一种星载平台SAR的波束展宽方法  

A Beam Broadening Method of Spaceborne Platform SAR

作　　者：王欢[1] 熊武 徐海洋 WANG Huan;XIONG Wu;XU Hai-yang(Air Force Engineering University,Xi’an 710051,China;Unit 94907 of PLA,Nanchang 330013,China;Unit 31511 of PLA,Beijing 100085,China)

机构地区：[1]空军工程大学,陕西西安710051 [2]解放军94907部队,江西南昌330013 [3]解放军31511部队,北京100085

出　　处：《舰船电子对抗》2019年第5期26-28,共3页Shipboard Electronic Countermeasure

基　　金：国家自然科学基金项目,项目编号:61601502

摘　　要：星载合成孔径雷达(SAR)在高分辨宽带测绘方面应用得越来越广泛,但是均匀加权的发射波束宽度不足以实现测绘场景幅宽和合成孔径长,针对这一问题,通过阵列天线对空间合成场相位进行优化调整使合成方向图与目标方向图无限逼近,提出了采用两步最小二乘处理进行波束展宽的方法,即对目标方向图的空间相位与发射阵列的相位加权值进行联合优化,最后通过仿真验证了所提方法的有效性。Spaceborne synthetic aperture radar(SAR)is more and more widely used in high resolution wide-band mapping,but the uniform weighted beam width is not enough to realize the width of the mapping scene and the length of synthetic aperture.In view of this problem,this paper optimizes and adjusts the phase of space synthesis field by means of array antennas,so that the synthetic pattern and target pattern are infinitely approached,puts forward the method of beam broadening adopting two-step least squares,that is,the joint optimization of space phase of target pattern and phase weighted value of emission array is performed,finally verifies the effectiveness of the proposed method through simulation.

关 键 词：波束形成 合成孔径雷达 星载平台 波束展宽 

分 类 号：TN957.51[电子电信—信号与信息处理]