| 太赫兹粗糙金属目标镜面雷达散射截面预估方法 |
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| 引用本文： | 逄爽,曾旸,杨琪,邓彬,王宏强.太赫兹粗糙金属目标镜面雷达散射截面预估方法[J].国防科技大学学报,2022,44(1):48-54. |
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| 作者姓名： | 逄爽 曾旸 杨琪 邓彬 王宏强 |
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| 作者单位： | 国防科技大学 电子科学学院, 湖南 长沙 410073;国防科技大学 电子科学学院, 湖南 长沙 410073;国防科技大学 气象海洋学院, 湖南 长沙 410073 |
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| 基金项目： | 国家自然科学基金资助项目(61871386,61971427) |
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| 摘 要： | 在太赫兹频段,研究金属目标表面粗糙度对雷达散射截面(Radar Cross Section,RCS)的调制作用,对粗糙金属目标的RCS缩比测量具有重要意义.通过研究太赫兹粗糙金属目标镜面RCS随粗糙度的变化规律,结合相干、非相干散射理论,在基尔霍夫近似法的基础上,提出一种特定参数区间粗糙金属目标镜面RCS的预估方法,并...
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| 关 键 词： | 太赫兹 雷达散射截面 基尔霍夫近似 粗糙表面 金属目标 |
| 收稿时间： | 2021/1/7 0:00:00 |
Estimation of specular radar cross section for metal object with rough surfaces in terahertz band |
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| PANG Shuang,ZENG Yang,YANG Qi,DENG Bin,WANG Hongqiang.Estimation of specular radar cross section for metal object with rough surfaces in terahertz band[J].Journal of National University of Defense Technology,2022,44(1):48-54. |
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| Authors: | PANG Shuang ZENG Yang YANG Qi DENG Bin WANG Hongqiang |
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| Institution: | College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China;College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China;College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Research on the modulation of the surface roughness to the RCS (radar cross section) has vital importance to the RCS scaled measurement for rough metal targets in the terahertz band. The changing laws of specular RCS of rough metal target with different surface roughness were studied. Based on the method of Kirchhoff approximation, combined with the theory of coherent and incoherent scattering, the method for predicting the specular RCS of rough metal target was proposed under the condition of small surface roughness. The effectiveness of the prediction method was validated by simulation experiments. The proposed method can achieve fast estimation of specular RCS for metal target with small surface roughness in the low terahertz band, and further predict the specular RCS for the scaled model with rough surface. This method also can provide effective RCS value for the comparison with the measurement result, which theoretically supports the study of RCS scaled measurements for rough targets in the terahertz spectrum. |
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| Keywords: | terahertz radar cross section Kirchhoff approximation rough surface metal target |
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