抛物面反射天线的空域瞬态极化特性研究  

Study on the characteristics of spatial instantaneous polarization of parabolic reflection antenna

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

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《电波科学学报》2009年第1期126-131,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金重点项目(60736006);国家自然科学基金青年科学基金项目(编号:60802078);国家973重大基础研究发展规划(No.51314);"十一五"总装备部武器装备预研项目(51309060305)

摘　　要：以天线的空域指向为变化因素来分析研究抛物面天线的空域极化特性,采用表面电流法计算了天线远场的主极化和交叉分量,进而利用空域极化比分布,瞬态极化投影集等空域瞬态极化描述子研究了雷达坐标系下不同方位角和俯仰角下典型抛面天线极化特性的变化规律。通过计算和分析比较,结果表明,在空域指向的不同位置,抛物面天线的极化特性服从一定规律变化,这对抛物面天线空域极化特性的应用提供了理论依据和支持。The spatial polarization characteristic of parabolic reflection antenna is researched in this paper. The co-polarization and cross polarization for antenna in the far field is computed by surface current method. The polarization variation regular of parabolic reflection antenna in different azimuthal and elevational direction of radar coordinate system is researched basing on the analysis of the spatial instanta- neous polarization descriptors such as the distribution of spatial polarization degree and instantaneous polarization projection vector etc. By calculation and simulation analysis, the result shows that the parabolic reflection antenna＇s polarization characteristics changes by rule which provides theoretical base and support for the application of the spatial polarization characteristics of the antenna.

关 键 词：抛物面天线 空域瞬态极化特性 瞬态极化描述子 交叉极化分量 

分 类 号：TN820.11[电子电信—信息与通信工程] TN957.5