Implementation of radiation boundary conditions in the finite element analysis of electromagnetic wave propagation

Radiation boundary conditions are formulated which permit the simulation of two-dimensional electromagnetic wave phenomena with the finite-element method using conventional elements over a bounded domain. Implementation of such boundary conditions preserves the symmetry of the global stiffness matrix with all the advantages that this implies, including economy of storage and solution. A number of wire-antenna systems have been modeled with this technique in a finite-element computer program called FEAST. The results demonstrate good agreement with published reference data