0.33 THz雷达三维近场成像系统设计及成像试验

详细信息    查看全文 | 推荐本文 |

英文篇名：Design and Imaging Test of a 0.33 THz Radar 3D Near-field Imaging System 作者：黄建 ; 裴乃昌 ; 王志辉 ; 孙智敏 英文作者：HUANG Jian;PEI Naichang;WANG Zhihui;SUN Zhimin;Southwest China Institute of Electronic Technology;Chengdu Spaceon T&C Technology Co.,Ltd.; 关键词：THz雷达 ; 宽带全息成像 ; 三维重建算法 ; 步进频率 英文关键词：THz radar;;wide-band holographic imaging;;3D image reconstruction algorithm;;frequency-stepping scan 中文刊名：DATE 英文刊名：Telecommunication Engineering 机构：中国西南电子技术研究所;成都天奥测控技术有限公司; 出版日期：2019-06-28 出版单位：电讯技术 年：2019 期：v.59;No.367 语种：中文; 页：DATE201906001 页数：6 CN：06 ISSN：51-1267/TN 分类号：5-10

摘要

提出了采用步进频率结合平面扫描的THz雷达近场成像系统设计方案,基于宽带全息成像原理,可以实现三维高分辨率近场成像。采用多通道收发探头阵列缩短机械扫描行程,提高成像速度。给出了基于快速傅里叶变换(Fast Fourier Transform,FFT)和Stolt插值的三维图像重建算法,成像理论分辨率与波长相当。利用THz矢量网络分析仪和辅助设备,搭建了0.215～0.33 THz成像试验装置,完成了对多层金属-泡沫目标三维成像,成像分辨率达到预期水平,验证了系统设计和三维图像重建算法的正确性。
        A scheme of THz radar system for near-field imaging is presented. The radar system,with frequency-stepping signal waveform and scanned in a plan,can realize 3D imaging with high resolution based on wide-band holographic imaging principle. Total scanning path can be shorten by using a sensor array with multi-channel. Thus the image frame rate can be improved. The 3D image reconstruction algorithm based on fast Fourier transform( FFT) and stolt interplation is given. The theoretical image resolution near wavelength is achieved.A 0.215 ～ 0.33 THz experimental imaging set is built up using THz vector network analyzer and other devices.3D imaging of a target composed of several layers of metal,foam and absorbing material is acquired through the set with resolution as expected,which proves the validity of system design as well as 3D reconstruction algorithm.

引文

[1] SHEEN D M,MCMAKIN D L,HALL T E.Three-dimensional millimeter-wave imaging for concealed weapon detection[J]. IEEE Transactions on Microwave Theory and Techniques,2001,49(9):1581-1592.
    [2] SHEEN D M,HALL T E,SEVERTSEN R H,et al.Standoff concealed weapon detection using a 350 GHz radar imaging system[J].Proceedings of SPIE,2010,7670:1-12.
    [3] COOPER K B,DENGLER R J,UOMBART N,et al.THz imaging radar for standoff personnel screening[J]. IEEE Transactions on Teraherz Science and Technology,2011(1):169-182.
    [4] ZHANG B,PI Y,LI J. Terahertz imaging radar with inverse aperture synthesis techniques:system structure,signal processing,and experiment results[J]. IEEE Sensors Journal,2015,15(1):290-298.
    [5]吴福伟,刘振华,李大圣,等.220 GHz太赫兹合成孔径雷达[J].太赫兹科学与电子信息学报,2017,15(3):368-371.
    [6]江兆凤,张群英,李超,等.室内实测数据太赫兹合成孔径雷达成像研究[J].电子测量技术,2016,39(10):65-71.