摘要
给出了研究任意形状的三维各向异性介质目标的电磁散射问题一种混合计算方法。该方法以电场作为未知函数建立频域体积分 -微分方程 ,使用脉冲基函数和点匹配函数的矩量法 (MOM)将之转化为线性代数方程组。在求解过程中应用共轭梯度法 (CGM)和快速富里叶变换 (FFT)相结合的方法降低所需计算机内存和CPU时间。与各向同性和各向异性介质球的计算结果和解析结果及其它文献结果相比较 ,吻合较好。对材料参数为奇异矩阵的介质球的计算结果证明 ,该计算方法兼容性强 。
A mixed method for computing electromagnetic scattering from arbitrarily shaped, three dimensional (3D) anisotropic dielectric bodies is presented. The method is based on a general volume integro differential formulation of the scattering problem, and consists of the numerical method by method of moment (MOM) with pulse basis functions and a Dirac δ testing function. A particular feature of this mixed method is that conjugate gradient method (CGM) and fast Fourier transform (FFT) technique are used for reducing storage and CPU time. The numerical results are validated by comparing the radar cross section (RCS) of isotropic and anisotropic dielectric spheres with those obtained using analytical method or those given in other papers. The capability of the numerical code presented here to deal with cases where the material parameters of the scatterer are given by singular matrices is discussed for two particular examples.
出处
《电波科学学报》
EI
CSCD
2002年第3期209-215,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金资助项目 (6 0 0 710 2 5 )
