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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Direct Field and Mixed Potential Integral Equation Solutions by Fast Fourier Transform Accelerated Multilevel Green's Function Interpolation for Conducting and Impedance Boundary Objects
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Direct Field and Mixed Potential Integral Equation Solutions by Fast Fourier Transform Accelerated Multilevel Green's Function Interpolation for Conducting and Impedance Boundary Objects

机译：传导和阻抗边界对象的快速傅里叶变换加速多层格林函数插值的直接场和混合势积分方程解

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摘要

A fast solver based on multilevel La-grange interpolation of homogenous space electric and magnetic field Green's functions is discussed. Broadband applications are possible due to a wavelength adaptive multilevel scheme. By an FFT-technique, the pertinent translation operators are diagonalized. An impedance boundary condition (IBC) is employed considering electric and magnetic currents for the approximate treatment of non-metallic objects. The common mixed-potential integral equation and a direct field formulation are both discussed. In general, the direct field formulation leads to more accurate results in conjunction with interpolated Green's functions, especially for low frequency problems. The efficiency of the algorithm is shown in several numerical examples.
机译：讨论了基于均匀空间电场和磁场格林函数的多级拉格朗日插值的快速求解器。由于波长自适应多级方案，宽带应用是可能的。通过FFT技术，将相关的转换算符对角化。考虑到电流和磁电流，采用阻抗边界条件（IBC）近似处理非金属物体。讨论了共同的混合势积分方程和直接场公式。通常，直接场公式结合插值格林函数可产生更准确的结果，尤其是对于低频问题。几个数字示例显示了该算法的效率。

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