相控阵馈源反射面天线在星载SAR中的应用  

Application of Phased Array Feed Reflector Antenna in Spaceborne SAR

作　　者：王楠 郎宇 禹卫东 倪江 郑明洁 WANG Nan;LANG Yu;YU Weidong;NI Jiang;ZHENG Mingjie(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094

出　　处：《航天器工程》2024年第4期11-17,共7页Spacecraft Engineering

摘　　要：5米S频段合成孔径雷达(S-SAR)卫星是一个采用相控阵馈源反射面天线体制的SAR卫星,从5米S-SAR天线技术要求出发,阐述了采用相控阵馈源反射面天线体制的理由,介绍了该种天线的工作原理、设计方法和性能特点。给出了天线系统组成和部分典型的实测结果。相控阵馈源反射面天线的创新点在于,该种天线是相控阵天线和反射面天线两种技术体制的融合,兼具相控阵天线可靠性高、波束控制灵活和反射面天线易实现大口径、轻量化、高收纳比的特点,在一些应用场合可以实现资源和效能的最优化平衡。对相控阵馈源反射面天线的特点做了说明,以期为该技术路线后续发展完善提供参考。The 5m S-SAR satellite is a SAR satellite that adopts phased array feed reflector antenna system.Starting from the technical requirements of 5-meter S-SAR antenna,this article elaborates on the reasons for adopting phased array feed reflector antenna system,and introduces the working principle,design method,and performance characteristics of this antenna.The article provides the composition of the antenna system and some typical measured results.The main innovation of phased array feed reflector antenna lies in the fusion of phased array antenna and reflector antenna.This structure combines the characteristics of high reliability,flexible beam control of phased array antenna,and easy implementation of large aperture,lightweight,and high storage ratio of reflector antenna.In some application scenarios,it can achieve the optimal balance of resources and efficiency.This article explains the characteristics of phased array feed reflector antennas,in order to provide reference for the subsequent development and improvement of this technology route.

关 键 词：相控阵馈源 反射面天线 星载合成孔径雷达 

分 类 号：TN82[电子电信—信息与通信工程]