Electromagnetic scattering modeling from Gaussian rough surface based on SPM

摘要

Based on the small perturbation method (SPM), a basic model is established to study the electromagnetic scattering of Gaussian rough surface. By using the small perturbation method, the relationship between scattering coefficient and scattering angle is given when scattering azimuth, incident angle, relative permittivity and relative permeability are changed respectively. Then we find the common points between them so that we can establish the relation model between scattering angle and scattering coefficient. In order to validate the accuracy, the specific parameter values are brought into the established model. The results show that the numerical results are basically the same as the modeling results, and the error is very small. Therefore, when the statistical parameters of the rough surface are determined, a model between scattering coefficients and scattering angles can be established to simplify the calculation of scattering coefficients.