A HYBRID METHOD FOR CALCULATION OF SCATTERING CHARACTERISTICS OF OBJECTS ABOVE A ROUGH SURFACE

An iterative hybrid method is considered combining the Kirchhoff approximation and the multilevel fast multipole algorithm (MLFMA) is studied for electromagnetic scattering from three-dimensional (3-D) object above a two-dimensional (2-D) random dielectric rough surface. In order to reduce computational costs, some types of speed calculations were used. First, it is used to speed up calculations of electromagnetic field in far field approximation (FAFFA) of the process of interaction between the rough surface and the object. Secondly, based on the mechanism of scattering on a rough surface, and derived a rule for moderately rough surface bistatic scattering, which can further increase the speed of iteration. Compared with traditional methods, a hybrid the method of procedure is sufficient for analysis scattering of 3-D object above random rough surfaces.

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