| 二维导体粗糙面电磁散射的分形特征研究 |
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| 引用本文： | 郭立新,吴振森. 二维导体粗糙面电磁散射的分形特征研究[J]. 物理学报, 2000, 49(6): 1064-1069 |
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| 作者姓名： | 郭立新 吴振森 |
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| 作者单位： | 西安电子科技大学理学院，西安 710071 |
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| 基金项目： | 国防科技预研基金(批准号：98J3.2.4DZ01)资助的课题. |
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| 摘 要： | 采用二维归一化带限Brown分形函数来模拟二维分形粗糙面，主要利用基尔霍夫近似给出了该导体粗糙面的电磁散射场.导出了平均散射场、平均散射系数和散射强度方差的计算公式.讨论了散射场分布与分维的关系，获得了散射场波峰拟合线的斜率与分维D满足线性关系这一重要结论.关键词：
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| 关 键 词： | 二维导体粗糙面 电磁散射 分形特征 |
| 收稿时间： | 1999-07-10 |
FRACTAL CHARACTERISTICS INVESTIGATION ON ELECTROMAGNETIC SCATTERING FROM 2D CONDUCTING ROUGH SURFACE |
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| GUO LI-XIN and WU ZHEN-SEN. FRACTAL CHARACTERISTICS INVESTIGATION ON ELECTROMAGNETIC SCATTERING FROM 2D CONDUCTING ROUGH SURFACE[J]. Acta Physica Sinica, 2000, 49(6): 1064-1069 |
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| Authors: | GUO LI-XIN and WU ZHEN-SEN |
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| Abstract: | A normalized two-dimensional band-limited Brown fractal function is presented for modelling the rough surface. An analytic solution of electromagnetic scattering field from this conducting band-limited Brown fractal surface is given based on Kirchhoff approximation. The average scattering field, the average scattering coefficient and the average intensity of scattering field are derived with emphasis on examining the relation of fractal dimension with the scattering pattern. The important conclusion is obtained that the diffracted envelope slopes of scattering pattern can be approximated to a slope of linear equation. |
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