| STF-FDTD方法计算核电磁脉冲在电离层传播 |
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| 引用本文： | 吴跃丽,葛德彪.STF-FDTD方法计算核电磁脉冲在电离层传播[J].杭州电子科技大学学报,2005,25(2):95-98. |
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| 作者姓名： | 吴跃丽 葛德彪 |
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| 作者单位： | 1. 杭州电子科技大学理学院,浙江,杭州,310018
2. 西安电子科技大学理学院,陕西,西安,710071 |
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| 摘 要： | 电离层是一种色散介质，在处理色散介质中电磁波的散射和传播问题时，用移位算子处理有理分式法获得FDTD计算中电位移矢量D和电场强度E的时域递推关系。此外，核电磁脉冲可以用双指数脉冲表示，具有长的拖尾，与散射体的作用时间很长。采用散射传递函数(STF)法可以减少计算时间。最后，应用移位算子法结合STF—FDTD方法给出核电磁脉冲在电离层中传播的算例。
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| 关 键 词： | 时域有限差分方法 电离层 移位算子 色散传递函数法 |
| 文章编号： | 1001-9146(2005)02-0095-04 |
Hybrid STF- FDTD Approach for Computation of Nuclear Electromagnetic Pulse Propagation in Ionosphere |
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| WU Yue-li,GE De-biao.Hybrid STF- FDTD Approach for Computation of Nuclear Electromagnetic Pulse Propagation in Ionosphere[J].Journal of Hangzhou Dianzi University,2005,25(2):95-98. |
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| Authors: | WU Yue-li GE De-biao |
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| Affiliation: | WU Yue-li~1,GE De-biao~2 |
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| Abstract: | Ionosphere is dispersive media. This shift operator method is then applied to the dispersive medium case. The recursive relation for D and E available for FDTD computation is obtained. Nuclear electromagnetic pulse can be expressed by double-exponential pulse. Double-exponential pulse is extremely slow-decaying. It takes double-exponential pulse a great deal of time to finish propagation in ionosphere. STF is capable of calculate double-exponential pulse propagation and scattering in media. The derived formulation is obtained by the shift operator method. STF-FDTD and the relation between D and E is applied to calculate scattering for double-exponential pulse incident on ionosphere. |
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| Keywords: | the finite difference time domain ionosphere shift operator scattering transfer function |
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