Comparison of numerical and analytical solutions for radar cross sections of random rough surfaces with full wave solutions

摘要

New unified full wave solutions for the horizontally and vertically polarized backscatter cross sections of random rough surfaces are compared with published numerical and analytical solutions. For the purpose of these comparisons the (one dimensionally) rough surface height autocorrelation functions are assumed to be Gaussian, the medium below the rough interface is assumed to be perfectly conducting. For the full wave analysis, the rough surface is regarded as an ensemble of patches of random rough surfaces with arbitrary orientations and the total backscatter cross section is obtained by averaging over the random slopes of the ensemble of patches. It is shown that the full wave results for the backscatter cross section remain stationary over a wide range of patch sizes.