| 不稳定表面粗糙目标的太赫兹波段散射特性分析 |
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| 引用本文： | 李昌泽,童创明,王童,王伟杰,齐立辉. 不稳定表面粗糙目标的太赫兹波段散射特性分析[J]. 强激光与粒子束, 2016, 28(4): 043101-57. DOI: 10.11884/HPLPB201628.123101 |
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| 作者姓名： | 李昌泽 童创明 王童 王伟杰 齐立辉 |
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| 作者单位： | 1.空军工程大学 防空反导学院, 西安 71 0051 |
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| 基金项目： | 国家自然科学基金项目(61372033) |
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| 摘 要： | 研究了不同粗糙度下的非均匀和分区均匀不稳定表面粗糙导体目标在太赫兹波段的散射特性。区别于采用经验公式的建模方法，提出把随机粗糙面的建模理念应用到太赫兹波段的非均匀和分区均匀不稳定表面粗糙导体目标的建模中，用描述粗糙面的均方根高度和相关长度两个物理量来调节目标表面的粗糙度变化。提出表面粗糙目标的分类形式并给出具体模型，然后用随机高斯粗糙面来模拟非均匀和分区均匀不稳定粗糙目标的表面，再采用物理光学和等效电流相结合的方法来进行仿真计算，分别对不同入射角、不同频率和不同粗糙度的非均匀和分区均匀不稳定表面粗糙导体目标的太赫兹波散射特性进行分析，最后得出了相关的结论。
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| 关 键 词： | 太赫兹波 表面粗糙目标 雷达散射截面 粗糙度 |
| 收稿时间： | 2015-09-23 |
Analysis of terahertz wave scattering characteristics of unstable rough surface target |
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| Li Changze;Tong Chuangming;Wang Tong;Wang Weijie;Qi Lihui. Analysis of terahertz wave scattering characteristics of unstable rough surface target[J]. High Power Laser and Particle Beams, 2016, 28(4): 043101-57. DOI: 10.11884/HPLPB201628.123101 |
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| Authors: | Li Changze Tong Chuangming Wang Tong Wang Weijie Qi Lihui |
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| Affiliation: | 1.Air and Missile Defense College,Air Force Engineering University,Xi’an 710051,China |
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| Abstract: | The scattering characteristics in terahertz band of uniform partition and non-uniform unstable conducting target with different roughness surface is studied. This paper proposes to apply the modeling concept of randomly rough surface to the modeling of uniform partition and non-uniform unstable rough surface target in terahertz band, which is different from the modeling method of using formulae. Two physical quantities which are used to describe the RMS height and correlation length of rough surface are applied to adjust the roughness of target surface. Firstly, the rough surfaces of uniform partition and non-uniform unstable target are modeled by Gaussian random surface, then a combined method of physic optics and equivalent current is employed for simulation. The THz wave scattering characteristics of different rough surface target with different incident angles, different frequencies and different roughness are analyzed and discussed. Finally, the relevant conclusions are drawn. |
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