A COORDINATE-SPECTRAL METHOD FOR ROUGH-SURFACE SCATTERING

In this paper, we deal with the time-harmonic scattering by one-dimens ional rough surfaces separating two homogeneous and isotropic media. T he method is based on a rigorous integral formalism. The unknown of th e integral equation is projected onto a Fourier basis while the equati on itself is sampled as in a classical method of moments. The accuracy is tested against both other methods and experimental results. One of the main interests in choosing a Fourier basis lies in the ability to solve rigorously the scattering of a p polarized incident beam by a s hallow metallic rough surface. The role of the surface waves is accura tely taken into account and phenomena such as enhanced backscattering are well described. With this method, one can consider that the gap be tween the domain of validity of perturbation theories and the domain o f practical use of rigorous methods is filled.