ABSORBING BOUNDARY-CONDITIONS FOR THE FINITE-DIFFERENCE APPROXIMATION OF THE TIME-DOMAIN ELECTROMAGNETIC-FIELD EQUATIONS
ABSORBING BOUNDARY-CONDITIONS FOR THE FINITE-DIFFERENCE APPROXIMATION OF THE TIME-DOMAIN ELECTROMAGNETIC-FIELD EQUATIONS
复制标题
DOI：
10.1109/temc.1981.303970
复制
发表时间：
1981-01-01
影响因子：
2.1
通讯作者：
MUR, G
中科院分区：
文献类型：
--
作者：
MUR, G
在无界空间中用有限差分技术求解时域电磁场方程时，必须有一种方法来限制计算场的域。这是通过截断网格并在其人工边界处使用吸收边界条件来模拟无界环境来实现的。本文提出了电磁场方程的高吸收边界条件，该边界条件可用于二维和三维构型。数值结果清楚地表明了高吸收边界条件的精度和适用范围。对于二维时域电磁场问题，导出了一个简化的、但同样精确的吸收条件。
When time-domain electromagnetic-field equations are solved using finite-difference techniques in unbounded space, there must be a method limiting the domain in which the field is computed. This is achieved by truncating the mesh and using absorbing boundary conditions at its artificial boundaries to simulate the unbounded surroundings. This paper presents highly absorbing boundary conditions for electromagnetic-field equations that can be used for both two-and three-dimensional configurations. Numerical results are given that clearly exhibit the accuracy and limits of applicability of highly absorbing boundary conditions. A simplified, but equally accurate, absorbing condition is derived for two- dimensional time-domain electromagnetic-field problems.