摘要
本文运用有限差分技术,构造出非均匀各向异性媒质曲边网格的五点差分方程,借助不变性测试方程(MEI)这一新概念,成功地计算了电大尺寸任意厚度涂覆媒质的导体柱的RCS特性.在截断边界上采用MEI方程,使得截断边界十分接近散射体表面,从而使计算占用计算机的内存大大减少,同时与矩量法相比,还显著缩短了计算时间,本文在微机上计算的电大尺寸柱体周长达120个波长,是一般方法无法比拟的.
Finite difference equation for curved meshes filled with anisotropic inhomogeneous media is derived in this paper. The concept of measured equation of invariance is used for calculating RCS of electrically large conducting cylinder coated with the media of arbitrary thickness. The MEI equation is applied to the truncation boundary, which makes the truncation boundary very close to the scattering surface, thus reduces the memory requirements and saves CPU time compared with the MoM. The circumference of the cylinder dealt with arid calculated on the PC accesses 120 wavelengths, which is almost impossible to deal with by other methods.
出处
《微波学报》
CSCD
北大核心
1996年第1期1-8,41,共9页
Journal of Microwaves
基金
国家自然科学基金资助项目
关键词
不变性测试方程
电大尺寸
涂覆介质导体柱
Measured equation of invariance, Electrically large dimension, Coated conducting cylinder
