608 results about "Radar antennas" patented technology

The embodiment of the invention provides a simulated target reflectivity factor quantitative generation method for weather radar far-field region calibration, and is applied to the technical field of weather radar calibration. The method comprises the following steps: acquiring radar antenna and emission parameters, a distance between a target simulator erection point and a radar, a simulation target distance, and a transmit-receive radiance ratio of a target simulator; according to a pre-constructed simulation target equivalent sectional area quantitative model, based on the radar antenna and emission parameters, the distance between the target simulator erection point and the radar, the transmit-receive radiance ratio of the target simulator and the simulation target distance, calculating to obtain a simulation target equivalent sectional area; and calculating to obtain a radar reflectivity factor expected value according to the equivalent sectional area of the simulation target, the radar antenna and emission parameters and a weather radar equation. In this way, a simulated target reflectivity factor for weather radar far-field region calibration can be quantitatively generated.

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, which relates to the technical field of the radar system, discloses a swash plate machine phase-sweeping radan installation angle adaptive correction method comprising the following steps: acquiring three-axis attitude angle data of an installation reference surface, and synchronously acquiring azimuth angle rotation data of a radar antenna; based on the three-axis attitude angle data of the installation reference surface, establishing a coordinate transformation matrix from a radar antenna coordinate system to an inertial coordinate system, and mapping the three-axis attitude angle data of the installation reference surface to the inertial coordinate system; obtaining a beam scanning conical surface deviation angle according to the coordinate transformation matrix and azimuth angle rotation data of the radar antenna; generating antenna attitude correction according to the beam scanning conical surface deviation angle; and inputting the antenna attitude correction quantity into an antenna driving controller, adjusting the attitude of two axes of pitching and orientation of the antenna, and compensating the beam scanning conical surface deviation. According to the method, the precise coordinate transformation matrix and the angle difference compensation model are established, and the inertial measurement unit and a closed-loop feedback control mechanism are combined, so that the self-adaptive real-time correction of the mounting angle is realized.

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.

The invention relates to a construction technology of a radar radome, in particular to a construction and positioning technology of a high-precision radar radome, and particularly relates to a construction method of a spherical radar radome. Comprising the steps that 1, an internal positioning tool is built and used for providing basic positioning and supporting of the spherical radar radome; 2, building an external positioning tool based on the internal positioning tool, and arranging the external positioning tool according to a preset spherical contour to form a spherical frame; and step 3, building the radar radome based on the external positioning tool, and completing building of the spherical radar radome. According to the method, through three-dimensional software modeling and precise calculation of the size of the positioning tool in the tool, precise positioning of the whole positioning tool is achieved; by means of the double-layer positioning tool, high-precision positioning and stable supporting of the radar radome are achieved, the manufacturing process is effectively simplified, the positioning precision and the manufacturing efficiency are improved, and meanwhile the manufacturing cost is reduced.

A broadband 4T4R automobile radar antenna disclosed by the present invention comprises an upper-layer radiation plate and a lower-layer feed plate, the upper-layer radiation plate is provided with a plurality of horn mouths and a plurality of EBG choke grooves, the horn mouths and the EBG choke grooves are distributed at intervals in a staggered manner, each horn mouth is internally provided with a plurality of radiation slots at unequal intervals, and the upper-layer radiation plate is provided with a plurality of feed slots. A waveguide feed port is arranged on the lower surface of the lower layer feed panel; compared with the prior art, in order to ensure the antenna gain, the choke design in the EBG form is adopted between the antenna units, the transmission of surface waves is effectively restrained, and the isolation degree between the antenna units is improved; the horizontal plane realizes a good gain effect by accurately optimizing taper pin distribution of the slot array and amplitude-phase excitation of the feed network, and has better sidelobe envelope directional diagram characteristics; and the width of the lobe on the horizontal plane is adjusted by adjusting the inclination angle of the horn mouth, so that the width reaches 63 + / -3 degrees, and the gain effect is effectively improved.

