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Calculation of the Field Distribution Near Electrically Large Nurbs Surfaces with Physical-Optics Method

This paper presents a new set of formulas to compute the field distribution near an electrically large conductor modeled by non-uniform rational B-spline (NURBS) surfaces using physical optics (PO) method. Stationary phase method is applied to calculate the PO integral on the rational Bezier Surface. Results obtained by these formulas and by traditional PO method using triangle-modeling technique agree well, which show the accuracy and efficiency of this method.