| 采用PML吸收边界条件的FDTD法在分析波导不连续性中的应用 |
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| 引用本文： | 卞军峰,余春,钟顺时.采用PML吸收边界条件的FDTD法在分析波导不连续性中的应用[J].上海大学学报(自然科学版),2002,8(1):7-10,24. |
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| 作者姓名： | 卞军峰 余春 钟顺时 |
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| 作者单位： | 上海大学,通信与信息工程学院,上海,200072 |
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| 基金项目： | 国家自然科学基金 ( 6 98895 0 1)资助项目 |
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| 摘 要： | 研究采用理想匹配层（PML）吸收边界条件的时域有限差分法（PML-FDTD法）在分析波导不连续性问题中的应用，首先通过模拟正弦调制的高斯脉冲在波导中的传输来验证PML的吸收性能，然后将采用PML吸收边界的FDTD法应用于矩形波导填充有限媒质时的S参数和圆形波导中矩形薄膜片反射系数的计算，数值结果与巳有文献比较一致，说明了PML吸收边界条件用于FDTD法分析波导问题的有效性。
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| 关 键 词： | 时域有限差分法 吸收边界条件 理想匹配层 波导不连续性 电磁波传播 吸收性能 |
| 文章编号： | 1007-2861(2002)01-0007-04 |
Application of FDTD with PML ABC in Analysis of Waveguide Discontinuities |
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| BIAN Jun-feng,YU Chun,ZHONG Shun-shi.Application of FDTD with PML ABC in Analysis of Waveguide Discontinuities[J].Journal of Shanghai University(Natural Science),2002,8(1):7-10,24. |
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| Authors: | BIAN Jun-feng YU Chun ZHONG Shun-shi |
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| Abstract: | Discontinuities in waveguides are analyzed by the finite-difference time-domain (FDTD) method with perfectly matched layer (PML) absorbing boundary condition (ABC). The performance of PML is investigated using FDTD modeling of the propagation of sinusoidally modulated Gaussian pulse in a rectangular waveguide. Using the FDTD method with PML ABC, scattering parameters of rectangular waveguide filled with finite length dielectric material, and the reflection coefficient of circular waveguide with a rectangular iris are calculated. Numerical results agree very well with the reference's, and confirm the validity of PML-FDTD method in analysis of waveguide discontintities. |
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| Keywords: | finite-difference time-domain method absorbing boundary condition perfectly matched layer waveguide discontinuities |
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