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采用矩量法 -共轭梯度 -快速富立叶变换 (MOM- CGM- FFT)的混合技术来研究三维均匀介质和非均匀介质目标的散射问题。该方法是以等效电流作为未知函数建立积分方程 ,用 MOM将之转化为线性代数方程组 ,应用 CGM- FFT进行求解。由于在计算中采用了 CGM- FFT技术 ,降低了所需计算机内存和 CPU时间 ,可以有效地处理电大尺寸三维目标的散射。所计算出的数据和解析结果相比较 ,吻合较好。结果证明 ,该方法适应性广 ,是一种求解三维电磁散射问题的简单途径。
The hybrid technique of moment method-conjugate gradient-fast Fourier transform (MOM-CGM-FFT) is used to study the scattering of objects in three-dimensional homogeneous and inhomogeneous media. In this method, an integral equation is established based on the equivalent current as an unknown function, which is transformed into a linear algebraic equation set by MOM and solved by CGM-FFT. Due to the CGM-FFT technology used in the calculations, the required computer memory and CPU time are reduced, and the scattering of electrically large three-dimensional objects can be effectively handled. The calculated data and analytical results compared to better agreement. The results show that this method has wide adaptability and is a simple way to solve the three-dimensional electromagnetic scattering problem.