to respectively overlap the plurality of first slot groups.

For example, a radar antenna may include a Transmit (Tx) antenna array configured to transmit a plurality of Tx radar signals; and a Receive (Rx) antenna array configured to receive a plurality of Rx radar signals based on the plurality of Tx radar signals, the Rx antenna array is orthogonal to the Tx antenna array, wherein a first array of the Tx antenna array or the Rx antenna array includes a first sub-array and a second sub-array parallel to the first sub-array, wherein a sub-array spacing between the first sub-array and the second sub-array is shorter than a length of a second array of the Tx antenna array or the Rx antenna array.

The invention provides a non-uniform sampling rotation MIMO super-resolution imaging method, system and product, and the method comprises the steps: synthesizing a virtual aperture based on collected radar data, and building a coordinate system based on the virtual aperture; calculating position information of the radar antennas in the coordinate system, and screening all the radar antennas based on a preset step length to obtain effective virtual antennas; acquiring target distance information based on the acquired radar echo signal; constructing a rotating super-resolution dictionary based on the target distance information and the position information of the effective virtual antenna, and generating a local super-resolution image based on the rotating super-resolution dictionary; and performing coordinate transformation and data splicing on each local super-resolution image to generate a global super-resolution image. Compared with a traditional angle estimation algorithm, the method provided by the invention can greatly improve the angle resolution capability, enables the main lobe of the radar to face the target at any time through the rotatable characteristic of the platform, enables the monitoring area of the radar to be enlarged, improves the target detection capability, and meanwhile, the radar has the advantage of flexible deployment.

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 present invention discloses a modeling method for a non-rotational airborne radar radome, comprising: performing surface configuration and solid modeling on the non-rotational surface airborne radar radome to obtain a reconstructed digital model of the non-rotational airborne radar radome; and generating a frequency selective surface of the non-rotational airborne radar radome based on the digital model of the non-rotational airborne radar radome. The present invention realizes the precise creation of the digital model of the non-rotational airborne radar radome, so that the finally designed radome product can achieve the initially designed electrical performance index in the actual application environment.

The invention belongs to the technical field of radar antennas, and particularly relates to a radar antenna multidirectional adjusting base and a control method thereof.The radar antenna multidirectional adjusting base comprises a pitching fixing base, a rotating disc and an auxiliary braking assembly, the rotating disc is arranged on the pitching fixing base, and the rotating disc is driven by a motor to have the freedom degree of rotating around the axis of the rotating disc on the pitching fixing base; the auxiliary braking assembly comprises an electromagnet arranged on the second support, a plug pin and limiting rods arranged on the first support, the attraction end of the plug pin and the electromagnet are in magnetic attraction fit, and the insertion end of the plug pin is inserted between the limiting rods and matched with the limiting rods to limit the rotating disc on the pitching fixing base. A reset spring is arranged between the plug pin and the second support, the reset spring provides acting force opposite to the attraction force of the electromagnet for the plug pin, and the adjusting base can stably limit the radar antenna in a long-time non-working state for a long time. And violent collision between the turntable and the pitching fixing seat when the radar antenna is not controlled to tilt can be prevented.

The invention discloses a clutter generation method and device, and relates to the technical field of radar signal processing, and the specific technical scheme comprises the steps: obtaining the position information of a radar antenna, the position information of a clutter scattering block, and the antenna beam information; calculating phase information corresponding to the clutter scattering block according to the position information of the radar antenna and the position information of the clutter scattering block; calculating a backscattering coefficient of the clutter scattering block by using the antenna beam information and the position information of the clutter scattering block; calculating the amplitude of a clutter scattering block by using the backscattering coefficient and the phase information; constructing a transfer function of a clutter scattering block by using the amplitude, the backscattering coefficient and the phase information; performing convolution processing on the transfer function and the radar transmitting signal to obtain a clutter echo signal corresponding to the clutter scattering block; and accumulating the clutter echo signal corresponding to each clutter scattering block to obtain a clutter echo signal corresponding to the radar. Therefore, the accuracy of clutter simulation is improved.

