【摘要】 二维周期渐变微波吸收体由金属基体和涂敷有耗介质构成。有耗介质的厚度、介电常数和磁导率是影响吸收体电磁散射特性的主要因素,因此有必要分析这些参数对吸收体电磁散射特性的影响。根据吸收体的二维周期性结构特点,把分析介质参数对吸收体雷达散射截面(RCS)的影响简化成分析介质参数对涂敷导体二面角RCS的影响。利用矩量法给出涂敷导体二面角的RCS随介质参数变化的计算例子,并结合天线阵列技术算出最佳介质厚度时吸收体的RCS.更多还原

【Abstract】 Varying absorber of two-dimensional periodic is composed of a metal base and a coating of lossydielectric.The thickness of lossy dielectric,permitivity,and permeability are the main factors affecting the electromagnetic scattering of absorber.This paper is a discussion of these parameters.In light of the two-dimensional periodic characteristic of the absorber,the effect of dielectric parameter on the scattering of double dihedrals of coding conduct other than the whole absorber was analyzed.Examples of computation of the scattering of double dihedrals of coding conduct which changes in accordance with the dielectric parameter were illustrated by using the moments method.The radar cross section(RCS)of absorber was also computed by using the moments method and technology of antenna array when the dielectric was at the most appropriate thickness.更多还原