Full wave vector electromagnetic scattering from two-dimensional arbitrary random rough surfaces

A solution to scattering from two-dimensional (2D) surfaces with arbitrary roughness based on the extended boundary condition method (EBCM) is presented. The bistatic scattering cross section (SCS) is obtained from the superposition of the upgoing Floquet modes. This method places no limitation on the roughness scale of the surface, and produces both co-pol and cross-pol components of fields and scattering cross sections. The method is validated for the small roughness regime by comparing the simulation results with an existing solution using the small perturbation method (SPM) for the co-pol components. Comparison of results shows very good agreement between these two methods in the validity domain of SPM. Further validations for rougher surfaces and for cross-pol components are currently under-way.