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.

The invention relates to the field of robot dogs, and particularly discloses a robot dog-based dam termite detection device which comprises a robot dog, a moving plate is arranged on the abdomen of the robot dog in a lifting manner, a spherical sealing tank is arranged on the moving plate, blocking liquid is arranged in the spherical sealing tank, and a sealing opening is formed in the position, away from the abdomen of the robot dog, of the spherical sealing tank. An anti-collision ring is arranged on the hole wall of the sealing opening, a round spring steel sheet attached to the inner wall of the spherical sealing tank is arranged in the spherical sealing tank, a plurality of holes are formed in the round spring steel sheet, a connecting rod is fixedly connected to the circle center of the round spring steel sheet, and a containing frame is arranged at the bottom end of the connecting rod. A telescopic sealing pipe is fixedly connected to the connecting position of the connecting rod and the sealing opening, a radar antenna module is arranged in the containing frame, a radar host module is arranged on the back of the robot dog, and an adjusting mechanism for adjusting the inclination angle of the radar antenna module is arranged on the containing frame. The robot dog has the effect of improving the stability of the ground penetrating radar installed on the robot dog.

A radar antenna with a flushing function, comprising an antenna body forming an antenna horn and a flushing fluid channel configured to receive flushing fluid. The flushing fluid channel opens at its end into an annular gap for discharging the flushing fluid into the interior of the antenna body.

The present application relates to a waveguide antenna, a waveguide antenna and a radar antenna, comprising: a metal body, the top surface of which extends in the horizontal direction; the power divider network is arranged in the metal body and comprises a plurality of power divider branches, each power divider branch is bent and extends along the horizontal direction, and a first polarization direction is formed at the tail end of each power divider branch; the antenna units extend from the interior of the metal body to the top surface of the metal body along a normal direction perpendicular to the horizontal direction, and the antenna units are connected to the tail ends of the power divider branches in a one-to-one correspondence manner through the polarization direction switching units; wherein the polarization direction switching unit configures the polarization direction emitted from the antenna units as a second polarization direction perpendicular to the first polarization direction, and the plurality of antenna units are arranged at intervals along the first polarization direction.

For example, a radar apparatus may include a mismatch calibrator configured to determine antenna mismatch calibration information to calibrate an antenna mismatch of a radar antenna array comprising a plurality of receive (Rx) antennas; and a processor to process radar Rx data, and to generate radar information based on the radar Rx data and the antenna mismatch calibration information, the radar Rx data is based on Rx radar signals received at the plurality of Rx antennas.

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

The invention relates to a radar antenna device (1) for a vehicle (20), comprising a composite window pane (2) and at least one radar device (13) configured to transmit and / or receive a radar beam (6). The at least one radar device (13) comprises a corresponding antenna unit (5) and a corresponding amplifier unit (12). The amplifier unit (12) is configured to provide an electrical drive signal (8) to the antenna unit (5) and / or to receive an electrical echo signal (9) from the antenna unit (5). The invention provides that the antenna unit (5) is arranged in the composite window pane (2) of the vehicle (20), the amplifier unit (12) is arranged on a surface of the composite window pane (2), and the antenna unit (5) and the amplifier unit (12) are spatially separated from each other and are electrically conductively connected to each other via a connecting element (11) arranged in the composite window pane.

A radio frequency uncrewed aerial system (RF-UAS) able to conduct in-flight power measurements in the far-field region of operational antennas, such as radar antennas, by employing a unique 3-axis gimbal control strategy to maintain continuous polarization alignment with the device under test, such as an antenna system. This RF-UAS system avoids distortions typically caused by RF probe misalignment and effectively utilizes the full dynamic range of an onboard RF transceiver. In at least one embodiment, the disclosed RF-UAS is used to capture co-polar and cross-polar radiation patterns of a weather radar such as an X-band weather radar or PAR. The disclosed dynamic gimbal scan algorithm accurately measures the antenna radiation pattern of the antenna under test (AUT) without needing subsequent (posterior) probe correction.

