| 随机粗糙地面的宽带电磁散射研究 |
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| 引用本文： | 朱小敏,任新成.随机粗糙地面的宽带电磁散射研究[J].河南科学,2014(8):1457-1461. |
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| 作者姓名： | 朱小敏 任新成 |
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| 作者单位： | 延安大学 物理与电子信息学院,陕西延安,716000 |
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| 基金项目： | 国家自然科学基金项目(61379026)；延安市科技计划项目(2012kg-10)；榆林市科技计划项目 |
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| 摘 要： | 利用指数型随机粗糙面模拟实际的粗糙地面,运用时域有限差分法研究了微分高斯脉冲波照射时粗糙地面的宽带电磁散射问题,得出了后向散射系数的频率响应曲线,计算了后向散射系数随粗糙地面高度起伏均方根、相关长度、土壤湿度、入射角等参数的变化情况,并做了详细分析与讨论,得到了指数型粗糙地面的宽带电磁散射特性.
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| 关 键 词： | 时域有限差分法 宽带电磁散射 粗糙地面 后向散射系数 |
The Broadband Electromagnetic Scattering from Random Rough Land Surface |
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| Zhu Xiaomin,Ren Xincheng.The Broadband Electromagnetic Scattering from Random Rough Land Surface[J].Henan Science,2014(8):1457-1461. |
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| Authors: | Zhu Xiaomin Ren Xincheng |
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| Institution: | (School of Physics and Electronic Information, Yah＇an University, Yan＇an 716000, Shaanxi China) |
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| Abstract: | The actual rough land surface is simulated with model of exponential type random rough surface, the wide-band electromagnetic scattering from rough land surface under Gaussian differential pulse irradiation is studied using FDTD, and the curves with frequency distribution of back scattering coefficient are obtained. The back scattering coefficient varying with the root-mean-square of height fluctuation, the correlation length of rough land surface, the moisture capacity of soil, the angle of incidence wave is calculated in detail. The characteristics of the wide-band scattering from rough land surface with exponential type distribution are obtained. |
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| Keywords: | FDTD broadband electromagnetic scattering rough land surface back scattering coefficient |
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