An efficient approach for computing the RCS of electrically large targets

This paper presents a method for the computation of the monostatic radar do ss section (RCS) of electrically large conducting objects modeled by a new kind of parametric surfaces based on trigonometric functions using physical optic (PO) technique. The PO integral on the parametric surfaces is calcul ated using nine point Gaussian integration. The geometric description using the parametric surfaces is simpler than that using NURBS surfaces. Good ag reement with geometric optics (GO) predictions at a millimeter-wave frequen cy is obtained. RCS results show that the parametric surfaces for the descr iption OF objects can he used in RCS computation.