互耦效应下端射阵机载雷达STAP方法研究  

The Study on STAP Method for End-Fire Array Airborne Radar with Mutual Coupling Effect

作　　者：李永伟 谢文冲[1] LI Yong-wei;XIE Wen-chong(Radar Weapon Application Engineering Military Key Research Laboratory,Air Force Early Warning Academy,Wuhan,Hubei 430019,China)

机构地区：[1]空军预警学院雷达兵器运用工程军队重点实验室,湖北武汉430019

出　　处：《电子学报》2020年第6期1091-1098,共8页Acta Electronica Sinica

基　　金：国家自然科学基金项目(No.61102169)。

摘　　要：互耦效应是阵列天线一个固有的重要属性,而端射阵天线由于其特殊的主波束指向以及抑制栅瓣所要求的小阵元间距,其阵列间存在的互耦效应比侧射阵更加严重.本文首先分析了互耦效应对端射阵天线方向图的影响,构建了存在互耦效应下的天线方向图模型;然后给出了考虑互耦效应的杂波模型并分析了互耦对端射阵机载雷达杂波谱以及STAP(Space-Time Adaptive Processing)性能的影响;最后提出了一种基于杂波协方差矩阵重构的互耦效应补偿方法.计算机仿真验证了所提方法的有效性.Mutual coupling effect is an important and intrinsic property of array antenna.Because of its special main beam pointing and the small element spacing required to suppress the grating lobes,the mutual coupling effect of end-fire array antenna arrays is much more serious than that of side-fire array.In this paper,the influence of mutual coupling effect on the pattern of end-fire array is analyzed,and the pattern model of end-fire array with mutual coupling effect is constructed.Then the clutter model considering mutual coupling effect is given and the influence of mutual coupling on the clutter spectrum and STAP(Space-Time Adaptive Processing)performance of end-fire array airborne radar is analyzed.Finally,a mutual coupling effect compensation method based on clutter covariance matrix reconstruction is proposed.The computer simulation verifies the effectiveness of the proposed method.

关 键 词：互耦效应 端射阵 杂波模型 协方差矩阵重构 互耦补偿 

分 类 号：TN959.73[电子电信—信号与信息处理]