FVTD Analysis of Infinite Plane Greating

Abstract

This paper is concerned with a finite volume time domain (FVTD) analysis for the plane wave scattering by an infinite plane grating. This method is based on the volume integrations of the Maxwell's eqations with respect to small rectangular solid cell. The electromagnetic fields in this are expressed in term of the tangential electromagnetic fields on the surfaces of the cells, and the latter field components are given by the interpolation of the former fields of the adjacent two cells. The advantage of the present method is that the impositions of the boundary coudition are easy. The PML absorbing boundary condition and periodic condition are used in this paper. The numerical results show that the present method provides us precise values as for transmitted power.