Analysis of scattering from a 3-D doubly periodic cavity array using iterative FEM

Abstract: In this paper, we present the formulation of the iterative finite element method for the analysis of scattering from a three-dimensional doubly periodic cavity array. The single unit cell is discretized with the triangular prismatic volume elements and the electric field intensity is expanded with the edge-based basis functions. The periodicity is incorporated in the Green's function and…