Electromagnetic scattering from a PEC object above a dielectric rough sea surface by a hybrid PO–PO method

Abstract

In this paper, the electromagnetic scattering from a perfectly electric conducting object above a dielectric sea surface is investigated by an efficient hybrid method combining physical optics (PO) with physical optics (PO). Both the scatterings of an object and the underlying sea surface are calculated by the PO method and the mutual couplings between them are solved by the equivalence principle and multi-path scattering strategy. In numerical simulations, the monostatic and bistatic normalized radar cross-section of the composite model is computed by the proposed method and is compared with that by the conventional method of moments. The results show the hybrid PO–PO method has a good accuracy, presence of PO and can greatly reduce the computational time and memory requirement.