二维Mur二阶吸收边界条件简化格式的应用

FDTD是计算电磁学最重要的方法之一,而Mur吸收边界条件是其普遍使用的一种边界条件。在二维问题中,二阶Mur吸收边界条件在写成差分格式时,对微分方程进行了变换,使得边界条件的微分方程只含有一阶导数,方便在计算过程中应用。通过理论分析和数值计算,说明了这种吸收边界条件效果显著,并通过线电源的辐射算例加以证明。

Simplified format application of 2D two-rank Mur absorbing boundary condition

Finite difference time domain is one of the most important methods on computational electromagnetics while Mur ABC(absorbing boundary condition) is one of the common used conditions.In 2 dimensional problem,two-rank Mur ABC can be transformed to a new form which contains one rank differential coefficient.This simplification makes the computational process more convenient.Theory analysis and computation example were used to show the notable effect of the form.A computation example of linear electrical radiation resource was testified.