Abstract
In this paper a new hybrid method is used to solve the electromagnetic scattering from a 2-D PEC target under 1-D random rough surface based on multipath scattering strategy and equivalence principle. In this procedure, the Kirchhoff approximation (KA) and the physical optics (PO) Method are applied to calculate equivalent currents on the rough surface and PEC target respectively. The mutual coupling between rough surface and target is then obtained by multipath scattering strategy and Huygens equivalence principle. The results of KA-PO method is compared with conventional method of moment (MoM) for two different target shapes. The results of KA-PO method are in good accuracy with MoM results except near grazing observation angles and also shows that using KA-PO method can greatly reduce computational time. The effect of the object size and ground loss also studied by using KA-PO method in this paper.
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