| 柱坐标系下PML—FDTD及总场—散射场区连接条件 |
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| 引用本文： | 张洪欣,吕英华,黄永明.柱坐标系下PML—FDTD及总场—散射场区连接条件[J].重庆邮电学院学报(自然科学版),2003,15(3):4-8. |
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| 作者姓名： | 张洪欣 吕英华 黄永明 |
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| 作者单位： | 北京邮电大学培训中心 北京100876
(张洪欣，吕英华)，北京邮电大学培训中心 北京100876(黄永明) |
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| 基金项目： | 国家自然科学基金资助项目 ( 60 2 710 18，6993 10 3 0 ) |
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| 摘 要： | 在三维柱坐系下推导了完全匹配层(PML)吸收边界条件的时城有限差分(FDTD)表达式(PML—FDTD)，从而把FDTD方法推广到完全三维柱坐标系中。电磁波的远场可以视为平面波(TEM)，在目标电磁散射特性的研究中常常被作为激励源，给出了柱坐标系下完整的总场-散射场区的连接边界条件，从而模拟了平面波在自由空间的传播。最后，模拟了平西波和柱面波在自由空间中的传播过程，在产生了TEM波后，就可以方便地得到TE／TM波，从而满足对其它形式激励源的要求。
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| 关 键 词： | 时城有限差分 完全匹配层 总场 散射场 连接边界条件 |
The Study on PML-FDTD and Boundary Connecting Conditions of Total-Scattering Fields in 3-D Cylindrical Coordinates |
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| ZHANG Hong-xin,LU Ying-hua,HUANG Yong-ming.The Study on PML-FDTD and Boundary Connecting Conditions of Total-Scattering Fields in 3-D Cylindrical Coordinates[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2003,15(3):4-8. |
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| Authors: | ZHANG Hong-xin LU Ying-hua HUANG Yong-ming |
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| Abstract: | In this paper, the finite-difference time-domain formation of Maxwell's equation is deduced and coded in perfectly matched layer(PML-FDTD) in three-dimension cylindrical complex coordinates. As a general excitation source, planar wave(TEM) is often used in research on scattering problems. In order to simulate the propagation of TEM wave in free space, the perfect boundary connecting conditions of total-scattered fields are proposed in 3-D cylindrical coordinates. At last, the propagation of TEM and cylindrical wave in free space is simulated. Other TE/TM excitation sources are conveniently produced after the TEM wave is obtained. |
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| Keywords: | FDTD PML total fields scattered fields boundary connecting conditions |
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