Research On Scanning And Tracking Control Strategy Of Phased Array Antenna

Since the advent of radar,whether in the military field and civilian field of radar technology requirements are constantly improve,thus modern radar earlier added a lot of function and working mode.This not only requires more detailed and rigorous requirements for radar basic performance indexes,but also becomes more complicated for the use of environmental requirements and structural design requirements.Because of the increasing frequency of use in communication,the antenna size of base stations and mobile devices is becoming smaller and smaller,making it possible for array antennas to be used in various communication devices.In addition,due to the technical requirements of the phase control technology and the continuous changes in the use of the environment,it is necessary to make timely improvements.Plane phased array is based on 6 * 6,design the single beam scanning mode and multiple target tracking work mode,the rapid scanning and four more echo space target tracking problems such as data association;The control circuit is designed to calculate the beam control of the target tracking based on the prediction information.The main work of the thesis is as follows:First of all,combined with the project requirement,the study aims to complete the antenna array yuan for 6 * 6 phased array,in a non-ideal scanning environment,achieve rapid scanning,the azimuth and pitching direction and can capture trace four goals.According to the principle of phased array antenna,the main index of beam shape is analyzed,and the beam direction of the array is simulated by experiment.Secondly,the common wave space arrangement is carried out and the underscan analysis is carried out.According to the space scanning requirements of the project,the scope of the under-scan rate and the scan rate is proposed,and the spatial arrangement of the design meeting the demand wave position is completed.The simulation results show that the proposed method can effectively control the scan area while avoiding the underscan.Thirdly,the tracking filtering algorithm is simulated and analyzed with a large tracking error.Comparison of several common filtering algorithm to analyze its filtering effect,in view of JPDA algorithm scheme to improve the problems of large amount of calculation,get the improved JPDA algorithm for multiple echo environment target track filter.The simulation results show that the improved JPDA algorithm can effectively reduce the computation and realize the tracking of multiple targets accurately.Finally,a beam control system for scanning and multi-target tracking is designed.The relationship between beam pointing and wave control digital computing is studied.Scanning mode,according to the already designed wave configuration,convert it can be used to control the calculation of phase shifter wave digital control and tabulation in the ROM on FPGA,selects the look-up table method to realize the space scanning.In the tracking mode,the design wave control digital computing module is input into the Angle information of the predicted track after filtering,and the output is 6 channels to send the wave control digital to the 6 * 6 antenna array.The control of four beams by time sequence multi-beam forming method is designed.Simulation results demonstrate the effectiveness of the proposed method.