| 一种新的PML构造及其在FDTD方法中的应用 |
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| 引用本文： | 李清亮. 一种新的PML构造及其在FDTD方法中的应用[J]. 电子学报, 2002, 30(9): 1396-1399 |
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| 作者姓名： | 李清亮 |
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| 作者单位： | 中国电波传播研究所,河南新乡 453003 |
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| 基金项目： | 国防基础科研基金资助项目 |
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| 摘 要： | 完全匹配层(PML)吸收边界在处理开域问题的时域有限差分(FDTD)方法中已得到广泛应用.本文从PML中分裂场特性出发,提出一种新的PML构造,该构造中仅有八个子区且无角区.另外,采用降维方法对PML中分裂场进行存储,有效地节省计算内存.三维数值测试结果表明,构造的八层PML反射本地误差约为-160dB.另外,金属球散射截面模拟计算结果证实了新PML构造的实用性.
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| 关 键 词： | 完全匹配层 时域有限差分方法 |
| 文章编号： | 0372-2112(2002)09-1396-04 |
| 收稿时间： | 2002-06-11 |
A New PML Construction for Use with the FDTD Method |
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| LI Qing-liang. A New PML Construction for Use with the FDTD Method[J]. Acta Electronica Sinica, 2002, 30(9): 1396-1399 |
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| Authors: | LI Qing-liang |
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| Affiliation: | China Research Institute of Radiowave Propagation,Xinxiang,Henan 453003,China |
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| Abstract: | The perfectly matched layer (PML) is a highly accurate approach to the finite difference time-domain (FDTD) mesh truncation. However, the PML does enhance increase the computational complexity and the memory requirement for the FDTD simulation . In this paper, we propose a new PML construction based on the properties of the split fields in the PML region. The construction only contains eight PML subsections without corners. Also, we transform a three-dimensional split field component to a two-dimensional array in order to save computer memory. Verifications of the PML construction are provided with numerical examples. |
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| Keywords: | perfectly matched layer finite difference time-domain method |
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