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.

Disclosed is a non-contact rotary joint structure that provides communication between the moving radar antenna and subsystems in radar applications and includes two RF channels with a gap in order to ensure that the rotating and fixed parts are non-contact.

The present invention relates to the field of radar antenna technology and discloses a method for optimizing the design of a high-gain thermoelectromagnetic wave-transmitting structure. The method includes parametric modeling of the thermoelectromagnetic wave-transmitting structure and the radar antenna structure to extract the design variables to be optimized from the geometric parameters. The parametric model is reconstructed based on the design variables, material properties, and service conditions. Based on a sequential coupling simulation method, thermal simulation is first performed, followed by electromagnetic simulation, to perform thermoelectromagnetic coupling analysis on the design domain of the electromagnetic wave-transmitting structure. The actual far-field radiation gain of the radar antenna is calculated. An optimization model is established, and the design variables are iteratively updated using a Gaussian regression model and a genetic algorithm. The optimal values ​​of the design variables are obtained to obtain the optimal electromagnetic wave-transmitting structure. The present invention improves the average far-field radiation gain of the radar antenna in the forward direction, shortens the design cycle of the thermoelectromagnetic wave-transmitting structure, reduces the cost of trial and error, enhances the adaptive cruise control capability of vehicles, reduces product R&D costs, and shortens the development cycle.

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.

The present invention relates to a low-metal antenna and its design method. A carbon powder slurry is applied to the surface of an antenna element to form a carbon powder slurry coating. The antenna element is a semiconductor radiating element. The disclosed antenna proposes a typical alternative material for manufacturing radar antennas, which can reduce the metal content of the radar antenna in a composite mine detector system, thereby effectively reducing the radar antenna's impact on the primary field of the electromagnetic induction module, improving system sensitivity and dynamic range, and achieving beneficial effects in electrical performance, quality, and cost.

The invention provides a conformal phased-array antenna, a system and a beam control method, and the antenna comprises a conformal carrier which is disposed on a vehicle body structure, and the structure of the conformal carrier is matched with the vehicle body structure; the antenna array comprises a plurality of antenna units distributed in an array and is arranged on the first surface of the conformal carrier; the chip array comprises a plurality of radio frequency chips which are distributed in an array mode, the radio frequency chips are arranged on the second face of the conformal carrier and connected with the antenna unit, the antenna unit and the chip array are arranged on the conformal carrier matched with a vehicle body structure, the coverage range of radar antenna beams can be enlarged, and therefore the coverage range of the radar antenna beams can be enlarged. The multi-target tracking performance of the radar in a complex traffic environment is significantly improved, and the safety of intelligent driving is improved.

The present invention belongs to the field of radar antenna technology, specifically an ultra-low sidelobe, high-gain metal waveguide slot antenna with a surface modulation structure. The antenna of the present invention consists of a radiating waveguide with a slot on a wide side, plate reflectors installed on both sides of the radiating waveguide at a certain angle, and a feeding waveguide tightly attached to the bottom of the radiating waveguide; wherein, a row of metal cylinders are respectively provided on the upper surface of the radiating waveguide and on both sides of the middle radiating slot, and the metal cylinders are fixed to the PMI foam strips on the narrow side of the waveguide; the arrangement of the reflectors and metal cylinders can be used to correct the E-plane radiation pattern of the metal waveguide antenna, thereby increasing the gain while minimizing the sidelobes. The array impedance bandwidth can reach 2%, the E-plane sidelobes are almost ‑22 dB, and the H-plane sidelobes are almost ‑30 dB. The arrangement is relatively compact and the reliability is extremely high.