应用改进的快速偶极子法和特征基函数法分析导体目标电磁散射特性

摘要

An efficient numerical approach is presented to analyze the electromagnetic scattering characteristics from conducting targets based on the Characteristic Basis Function Method (CBFM). Combined with the Improved Fast Dipole Method (IFDM), the matrix-vector product is transformed into an aggregation-translation-disaggregation form, which in turn accelerates the matrix-vector multiplication procedure in the generation of Secondary level Characteristic Basis Function (SCBF) and construction of reduced matrix. The computational time and memory consumption are reduced significantly compared with the traditional method of Fast Dipole Method-Characteristic Basis Function Method (FDM-CBFM) under the equivalent precision. Numerical results demonstrate that the proposed method is accurate and efficient.%该文提出了一种分析导体目标电磁散射特性的有效数值方法，该方法基于特征基函数法，将改进后的快速偶极子法与之相结合，把远场组间的矩阵矢量积转化为聚集-转移-发散的形式，从而加速次要特征基函数和缩减矩阵构建过程中的矩阵矢量相乘的速度。与传统的快速偶极子法结合特征基函数法相比较，在同等精度下，计算时间和内存消耗都得到了有效地缩减，数值结果证明了该方法的精确性和有效性。