利用Van-Atta阵列的SAR成像效应影响分析  

Analysis of SAR imaging effect based on Van-Atta array

作　　者：范昌 宋鲲鹏 王俊杰[1] 冯德军[1] FAN Chang;SONG Kunpeng;WANG Junjie;FENG Dejun(School of Electronic Science,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院,长沙410073

出　　处：《空军预警学院学报》2021年第3期184-187,共4页Journal of Air Force Early Warning Academy

摘　　要：鉴于目前Van-Atta阵列能够在广角范围内保持较大的雷达散射截面(RCS),因而在卫星通信和射频识别(RFID)中得到广泛的应用.利用Van-Atta阵列与动态器件引入互连传输线,可以实现宽角度范围内的RCS间歇调制.将这一特性应用到SAR入射信号的调制,实现了多向入射雷达信号的时域幅度间歇调制;经过调制后,在被保护目标位置周围形成多个特征相似的假目标.理论分析和仿真结果表明,基于Van-Atta阵列的时域幅度间歇调制对SAR成像具有一定的影响效应.Van-Atta array can maintain a large radar cross section(RCS)over a wide range of angles,so it is widely used in satellite communication and radio frequency identification(RFID).The utilization of Van-Atta ar-ray and the introduction of dynamic devices to interconnected transmission lines can realize RCS intermittent mod-ulation over a wide range of angles.This paper applies this characteristic to the modulation of synthetic aperture radar(SAR)incident signal to realize the time domain amplitude intermittent modulation of multi-direction inci-dent radar signals.After modulation,multiple false targets with similar characteristics are formed around the pro-tected target position.Theoretical analyses and simulation results show that the time domain amplitude intermit-tent modulation based on Van-Atta array has a certain effect on SAR imaging.

关 键 词：间歇式 Van-Atta阵列 合成孔径雷达 振幅调制 

分 类 号：TN975[电子电信—信号与信息处理]