A COMBINED FEM/MOM APPROACH TO ANALYZE THE PLANE-WAVE DIFFRACTION BY ARBITRARY GRATINGS

被引:54
作者
GEDNEY, SD [1 ]
LEE, JF [1 ]
MITTRA, R [1 ]
机构
[1] UNIV ILLINOIS,DEPT ELECT & COMP ENGN,ELECTROMAGNET LAB,URBANA,IL 61801
关键词
D O I
10.1109/22.120110
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The diffraction of TE- and TM-polarized plane waves by planar gratings is numerically analyzed using a combined FEM/MoM algorithm based on the generalized network formulation. The interior region, treated using the FEM, is truncated to a single unit cell with the introduction of an exact periodic boundary condition, which is enforced as a natural boundary condition. By employing the finite element method to compute the fields within the periodic structure, gratings of arbitrary cross section and material composition can be efficiently modeled.
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页码:363 / 370
页数:8
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