Numerical Simulation of Conical Diffraction of Tapered Electromagnetic Waves fromRandom Rough Surfaces and Applications to Passive Remote Sensing

摘要

A new tapered wave integral equation method was derived to simulate the conicaldiffraction of electromagnetic waves from rough surfaces. Both the ful1 matrix inversion and the banded matrix iterative approaches are developed. By using the principle of reciprocity and energy conservation, all four Stokes parameters are calculated for polarimetric passive remote sensing of rough surfaces. We show in this paper that for a moderately rough surface, the third Stokes parameter can be as high as 1200K. The tapered wave integral equation approach can deal with a rough surface with a large slope. The new method presented in this paper is compared with the previously published plane wave integral equation method and the extended boundary condition method. Very good agreement is obtained. Unlike the plane wave integral equation method and the extended boundary condition method, the tapered wave integral equation method does not have the kinks imposed by Floquet models and it requires a shorter surface length in most applications. (MM).