天线空域极化特性的表征及分析  

Description and analysis of spacial polarization characteristics of antenna

作　　者：罗佳[1] 王雪松[1] 李永祯[1] 肖顺平[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》2008年第4期620-628,共9页Chinese Journal of Radio Science

基　　金：新世纪优秀人才支持计划项目(NCET-0997);全国优秀博士学位论文专项资助项目(08100101);国家自然科学基金项目(60672033)

摘　　要：在充分诠释天线的空域极化,尤其是空域瞬态极化概念的基础上,建立了天线空域极化特性的表征框架,给出了天线空域的经典极化描述子和瞬态极化描述子。分析了理论正交偶极子天线和实际干扰机天线的空域极化特性;讨论由于天线在空域的极化变化及极化不纯对雷达接收极化损耗的影响,并进行了相应的计算机仿真。结果表明:天线的极化特性在不同空间辐射方向是按一定规律变化的;而且这种变化特性影响着雷达接收损耗、抗干扰性能等各个方面。The description framework of spacial polarization characteristics of antenna is introduced in this paper by interpreting the conception of antenna＇s spacial polarization especially for instantaneous polarization detailedly. Some classical descriptors and instantaneous descriptors are given. The spacial polarization characteristics of theoretical orthogonal dipole antenna and a practical jammer antenna is analyzed. The influence to radar received polarization loss caused by it＇s spacial variety is discussed. Simulation results indicate that antenna ＇s polarization characteristics changes as different radiation direction, and results in the performance of radar, such as the received loss, anti-interference property and so on.

关 键 词：空域极化特性 瞬态极化 接收极化损耗 极化描述子 正交偶极子天线 干扰机天线 

分 类 号：TN95[电子电信—信号与信息处理]