ABSTRACT
Several natural surfaces are rough in varying degrees, and this roughness affects the propagation and scattering of electromagnetic waves. This chapter begins with a one-dimensional (1-D) rough surface scattering problem. It later discusses electromagnetic wave scattering by a 2-D random rough surface. The idea can be extended to dielectric rough surfaces. Although the method used in the chapter is the tapered wave integral equation formulation and its solution by the method of moments, the problem has also been solved using a finite- difference time-domain (FDTD) approach and finite element method. The benefits of using FDTD include: matrix inversion is eliminated; time-domain response is readily available; and scattering intensities can be obtained simultaneously for a range of frequencies. The method yields a system of linear algebraic equations that can be solved using a direct sparse symmetric matrix inversion.
