Research On E-Band Radar Front-End Integration And Imaging Technology

With the development of science and technology,millimeter wave radar is widely used.The millimeter wave radar works in the millimeter wave frequency band,has the volume small,the mass light and the spatial resolution high characteristic,compared with the infrared,the laser radar penetrates the fog,the smoke,the dust the ability to be strong,can all-weather work.The main advantages of MMW radar are:(1)small antenna diameter,narrow beam,easy to detect small targets(2)large bandwidth,high range resolution,easy to get accurate target tracking and identification ability.(3)high Doppler frequency,good detection and recognition ability for slow targets and vibration targets(4)good anti-stealth performance.Millimeter-wave radar has been widely used in both military and civil fields because of its advantages.In this paper,the E-band millimeter-wave radar front-end hardware integration design,software debugging,MATLAB simulation and imaging algorithm is aimed to complete a millimeter-wave radar system prototype design work.This paper introduces the research background and significance,as well as at home and abroad in recent years,to 77 GHZ millimeter wave radar research present situation,this paper introduces the basic principle of radar,introduces the linear frequency modulation continuous wave(LFMCW)radar has many advantages,and the range of linear frequency modulation continuous wave radar was deduced in detail and speed measuring principle of foreshadowing for subsequent radar signal processing section.Secondly,based on the 77 GHz mmWave SoC,this paper carries out the integrated design of mmWave radar hardware,software configuration and debugging,and designs the waveguide-microstrip probe transition structure to test the transceiver performance of the mmWave radar front-end,and the test results meet the requirements.Then,the design and simulation of the 77 GHz Doerff-Chebyshev microstrip array antenna are carried out in this paper.The design of the microstrip array from the patch element to the microstrip line array and then to the microstrip surface array is derived and calculated in detail step by step.Based on these parameters,modeling,simulation and optimization are carried out in HFSS.Finally,the microstrip array antenna is integrated with the mmWave radar front end and its performance is tested.Finally,this paper mainly expounds the radar signal processing algorithm,introduces the basic fast Fourier transform(FFT)and windowed signal processing theory,and compares the signal accumulation.Then MATLAB is used to simulate the LFM continuous wave ranging algorithm.Finally,the BP imaging algorithm of synthetic aperture radar is described,and the BP imaging algorithm is verified by the data collected from the field of radar.The imaging results are matched with the actual scene.