| 时域有限差分法中电磁场的吸收边界条件 |
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| 引用本文： | 徐涵,常文蔚,银燕. 时域有限差分法中电磁场的吸收边界条件[J]. 计算物理, 2003, 20(4): 326-330 |
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| 作者姓名： | 徐涵 常文蔚 银燕 |
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| 作者单位： | 国防科技大学理学院,湖南,长沙,410073;国防科技大学理学院,湖南,长沙,410073;国防科技大学理学院,湖南,长沙,410073 |
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| 基金项目： | 国家自然基金(No.10085002)和国家高技术惯性约束聚变主题资助项目 |
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| 摘 要： | 吸收边界条件在时域有限差分法计算电磁场中有着广泛的应用,从吸收边界所要满足的条件出发,将Lindman吸收边界条件推广,得到了便于计算的简化形式.两维数值模拟结果表明:以各种角度向左或右传播的p极化和s极化电磁波在边界面上的反射率均低于0.5%.
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| 关 键 词： | 时域有限差分 吸收边界条件 |
| 文章编号： | 1001-246X(2003)04-0326-05 |
| 收稿时间： | 2002-05-21 |
| 修稿时间： | 2002-05-21 |
Absorption Boundary Condition of the Electromagnetic Wave in the Finite-difference Time-domain Method |
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| XU Han,CHANG Wen-wei,YIN Yan. Absorption Boundary Condition of the Electromagnetic Wave in the Finite-difference Time-domain Method[J]. Chinese Journal of Computational Physics, 2003, 20(4): 326-330 |
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| Authors: | XU Han CHANG Wen-wei YIN Yan |
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| Affiliation: | Science Institute, National University of Defence and Technology, Changsha 410073, China |
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| Abstract: | The Lindman's absorption boundary condition, which has been widely used in the FDTD method, is generalized to a special form suitable to the electromagnetic field calculation from the starting point of the absorption principle. Our 2D numerical simulations indicate that the P-polarized and S-polarized electromagnetic waves with a wide varity of incident angles can be well absorbed by left and right boundaries. The reflectivity of the electromagnetic energy at either boundary is less than 0.5%. |
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| Keywords: | time domain finite difference absorption boundary condition |
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