| 用FDTD法计算外开槽同轴波导的归-化截止频率 |
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| 引用本文： | 李禹华,郑勤红,毛玮,何佳,李淼,姜艳娥.用FDTD法计算外开槽同轴波导的归-化截止频率[J].云南师范大学学报(自然科学版),2009,29(4):54-56. |
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| 作者姓名： | 李禹华 郑勤红 毛玮 何佳 李淼 姜艳娥 |
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| 作者单位： | 云南师范大学物理与电子信息学院,云南,昆明,650092 |
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| 基金项目： | 国家自然科学基金，云南省自然科学基金，云南省教育厅科研立项基金 |
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| 摘 要： | 给出圆柱坐标系下用FDTD法计算电磁场问题的差分格式和用FDTD法分析开槽金属波导截止频率的主要计算过程。实例计算了具有解析的空心金属圆波导和同轴传输线的传输特性，证明了圆柱坐标系下FDTD方法的正确性和有效性；用同一程序计算无解析的开槽同轴波导的传输特性，分析了各种开槽条件下开槽同轴波导截止频率的影响。
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| 关 键 词： | 时域有限差分法 外开槽同轴波导 圆波导 归一化截止频率 |
FDTD Method Analysis of the Normalized Cut off Frequency of Coaxial Waveguides with Outer Slotted |
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| LI Yu-hua,ZHENG Qin-hong,MAO Wei,HE Jia,LI Miao,JIANG Yan-e.FDTD Method Analysis of the Normalized Cut off Frequency of Coaxial Waveguides with Outer Slotted[J].Journal of Yunnan Normal University (Natural Sciences Edition),2009,29(4):54-56. |
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| Authors: | LI Yu-hua ZHENG Qin-hong MAO Wei HE Jia LI Miao JIANG Yan-e |
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| Institution: | (School of Physics and Electronic Information, Yunnan Normal University, Kunming 650092, China) |
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| Abstract: | This paper describes how to calculate the cut - off frequency of metal waveguides with slotted by using finite -difference time -domain （FDTD） method based on the polar axes. In order to demonstrate the availability of the method, the cut - off frequency of metal empty circular waveguide and coaxial transmission line with an analytic value are calculated, and the slotted coaxial waveguides that can not be calculated analytically are presented with the same program. At last, the cut - off frequency of the slotted coaxial waveguide with various slotting conditions is also presented and discussed. |
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| Keywords: | finite -difference time -domain outer slotted coaxial waveguide circular waveguide cut off frequency |
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