一维相控阵振幅-相位单脉冲测角特性分析  

Analysis of Angle Estimation Using Monopulse in One Dimensional Phased Array

作　　者：何文安[1] 张家林[1] 保谦[1] 

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2010年第1期59-64,共6页Modern Navigation

摘　　要：研究了一维相控阵天线系统幅度加权、和差波束形成机理，分析了和差波束形成器前高频幅相不平衡、和差波束形成器后中频幅相不平衡对振幅-相位和差单脉冲测角特性的影响，给出了数字接收机角误差提取方法。仿真结果表明，高频幅度不平衡使测角灵敏度下降，瞄准轴偏移；高频相位不平衡使瞄准轴有显著偏移；中频幅度不平衡使定向斜率曲线偏离理想斜率；中频相位不平衡对测量结果影响不大。The amplitude Weighting and ∑-- △ beam forming of one dimensional phased army antenna are studied. The effects of amplitude-phase unbalance on angel estimation characteristic are analyzed. A digital method of angle error extraction is provided. The simulation results show that the amplitude unbalance of RF results in the angle extraction sensitivity declined and axis offset, the phase unbalance of RF causes large axis offset, the amplitude unbalance of IF results in the sensitivity of angel estimation deteriorated, and the phase unbalance of IF has little effects on angle estimation.

关 键 词：一维相控阵单脉冲 幅相不平衡 数字中频处理 

分 类 号：TN821[电子电信—信息与通信工程]