利用UTD修正的MoM-PO混合算法研究

介绍了利用矩量法(MoM)和物理光学(PO)混合方法处理复杂线体结构的电磁散射问题，提出利用pulse基函数对线电流进行展开，使得处理复杂线体结构问题变得简化，并推导出一般的矩阵方程。然后针对PO在阴影区域失效等问题，利用UTD(一致性几何绕射)对该简化模型结构下的PO区域电流进行了修正，使得其应用范围得到扩展、计算精度得到提高。文中的实例结果与传统的MoM很好的一致，从而说明了该方法的有效性和精确性。

A hybrid method of MoM and PO Modified by UTD

In this paper, the scattering by arbitrarily shaped objects with wire antenna is firstly studied by the hybrid method of MoM and PO. The current on wire antenna is expanded as a set of series by using pulse base functions, a simplied model and the general matrix equation are obtained. To overcome PO's invalidition to the shadow of object, UTD is adopted to modify the current on the PO region in the simplied model. This leads the application scope of the hybrid method is expanded and its precision is improved. Finally, two examples for scattering of large electric object with thin antenna are given to illustrate the accuracy and efficiency of the presented method.