Pulse beam wave scattering from one-dimensional very rough surfaces: experimental and numerical studies

Presents analytical and experimental studies on the time-dependent scattering from one-dimensional rough surfaces. The scattering of a Gaussian beam pulse from a rough surface is investigated analytically using the tangent plane approximation. The two-frequency mutual coherence function is then derived from the scattered held using a stationary phase method. The pulse broadening and lateral spread for different surface roughnesses and observation ranges are obtained from the analytical results. In the experimental study, the scattering of a wide-band pulse from very rough surfaces is investigated. The frequency coherence functions as a function of observation angles are derived from scattering cross sections obtained from controlled scattering experiments using a wide-band millimeter wave scatterometer (75-100 GHz). Numerical Monte Carlo simulations are compared with the experimental results showing good agreement