Multipath EM Scattering Modeling of Targets on Deck

In this work we present an approximate technique for high-frequency EM scattering and ISAR image modeling of targets on deck, where major scattering mechanisms from both the isolated target body and the multipath interaction between the target and the deck are included. The target body is geometrically modeled using facets and wedges. Physical optics (PO) method is used to calculate the facet scattering, and the incremental length diffraction coefficients (ILDC) technique is applied to calculate the wedge diffraction. The multipath interaction between the target and the deck is considered by summing up the scattering components from four major radar-target-deck interaction paths. Typical computational results for radar cross section (RCS) and ISAR images are presented and compared with those from the direct scattering path only, demonstrating the validity and usefulness of the current technique