An accurate bistatic scattering center model for extended cone-shaped targets

An accurate bistatic scattering center model for cone-shaped targets is proposed in this paper. The model describes the overall attributes of dominant bistatic scattering centers. It includes not only the sliding scattering centers on the smooth surface and bottom edge, but also the scattering centers induced by creeping waves and traveling waves which are not considered in the previous models. To validate the proposed model, the results based on this model are compared with precise scattered fields computed by the full-wave numerical method, namely the hybrid finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA). Excellent agreement has been achieved. In contrast to the traditional assumption, it is concluded in this paper that the scattering centers of creeping waves and traveling waves are important, and can not be ignored particularly under bistatic mode.