| 2.5维模拟中时域有限差分近-远场变换方法 |
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| 引用本文： | 朱湘琴,王建国,王玥,王光强,陈再高. 2.5维模拟中时域有限差分近-远场变换方法[J]. 强激光与粒子束, 2011, 23(8). DOI: 10.3788/HPLPB20112308.2157 |
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| 作者姓名： | 朱湘琴 王建国 王玥 王光强 陈再高 |
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| 作者单位： | 1. 西北核技术研究所, 西安 710024; 2. 西安交通大学 电子与信息工程学院, 西安 710049 |
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| 基金项目： | 国家高技术发展计划项目 |
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| 摘 要： | 为进行从高功率微波源到天线辐射整个系统的2.5维模拟，在近场模拟的基础上对2.5维模拟中时域有限差分(FDTD)的近-远场变换方法进行了研究。先将2.5维近场模拟区的输出边界绕对称轴旋转一周，得到封闭的3维圆柱面；然后根据等效原理由该封闭面上的FDTD近场求得等效电磁流；再根据自由空间中电流及磁流的时域辐射场公式计算出电磁流的远区辐射场。给出了2.5维模拟中TM01模式及TE01模式激励下圆锥喇叭远区辐射算例，所得计算结果与3维全电磁模拟软件CST的计算结果符合较好。
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| 关 键 词： | 2.5维模拟 时域有限差分方法 近-远场变换 等效原理 远区辐射场 |
| 收稿时间： | 1900-01-01; |
Finite-difference time-domain method for near-to-far-field transformation in 2.5-dimensional simulation |
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| Zhu Xiangqin,Wang Jianguo,Wang Yue,Wang Guangqiang,Chen Zaigao. Finite-difference time-domain method for near-to-far-field transformation in 2.5-dimensional simulation[J]. High Power Laser and Particle Beams, 2011, 23(8). DOI: 10.3788/HPLPB20112308.2157 |
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| Authors: | Zhu Xiangqin Wang Jianguo Wang Yue Wang Guangqiang Chen Zaigao |
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| Affiliation: | (1. Northwest Institute of Nuclear Technology, Xi’an 710024, China;2. School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China) |
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| Abstract: | For the 2.5-dimensional simulation of the whole system from HPM(high power microwave) source to antennas' radiation,a scheme of finite-difference time-domain(FDTD) near-to-far-field transformation in 2.5-dimensional simulation is proposed based on the simulation of near fields.The closed three-dimensional column surface is got through rotating the output-boundary in the 2.5-dimensional simulation domain about the symmetry axis.The equivalent electric and magnetic currents can be obtained from FDTD near fiel... |
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| Keywords: | 2.5-dimensional simulation finite-difference time-domain method near-to-far-field transformation equivalence principle far-fields |
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