An efficient high frequency method to compute electromagnetic scattering of large 3D target on rough surface

Physical optics, shooting bouncing ray method and image theory are combined to rapidly compute the electromagnetic scattering from electrically large three-dimensional target on a dielectric rough surface where the reflection from the rough surface is modified by a roughness coefficient. In this hybrid approach, only the target is modeled. The proposed method can achieve good accuracy with very little computation resources for the composite scattering problem.