The invention discloses a liquid metal-based radar antenna array surface non-uniform heat flux density heat dissipation structure, which comprises an antenna array surface, a radiation unit is mounted on the front surface of the antenna array surface, a liquid cooling plate is mounted on the back surface of the antenna array surface, and a T / R assembly on the antenna array surface is connected with the liquid cooling plate; a gradient porous structure formed based on a three-period minimal curved surface is welded at the bottom of the liquid cooling plate, and the liquid cooling plate is sealed with the liquid cooling shell through a sealing piece; the liquid cooling shell comprises a liquid inlet channel, a liquid outlet channel and a liquid cooling cavity, and liquid metal as cooling liquid exchanges heat with the liquid cooling plate through the liquid inlet channel and the liquid cooling cavity and then flows out through the liquid outlet channel. According to the invention, the liquid metal with high thermal conductivity is adopted as the cooling liquid and is combined with the gradient porous structure formed based on the three-period minimal curved surface, so that the problem of non-uniform heat flux density of the seeker detection radar in the flight process of a hypersonic aircraft is effectively solved, and compared with conventional gas-liquid two-phase flow heat dissipation, the stability is more excellent; and while heat exchange is enhanced, metal consumables can be saved, and the consumption of coolants can be reduced.

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 relates to a near-ground different-angle wind field laser wind measurement radar antenna and a wind measurement laser radar, and relates to the technical field of laser wind measurement, and the near-ground different-angle wind field laser wind measurement radar antenna comprises an optical lens, a channel seat, a flange adjusting assembly and an optical fiber connector. An objective lens group composed of a plurality of lenses is arranged in the optical lens, one end of the channel seat is connected with the optical lens, a flange seat mounting plate is arranged at the other end of the channel seat, the flange adjusting assembly comprises a middle flange assembly and a plurality of peripheral flange assemblies, and the middle flange assembly is arranged in the middle of the flange seat mounting plate. An optical fiber connector is arranged at the end part of the middle flange assembly to form a middle view field channel; the multiple peripheral flange assemblies are arranged at different positions of the lower portion of the flange base mounting plate in a scattered mode, the end of each peripheral flange assembly is provided with an optical fiber connector, multiple peripheral view field channels are formed, and the measurement effect of the near-ground wind field can be improved.

The invention discloses a pointing calibration method and device of a radar antenna, equipment and a storage medium. The method comprises the following steps: mechanically scanning the sun in a preset azimuth angle and electronically scanning the sun in a preset pitch angle by using a phased array radar, and determining a signal-to-noise ratio of a sun noise signal received by each scanning point in a preset range; the preset range comprises a preset azimuth angle and a preset pitch angle, and takes a theoretical sun position as a center; determining the actual sun position based on the signal-to-noise ratio of the sun noise signal received by each scanning point in the preset range; calculating a target correction value of the radar antenna according to the theoretical sun position and the actual sun position; and performing pointing calibration processing on the radar antenna based on the target correction value. According to the method, through mechanical scanning of the phased array radar in the azimuth dimension and electronic scanning of the phased array radar in the pitching dimension, the efficiency of pointing calibration of the radar antenna is improved.

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 invention provides a large-span planar antenna housing containing foam supporting columns and a manufacturing method thereof, and relates to the technical field of radar antennas. According to the antenna housing, the foam supporting column is additionally arranged in the middle of the housing body to serve as a supporting structure, the rigidity and strength of the antenna housing are improved, collapse and contraction of the antenna housing are reduced, the thickness of the housing body is reduced, the distance between the wall face of the antenna housing and an internal antenna unit is reduced, and therefore the overall section space is reduced, and the space utilization rate 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 utility model relates to the technical field of antenna rotary tables, and discloses a radar antenna rotary table with a limiting device, which comprises an antenna rotary table body, a shell arranged on one side of the antenna rotary table body, a base mounted at the bottom of the shell, and a mounting plate mounted at a movable end at the top of the shell, a limiting assembly used for clamping and fixing a radar is arranged on one side of the top of the mounting plate. The limiting assembly comprises two fixing plates, a motor and a prompting mechanism, an output shaft of the motor is controlled to rotate, at the moment, the output shaft drives a bidirectional lead screw to rotate, two rubber plates are close to a square base of the radar, at the moment, the base of the radar can be clamped and limited, operation is easy and convenient, the radar can be disassembled and assembled very conveniently, and the practicability is high. And the two rubber plates are used for clamping the radar base, stable clamping force can be provided, the radar is prevented from shifting or shaking in the using process, and stable operation of the radar is ensured.

