FAST ITERATIVE SOLUTION METHODS IN ELECTROMAGNETIC SCATTERING

Experiments on Iterative Methods and the Fast Multipole Method in Electromagnetic Scattering Calculations

We describe the iterative solution of dense linear systems arising from a surface integral equation of electromagnetic scattering. The complex symmetric version of QMR has been used as an iterative solver together with a sparse approximate inverse preconditioner. The preconditioner is computed using the topological information from the computational mesh. The matrix-vector products are computed...

Electromagnetic Scattering Using the Iterative Multiregion Technique

In this work, an iterative approach using the finite difference frequency domain method is presented to solve the problem of scattering from large-scale electromagnetic structures. The idea of the proposed iterative approach is to divide one computational domain into smaller subregions and solve each subregion separately. Then the subregion solutions are combined iteratively to obtain a solutio...

An iterative solution of the two-dimensional electromagnetic inverse scattering problem

A new method, based on an iterative procedure, for solving the two-dimensional inverse scattering problem is presented. This method employs an equivalent Neumann series solution in each iteration step. The purpose of the algorithm is to provide a general method to solve the two-dimensional imaging problem when the Born and the Rytov approximations break down. Numerical simulations were calculat...

Iterative Regularization Methods in Inverse Scattering

We consider the problem of reconstructing the shape of an acoustic or electromagnetic scatterer from far eld measurements of the scattered wave corresponding to one incident time harmonic wave in the resonance region. This problem is di cult to solve since it is nonlinear and severely ill-posed. The characterization of the Fr echet derivatives, which has been accomplished some years ago by Kirs...

Numerical Solution of Sawada-Kotera equation by using Iterative Methods