三维散射体宽角度RCS的快速算法

基于渐近波形估计（AWE）技术和区域分裂法（DDM）快速预测有限长三维柱体的单站RCS方向图。首先采用区域分裂法结合频域有限差分（FDFD－DDM）把柱体表面的等效电流和磁流在给定的某一角度展开成Taylor级数，然后通过Pade逼近将Taylor级数转化为有理函数，由此可获得柱体在任一角度入射波照射下的表面等效电流和磁波，进而计算出单站RCS方向图。计算结果表明采用AWE技术得到的结果和直接采用FDFD－DDM法得到的结果吻合较好，同时计算效率得到了很大的提高。

Fast calculation of wide angle RCS of 3-D objects

The Domain Decomposition Method (DDM) in conjunction with the asymptotic waveform evaluation (AWE) technique is applied to predict the mono-static radar cross section (RCS) patterns of a 3-D cylinder. The equivalent electric current and magnetic current on the surface of the cylinder are firstly expanded in Taylor's series over a given angle in FDFD-DDM. Then the Taylor's series are converted to rational functions via Pade approximation and the surface equivalent electric current and magnetic current can be achieved at any angle within a desired angle range, which are used to calculate the mono-static RCS of the cylinder. A good agreement between the results from AWE and the results from FDFD-DDM is observed. Compared with the traditional FDFD-DDM, the computational efficiency is considerably improved.