中国激光, 2019, 46 (6): 0614032, 网络出版: 2019-06-14   

针对隐藏目标检测的太赫兹波站开式全极化全息雷达成像实验 下载: 1189次

Standoff Fully-Polarimetric Holographic-Radar-Imaging Experiments in Terahertz Regime for Concealed Target Detection
作者单位
中国工程物理研究院电子工程研究所, 四川 绵阳 621999
摘要
将全极化信息引入站开式全息成像系统中,设计了一种频率为0.14 GHz的全极化宽带雷达,并基于该系统完成了隐藏目标检测的太赫兹波站开式全极化全息成像实验。利用极化目标分解方法,分析了隐藏目标的低熵极化散射,研究了在不同角度照射下的平均极化散射机制。实验结果表明:在0.14 THz频段下,典型衣物材料的遮挡会改变背景杂波的散斑样式,但对强散射回波目标的极化散射影响很小;人造目标的极化散射熵较背景杂波更小;模型手枪的主要散射机理为光滑表面对应的低熵表面散射,其中套筒上的斜纹包含了低熵多次散射,这是该目标交叉极化回波的主要来源。
Abstract
In this study, fully-polarimetric information is introduced to a standoff holographic imaging system. A 0.14-GHz fully-polarimetric wideband radar is designed for detecting concealed targets in a standoff fully-polarimetric holographic-radar-imaging experiment. The low-entropy polarization scattering of concealed targets is analyzed through the target-polarization decomposition method, and the average polarization scattering mechanism is investigated at different irradiation angles. The experimental results show that in the 0.14 THz band, the covering by the typical clothing materials is found to alter the speckle pattern of the background clutter, but has a negligible impact on the polarization scattering of a strongly scattered echo target. The polarization scattering entropy of the artificial target is smaller than that of the background clutter. The main scattering mechanism of a model pistol is the low-entropy surface scattering from its smooth surface, in which the inclined stripes on the sleeve contribute to the low-entropy multiple scattering, which is the main source of the cross-polarization echo of the target.

经文, 安健飞, 江舸, 成彬彬, 张健. 针对隐藏目标检测的太赫兹波站开式全极化全息雷达成像实验[J]. 中国激光, 2019, 46(6): 0614032. Wen Jing, Jianfei An, Ge Jiang, Binbin Cheng, Jian Zhang. Standoff Fully-Polarimetric Holographic-Radar-Imaging Experiments in Terahertz Regime for Concealed Target Detection[J]. Chinese Journal of Lasers, 2019, 46(6): 0614032.

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