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 silicon-based integrated device for synchronously measuring microwave frequency and an angle of arrival and a measuring method. The light source is used for emitting light carriers to the input end of the double-parallel Mach-Zehnder photoelectric intensity modulator, and the two radar antennas arranged at intervals receive microwave signals to be measured and send the microwave signals to the double-parallel Mach-Zehnder photoelectric intensity modulator. The double-parallel Mach-Zehnder photoelectric intensity modulator loads a microwave signal to be measured onto an optical carrier to generate two paths of optical carrier microwave signals and sends the two paths of optical carrier microwave signals to the first instantaneous frequency measurement unit and the second instantaneous frequency measurement unit and the arrival angle measurement unit, and rough frequency measurement, fine frequency measurement and arrival angle measurement of the optical carrier microwave signals are carried out respectively. A single structure is adopted, synchronous and efficient measurement of the frequency and the arrival angle of a radar microwave signal is achieved, the detection efficiency is remarkably improved, the technical problem of simultaneous measurement of the microwave frequency and the arrival angle with on-chip integration, high precision, light weight, low power consumption and powerful functions is solved, the practicability of the system is improved, and the application range of the system is widened.

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 invention relates to an airborne equipment angular displacement-free damping device of a multi-stage connecting rod mechanism. The airborne equipment angular displacement-free damping device comprises a supporting platform, and a switching bottom plate and a mounting platform are arranged above the supporting platform; a plurality of connecting rod mechanisms are connected between the switching bottom plate and the supporting platform, the axial directions of rotating pin shafts on the connecting rod mechanisms are all the Y-axis directions, and at least one connecting rod mechanism is a parallelogram mechanism; a plurality of shock absorbers are connected between the mounting platform and the supporting platform; a plurality of groups of guide pin assemblies are connected between the adapter bottom plate and the mounting platform, each guide pin assembly comprises a guide pin and a guide sleeve which are mutually and coaxially inserted, and the axial directions of the guide pins and the guide sleeves are Y-axis directions. The method is suitable for high-precision equipment such as an airborne photoelectric pod, a radar antenna and an inertial navigation system of an airplane or an unmanned aerial vehicle, the influence of vibration on imaging precision, measurement precision and aiming precision can be effectively reduced, and the stability and reliability of the whole system are improved.

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.

The invention discloses a coplanar waveguide-rectangular waveguide horizontal conversion feed structure and a waveguide slot antenna, and belongs to the technical field of radar antennas. The structure mainly comprises a rectangular waveguide conversion section of which one end is connected with a rectangular waveguide and the other end is connected with a coplanar waveguide conversion section, and the rectangular waveguide conversion section is used for converting a dominant mode signal transmitted by the coplanar waveguide into a dominant mode signal transmitted by the rectangular waveguide; and one end of the coplanar waveguide conversion section is connected with the rectangular waveguide conversion section, the other end of the coplanar waveguide conversion section is connected with the coplanar waveguide feeder line, and the coplanar waveguide conversion section is used for performing impedance conversion on the input impedance of the rectangular waveguide conversion section and matching the impedance with the characteristic impedance of the coplanar waveguide feeder line. According to the invention, effective conversion of microwave or millimeter wave signals between the coplanar waveguide and the rectangular waveguide can be realized without vertical transition, and the antenna has the characteristics of simple structure, low profile, simple process and low loss.

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 invention relates to the technical field of radar measurement, and discloses a radar antenna measurement system, which comprises a radar antenna subarray, a wave controller, a synthesizer, a signal receiving channel and a processor, and is characterized in that the radar antenna subarray is used for transmitting an electromagnetic wave detection signal to a target and receiving a first echo signal reflected by the target; the wave controller is used for performing phase change processing on the phase of part of the first echo signal to obtain a processed echo signal; the radar antenna subarray is also used for transmitting the processed echo signal and the echo signal which is not processed by the wave controller in the first echo signal to the synthesizer; the synthesizer is used for synthesizing the received echo signal to obtain a second echo signal and transmitting the second echo signal to the signal receiving channel; the signal receiving channel is used for performing analog-to-digital conversion processing on the second echo signal to obtain a first digital echo signal and transmitting the first digital echo signal to the processor; the processor is used for measuring and determining position information of the target according to the first digital echo signal. According to the invention, hardware resources of the radar system are saved.