Investigation on back scattering from rough soil surface of layered medium

The electromagnetic scattering from the rough surface of three-layered medium is studied, the formulae of the scattering coefficient for different polarization is derived using the small perturbation method. An exponential distributed rough surface is presented for describing the natural rough soil surface of layered medium, the influence of the permittivity of substrate medium, the permittivity and the mean layer thickness of intermediate medium, the root mean square and correlation length of rough surface and the frequency of the incident wave on the backscattering coefficient of HH polarization are obtained and discussed with numerical implementation.