| 柱坐标系中的驻波-行波边界条件 |
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| 引用本文： | 余同彬,卢春兰.柱坐标系中的驻波-行波边界条件[J].中国电子科学研究院学报,2007,2(6):572-574,578. |
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| 作者姓名： | 余同彬 卢春兰 |
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| 作者单位： | 解放军理工大学通信工程学院,南京210007 |
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| 摘 要： | 时域有限差分法模拟中所用的驻波-行波边界条件(STWBC)具有较高的计算效率,且非常易于实现.但此吸收边界条件最初仅用于直角坐标的情形.文章将STWBC扩展到柱坐标的情形与直角坐标的情形一样,柱坐标中的STWBC也在计算域外附加理想导电(磁)壁进行截断,并将边界处的驻波转化为行波,从而模拟行波在无限大空间的传播.文中给出的数值算例证明了此种吸收边界条件的有效性.
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| 关 键 词： | 时域有限差分法 驻波-行波边界条件 吸收边界条件 |
| 文章编号： | 1673-5692（2007）06-572-03 |
| 收稿时间： | 2007-03-19 |
| 修稿时间： | 2007-11-20 |
Standing-Traveling Wave Boundary Condition For FDTD Simulation in Cylindrical Coordinates |
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| YU Tong-bin, LU Chun-lan.Standing-Traveling Wave Boundary Condition For FDTD Simulation in Cylindrical Coordinates[J].Journal of China Academy of Electronics and Information Technology,2007,2(6):572-574,578. |
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| Authors: | YU Tong-bin LU Chun-lan |
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| Abstract: | Standing-Traveling Wave Boundary Condition(STWBC) used in Finite-Difference Time-Domain(FDTD) simulations is computationally efficient and very easy to implement.But,the initial implementation is restricted to Cartesian coordinates.In this paper,STWBC is extended in cylindrical coordinates.The perfect electric conducting(PEC) is used in the extension,and the standing wave on the boundary is transformed to the traveling wave.A Numerical example is given to validate this implementation. |
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| Keywords: | finite-difference time-domain(FDTD) standing-traveling wave boundary condition(STWBC) absorbing boundary condition(ABC) |
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