| 太赫兹时域雷达成像研究 |
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| 引用本文： | 魏明贵,梁达川,谷建强,闵锐,李晋,欧阳春梅,田震,何明霞,韩家广,张伟力. 太赫兹时域雷达成像研究[J]. 雷达学报, 2015, 4(2): 222-229. DOI: 10.12000/JR14125 |
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| 作者姓名： | 魏明贵 梁达川 谷建强 闵锐 李晋 欧阳春梅 田震 何明霞 韩家广 张伟力 |
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| 作者单位： | 1. (天津大学精密仪器与光电子工程学院 天津 300072)2. (光电信息技术教育部重点实验室 天津 300072)3. (电子科技大学电子工程学院 成都 611731) |
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| 基金项目： | 国家重点基础研究发展计划(2014CB339800),国家自然科学基金(61107053, 61138001), 国家重大科学仪器设备开发专项(2011YQ150021)资助课题 |
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| 摘 要： | 该文在太赫兹时域雷达基础上,通过改进后的后向投影(BP)算法对多种模型进行了系统的成像研究,验证了散射太赫兹时域信号的成像机制.成像结果显示实验实现了分辨6mm的空间间隔;同时理论计算证明太赫兹时域雷达具有0.125mm的横向和0.125mm的纵向分辨率潜力.该文还对后向投影算法所产生的环形中心增强现象进行了分析讨论,并讨论了成像背景圆环的原因与抑制方法.
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| 关 键 词： | 太赫兹 雷达 成像 后向投影(BP)算法 |
| 收稿时间： | 2014-11-02 |
Terahertz Radar Imaging Based on Time-domain Spectroscopy |
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| Wei Ming-gui,Liang Da-chuan,Gu Jian-qiang,Min Rui,Li Jin,Ouyang Chun-mei,Tian Zhen,He Ming-xia,Han Jia-guang,Zhang Wei-li. Terahertz Radar Imaging Based on Time-domain Spectroscopy[J]. Journal of Radars, 2015, 4(2): 222-229. DOI: 10.12000/JR14125 |
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| Authors: | Wei Ming-gui Liang Da-chuan Gu Jian-qiang Min Rui Li Jin Ouyang Chun-mei Tian Zhen He Ming-xia Han Jia-guang Zhang Wei-li |
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| Affiliation: | 1.( College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China)2.( Key Laboratory of Opto-Electronics Information and Technical Science, Ministry of Education, Tianjin 300072, China)3. (School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China) |
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| Abstract: | This study uses time domain terahertz radar system to discuss systematic imaging studies on the scaled models based on the improved Back-Projection(BP) algorithm. We image the scaled models with different shapes and are able to distinguish spatial gaps as small as 6 mm. TheTheoretical calculation predicts that the lateral resolution and the axial resolution can be as high as 0.125 mm. Center enhancement and background rings caused by the algorithm in the imaging results are also qualitatively analyzed and are proposed methods to overcome this problem. |
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