摘要
利用复射线近轴近似法和集合射线法,可以十分简便地分析天线罩的电磁传输特性和散射特性。本文以二维圆柱形天线罩为例,分析了介质罩对罩内雷达天线性能的影响;计算了天线罩引起的传输系数和角跟踪性能的变化,以及天线罩的附加雷达散射截面;讨论了射线参量及天线、天线罩参量对分析计算精度的影响。数值结果表明,这种分析方法可以显著地简化天线罩优化设计,并可适用于其它多种型式的天线罩。
EM transmission and scattering characteristics of radome may Conveniently be analyzed by complex ray paraxial approximation and collective ray methods. 2-D cylindrical radomes are analyzed and calculated, including radome transmission coefficient, radar angular track property and radar cross-section of radomes, as well as the effect of ray parameters and antenna-radome parameters on computation accuracy. It is shown that this method can be used to simplify optimization designs for many kinds of radomes.
基金
电子科学研究院资助项目
南昌飞机制造公司资助项目
关键词
天线罩
电磁散射
复射线
近似法
Antenna
Radome
Electromagnetic scattering
Complex ray
