实测雷达天线的空域极化特性测量及校正  

Measurement and Calibration of Spatial Instantaneous Polarization Characteristics of Practical Radar Antenna

作　　者：戴幻尧[1] 李金梁[1] 李永祯[1] 刘勇[1] 王雪松[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《现代雷达》2010年第7期83-86,91,共5页Modern Radar

基　　金：国家自然科学基金重点资助项目(60736006);国家自然科学基金青年科学基金资助项目(60802078)

摘　　要：以雷达天线极化方向图实测数据为基础,建立了天线极化特性测量模型,通过电磁计算掌握了抛物面天线极化特性的先验知识,分析了实测数据和理想辐射场的主要区别,讨论了实测中天线相位方向图测量误差产生的原因,指出了数据采集频率,信号源频率漂移,相位中心偏移是制约测量精度的主要因素。针对上述误差结合实测数据对相位测量误差进行了校正,结果表明了误差分析的正确性,具有一定的参考价值。Based on the measured polarization pattern data of the radar antenna, the polarization property measurement model is founded. By electromagnetic computation, a priori knowledge of the polarization property of parabolic reflector antenna is learned. The main difference between the real data and theoretic property is analysised. The main reason of phase measurement error is discussed. Data acquisition frequency, frequency-departure of signal source, phase center excursion are point out to be the key factors effect on the measurement precision. The phase measurement error of real data has been calibrated effectively. The validity of research work is demonstrated by processing the real data and it has some application value.

关 键 词：雷达天线 交叉极化 相位方向图 相位误差 空域极化特性 

分 类 号：TN957.2[电子电信—信号与信息处理]