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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。
The use of paraxial approximation method and set ray method can be very simple to analyze the electromagnetic transmission and scattering characteristics of the radome. In this paper, a two-dimensional cylindrical radome is taken as an example to analyze the influence of the dielectric cover on the performance of the radome in the cowl. The variation of transmission coefficient and angular tracking performance caused by the radome and the additional radar cross section of the radome are analyzed. Influence of Ray Parameters, Antenna and Radome Parameters on Analysis and Calculation Precision. Numerical results show that this method of analysis can significantly simplify radome optimization design and can be applied to many other types of radomes.