摘要
为了使角反射器的3dB波束宽度能覆盖合成孔径雷达天线所有模式对应的入射角范围,提出了一种合成孔径雷达角反射器的优化设计方法.首先结合光线追迹和Gordan面元积分法提出一种角反射器雷达截面积的快速计算方法,再通过大量仿真计算得出角反射器3dB波束宽度随棱长比和安置角度的变化规律,最后基于此对目前常规的三条棱边等长型的角反射器进行优化设计,以提高其3dB波束宽度.优化设计计算结果表明卫星HJ-1C,ENVISAT和ALOS在各自入射角范围内,角反射器方位向3dB波束宽度分别增大了6.06°,6.26°和16.00°.
In order to cover all modes′incident angle ranges of synthetic aperture radar′s antenna by the corner reflector ,a kind of optimization design method was proposed .First ,a fast calculation method of corner reflector′s radar cross section was proposed based on the combination of ray tracing and Gordan surface integral method .Then ,laws of corner reflector′s 3 dB widths varying with the edge length ratios and placement angles were drew through plenty of simulation calculations .Finally , corner reflector whose three edge lengths were always equal was optimized by the laws .The results show that the corner reflectors′azimuthal 3 dB widths increase by 6 .06° ,6 .28° and 16 .00° within HJ‐1C ,ENVISAT and ALOS′s incident angle ranges ,respectively .
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2014年第12期53-58,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(40901165)
国家"十二五"民用航天预先研究基金资助项目
测绘地理信息公益性行业专项基金资助项目(20142007)
关键词
合成孔径雷达
角反射器
雷达截面积
棱长比
安置角度
优化设计
synthetic aperture radar(SAR)
corner reflector
radar cross section
edge length ratio
placement angle
optimization design