【摘要】 本文基于渐近波形估计（ＡＷＥ）技术和区域分裂法（ＤＤＭ）快速预测有限长三维拄体ＲＣＳ的频率响应．首先采用区域分裂法结合频域有限差分（ＰＤＦＤ－ＤＤＭ）计算柱体表面等效电流和磁流在某一给定频率展开的Ｔａｙｌｏｒ级数，然后通过Ｐａｄ逼近将Ｔａｙｌｏｒ级数转化为有理函数，由此可获得柱体在任一频率入射波照射下的表面等效电流和磁流，进而计算出ＲＣＳ频率响应特性．本文结果和文献结果吻合较好，证明了本文方法的正确性，另外相对于直接采用ＦＤＦＤ－ＤＤＭ法而言，计算效率得到了显著的提高．更多还原

【Abstract】 The Domain Decomposition Method (0DM) in conjunction with the asymptotic waveform evaluation (AWE) technique is applied to obtain the radar cross-section (RCS) of a 3-D cylinder over a frequency band. The equivalent electric current and magnetic current on the surface of the cylinder are firstly expanded in Taylor’s series over a given frequency and solved by FDFDDDM . 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 frequency within a desired frequency band, which are used to calculate the RCS of the cylinder. A good agreement between our results and the results from reference verifies the validity of this technique. In addition, the computational efficiency is considerably improved compared with the traditional FDFD-DDM.更多还原