FVTD analysis of electromagnetic wave scattering by rough surface

This paper is concerned with the numerical simulation for the electromagnetic (EM) scattering by a rough surface at a low grazing angle. First scattered electromagnetic fields are computed by the finite volume time domain (FVTD) method, second the field data in the time domain are converted to those in the spectral domain by the discrete Fourier transform (DFT), and finally far fields are computed by use of the Kirchhoff-Huygense theorem. The numerical results are compared with those obtained by other methods as well as with the experimental data.