Title :
A Monte-Carlo FDTD technique for rough surface scattering
Author :
Hastings, Frank D. ; Schneider, John B. ; Broschat, Shira L.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
A Monte-Carlo finite-difference time-domain (FDTD) technique is developed for wave scattering from randomly rough, one-dimensional surfaces satisfying the Dirichlet boundary condition. Both single-scale Gaussian and multiscale Pierson-Moskowitz surface roughness spectra are considered. Bistatic radar cross sections are calculated as a function of scattering angle for incident angles of 0, 45, 70, and 80 degrees measured from the vertical. The contour path FDTD method is shown to improve accuracy for incident angles greater than 45 degrees. Results compare well with those obtained using a Monte-Carlo integral equation technique
Keywords :
Gaussian processes; Monte Carlo methods; electromagnetic wave scattering; finite difference time-domain analysis; radar cross-sections; Dirichlet boundary condition; Monte-Carlo FDTD technique; bistatic radar cross sections; contour path FDTD method; finite-difference time-domain; multiscale Pierson-Moskowitz surface roughness spectra; randomly rough one-dimensional surfaces; rough surface scattering; scattering angle; single-scale Gaussian surface roughness spectra; Electromagnetic scattering; Finite difference methods; Integral equations; Radar scattering; Rough surfaces; Sea surface; Surface acoustic waves; Surface roughness; Surface waves; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
