Some recent developments in iterative techniques for solving electromagnetic boundary value problems

The objective of this paper is to present a brief review of recent developments in a class of iterative techniques for solving electromagnetic boundary value problems. The iterative algorithm discussed herein is based on the minimization of the norm of the boundary condition error on a body whose scattering properties are of interest. It is shown that different choices of variational functions in the minimization process lead to different iteration schemes whose convergence properties can vary considerably. To illustrate this point, three different variational functions are chosen to demonstrate their applications in solving three different types of electromagnetic boundary value problems. Some observations on the use of iterative techniques for solving scattering problems with multiple incidence angles are included in the paper. Copyright 1987 by the American Geophysical Union.