电大尺寸物体电磁场问题的修正离散卷积法

MODIFIED DISCRETE CONVOLUTION METHOD FOR EM PROBLEM OF ELECTRICALLY-LARGE GEOMETRY

该文在将离散卷积法(DCM)公式化的基础上,通过修改迭代矩阵,使其Frobenius范数趋于零,得到一种新的迭代矩阵,形成了修正离散卷积法.计算结果表明,该方法在存贮量和迭代计算量方面与DCM相仿,但收敛范围更广.适用于电磁辐射与散射问题,尤其适用于电大尺寸的有限周期结构电磁散射.

On the basis of the discrete convolution method (DOM), a modified discrete convolution method (MDOM) is proposed by zeroizing the Frobenius norm of the iterative matrix. The storage space and the multiplicative operations of MDOM are similar to those of DOM, but the convergence of the former is more stable than that of the latter. The MDOM is suitable for the electromagnetic scattering or radiation of an electrically-large body, especially for the scattering of the finite periodic structure.