Novel 3D Hybrid FEM-PO Technique for the Analysis of Scattering Problems.

摘要

A novel three-dimensional hybrid Finite Element Method (FEM) and Physical Optics (PO) technique for the efficient analysis of scattering problems is presented. It makes use of FEM for the regions with small and complex features and PO for the analysis of the electrically large objects of the structure taking into account mutual interactions between the FEM domains and the objects analyzed with PO. The hybrid method proposed makes use of an iterative FEM for open region problems that allows the FEM domain to be truncated with a minimum number of unknowns while retaining the original sparse and banded structure of the FEM matrices and also an easy hybridization with other numerical techniques (as PO in this paper). Several numerical results are given showing some of the features of the method.