宽带相控阵雷达各模块幅相失真对成像的影响  

Effect of wideband phased array radar module amplitude and phase error on radar imaging

作　　者：齐涛[1] 刘丹[1] 

机构地区：[1]中国航天科工集团公司二院23所,北京100854

出　　处：《航天电子对抗》2008年第3期19-21,共3页Aerospace Electronic Warfare

摘　　要：宽带LFM信号作为一种广泛应用于宽带相控阵雷达系统中的信号,在实际应用中一般可采用Stretch处理的方法,实现高距离分辨成像,并大大减少数据采集难度。但它需要很大的瞬时带宽,传统上认为当瞬时带宽较大时,系统的幅相频率特性难以满足要求。通过对实测数据的分析,发现当有源相控阵模块较多时,由于模块之间幅相失真的综合作用,虽然单个模块存在较大的幅相误差,但最终雷达成像性能仍满足设计要求。LFM signal is a signal that applies extensively to wideband phased array radar,and in practice it can be processed by using Stretch method, which can achieve high range resolution profile, and enormously reduce the difficulty of data gather. But it need very large instantaneous bandwidth. It is considered that when instantaneous bandwidth is relative large,the system＇s amplitude-frequency and phase-frequency character can＇t satisfiy the demand. The practice data is dealed with and it is found that when the module number is much, because of the counteract of amplitude and phase error between modules, the radar capability can still satisfy design demand.

关 键 词：宽带雷达 一维距离像 幅相误差 

分 类 号：TN958.92[电子电信—信号与信息处理]