| 引用本文: | 尹家贤,刘克成,刘培国,等.FDTD中波导激励源研究.[J].国防科技大学学报,2001,23(2):99-102.[点击复制] |
| YIN Jiaxian,LIU Kecheng,LIU Peiguo,et al.Study of Excitation Source in Waveguide Using FDTD Method[J].Journal of National University of Defense Technology,2001,23(2):99-102[点击复制] |
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| FDTD中波导激励源研究 |
| 尹家贤, 刘克成, 刘培国, 毛钧杰 |
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(国防科技大学 电子科学与工程学院, 湖南 长沙 410073)
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| 摘要: |
| FDTD已广泛应用于波导问题的计算，本文首先讨论Gaussian脉冲在波导中传输时的波形变化情况，然后根据波导的色散特性，提出一种调制的脉冲波作为波导入射波的激励源，给出了脉冲宽度与调制频率的计算公式；讨论在脉冲激励的条件下入射场的计算方法，总场/反射场的连接方法；最后给出计算实例证明方法的有效性。 |
| 关键词: FDTD 波导不连续性 |
| DOI： |
| 投稿日期：2000-10-12 |
| 基金项目: |
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| Study of Excitation Source in Waveguide Using FDTD Method |
| YIN Jiaxian, LIU Kecheng, LIU Peiguo, MAO Junjie |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The finite-difference time-domain method (FDTD) is used to simulate propagation of Gaussian pulse in waveguide. According to the dispersive characteristics of waveguide, a new modulate pulse is presented for excitation source of waveguide, and the formulations of pulse width T and modulate frequency are also given. Applications of the technique are presented, and the numerical results are compared with experimental results, and the comparison shows excellent agreement over a wide frequency band. |
| Keywords: FDTD waveguide discontinuities |
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