介质周期结构频率选择特性有限元法分析  

FEM Method Analysis for the Frequency Selective Characteristics of Dielectric Periodic Structure

作　　者：冯奎胜[1] 谢春健[1] 许家栋[1] 

机构地区：[1]西北工业大学电子信息学院,西安710072

出　　处：《微波学报》2008年第1期26-28,39,共4页Journal of Microwaves

基　　金：航空科学基金(05F53032)

摘　　要：采用有限元方法分析了平面波入射时介质周期结构的频率选择特性。截取一个完整的周期单元,内部应用有限元(FEM)方法计算;采用理想匹配层(PML)吸收边界、周期边界、入射边界相结合的方法对无限空间进行截断。几种边界条件的联合应用大大简化了开放空间问题的计算,保证了计算精度。算例结果与理论值符合较好,表明有限元方法在分析此类问题中的正确性和有效性。In this paper, the frequency selective characteristics of dielectric periodic structures for the oblique incidence of a plane wave are analyzed by FEM method. The interior region, treated using the FEM, is truncated to a single periodic unit cell; the combination of PML, periodic boundary and incident boundary extraordinarily simplified the calculation of the open space problems. The results are agreed with the theoretic ones. It shows that the analysis method in the paper is proper and effective.

关 键 词：频率选择表面 介质周期结构 有限元法 理想匹配层 

分 类 号：TN011[电子电信—物理电子学] TU399[建筑科学—结构工程]