doi:10.3969/j.issn.1001-893x.2019.06.001
引用格式：黄建，裴乃昌，王志辉，等.0.33THz雷达三维近场成像系统设计及成像试验[J].电讯技术,2019,59(6):621-626.[HUANG Jian, PEI Naichang,WANG Zhihui,et al.Design and imaging test of a0.33THz radar3D near-field imaging system[J].Telecommunication Engi⁃neering,2019,59(6):621-626.] 0.33THz雷达三维近场成像系统设计及成像试验*
贾耀斌黄 建**1，裴乃昌1，王志辉1，孙智敏2
(1.中国西南电子技术研究所，成都610036;2.成都天奥测控技术有限公司，成都610036) 程春晓
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㊂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㊂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㊂利用THz矢量网络分析仪和辅助设备，搭建了0.215~0.33THz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㊂ 中国军人核心价值观
湛江师范学院图书馆关键词:THz雷达；宽带全息成像；三维重建算法；步进频率
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中图分类号:TN957 文献标志码:A 文章编号:1001-893X(2019)06-0621-06
Design and Imaging Test of a0.33THz Radar3D
Near-field Imaging System
HUANG Jian1,PEI Naichang1,WANG Zhihui1,SUN Zhimin2
(1.Southwest China Institute of Electronic Technology,Chengdu610036,China;
2.Chengdu Spaceon T&C Technology Co.,Ltd.,Chengdu610036,China)
Abstract:A scheme of THz radar system for near-field imaging is presented.The radar system,with fre⁃quency-stepping signal waveform and scanned in a plan,can realize3D 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.The3D image reconstruction algorithm based on fast Fourier transform(FFT)and stolt interplation is given.The theoretical image resolution near wavelength is achieved.A0.215~0.33THz 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 as3D reconstruction algorithm.
Key words:THz radar;wide-band holographic imaging;3D image reconstruction algorithm;frequency-stepping scan
1 引 言
太赫兹(THz)成像技术在环境监测㊁安全检查㊁复合材料无损检测和医学成像领域中均有广泛的应用前景㊂目前已有的THz成像系统主要分为主动
㊃126㊃
第59卷第6期
2019年6月电讯技术
Telecommunication Engineering Vol.59,No.6 June,2019
*空战机动
**收稿日期:2019-04-15；修回日期:2019-05-18通信作者:huangjianem@sohu
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