高分三号卫星C频段多极化有源相控阵天线系统设计  

Design of C-band Multi-polarized Active Phased Array Antenna System for GF-3 Satellite

作　　者：任波[1,2] 赵良波 朱富国 

机构地区：[1]中国电子科技集团公司第十四研究所,南京210039 [2]天线与微波国防科技重点实验室,南京210039 [3]北京空间飞行器总体设计部,北京100094

出　　处：《航天器工程》2017年第6期68-74,共7页Spacecraft Engineering

基　　金：国家重大科技专项工程

摘　　要：高分三号(GF-3)卫星SAR载荷天线是中国首副成功在轨应用的C频段多极化天线,其采用有源相控阵体制,多极化共孔径设计,波束控制灵活,能够实现12种常规工作模式及多种扩展模式。GF-3卫星C频段多极化有源相控阵天线(简称SAR天线)质量占到卫星总质量的46%,工作时最大功耗占卫星能源功耗的60%以上,而其发射功率、带宽特性、方向图等都对成像性能有着至关重要的影响。文章针对GF-3卫星SAR天线C频段、多极化、大带宽、高功耗、高精度、大尺寸、轻量化等特点,介绍了天线系统设计的内容及主要性能结果,可为中国后续SAR卫星有源相控阵天线的研制提供参考。The antenna system of the synthetic aperture radar （SAR）imaging satellite （GF-3）is the first Chinese C-band multi-polarized phased array antenna which is operating on-orbit success-fully.The antenna features characteristics of co-aperture design,multi-polarization,flexibility of beam control,and can achieve twelve general working modes and several extensional modes.As a key equipment of the SAR system,the weight and peak power consumption of the whole system account for more than 46% and 60% of the satellite,respectively.Moreover,the performances of its emitting power,wideband bandwidth and radiation patterns play an important role on the ima-ging performance.The paper presents the design and main performances of the SAR antenna sys-tem for GF-3 satellite to demonstrate its features of C-band, multi-polarization, broad bandwidth,large power consumption,high-precision scanning,large aperture folding and low-weight,which will provide useful guidelines on the design of phased array antenna for Chinese space-borne SAR in the future.

关 键 词：高分三号卫星 合成孔径雷达 有源相控阵天线 C频段 多极化 

分 类 号：TN821.8[电子电信—信息与通信工程]