一种计算多面体目标RCS的等效边缘电磁流公式

A Novel Formula of Equivalent Edge Current for Calculating RCS of Polyhedral Structure

本文将Ando计算平面目标物理光学（PO）场的等放边缘电磁流（POEEC）公式推广到能够计算复杂多面体目标的PO场，并对之修正，使该公式仅存在一个奇异点。这种POEEC和具有很少奇异点仅能计算边缘绕射场的等效边缘电磁流（PTDEEC）之和得到了能够计算散射总场且具有良好同性的GTDEEC。用导出的GTDEEC公式计算了正方体和圆柱的双站RCS，计算结果与实验和其它方法的结果吻合得相当好，证实了GTDEEC公式的正确性。

Formula of equivalent edge currents for calculating physical optical (PO) field (POEEC) of planar objects given by Antio et al. is extended to calculate PO field of polyhedral structures. In addition, the extended POEEC is modified to reduce the singularity down to only one. The summation of the new POEEC and the less singularity PTDEEC derived by Michaeli gives the GTDEEC which can be used to calculate the total field of polyhedral structures. Bistatic RCS of a cube and finite cylinder are calculated using GTDEEC presented in the paper. The calculated results are in good agreement with those from measured and the other methods. This fact confirms the validity of the formula based on GTDEEC.