(英)W波段三维近场安检成像系统
投稿时间:2016-12-02  修订日期:2017-04-07  点此下载全文
引用本文:程航,郑海涛,敬汉丹,李世勇,孙厚军.(英)W波段三维近场安检成像系统[J].红外与毫米波学报,2017,36(4):408~414].Cheng Hang,Zheng Hai-Tao,Jing Han-Dan,Li Shi-Yong,Sun Hou-Jun.Three-Dimensional Near-Field Surveillance Imaging Using W-band System[J].J.Infrared Millim.Waves,2017,36(4):408~414.]
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作者单位E-mail
程航 北京理工大学 chenghang1031@126.com 
郑海涛 北京理工大学  
敬汉丹 北京理工大学  
李世勇 北京理工大学  
孙厚军 北京理工大学 chenghang1031@126.com 
中文摘要:本文介绍了一套基于频率步进体制的W波段三维近场安检成像系统以及相应的成像算法。W波段信号可以穿透普通衣物,对人员携带的藏匿物品进行成像。成像算法通过在频率波数域进行插值处理可以完全补偿近场的波前曲面。文中阐述了频率波数域的插值过程以及实验数据的预处理过程。成像系统通过发射宽带信号得到高分辨距离像,通过提高工作频率得到高分辨方位像,方位向分辨率优于5mm。成像实验结果表明该系统性能优于现有的Ka波段成像系统。
中文关键词:毫米波成像  近场成像  人体安检  三维成像  W波段系统
 
Three-Dimensional Near-Field Surveillance Imaging Using W-band System
Abstract:—This paper presents a W-band stepped-frequency three-dimensional near-field surveillance imaging system together with an effective radar imaging algorithm. W-band signal is able to penetrate common clothing barriers to form an image of a person as well as any concealed items. Performing the image reconstruction procedure in the frequency–wavenumber domain, the algorithm is able to completely compensate the wavefront curvature in the near field through interpolation process. The interpolation relationship in frequency–wavenumber domain between sampled data and desired data is demonstrated. Moreover, the difference between algorithm model and experimental data are revealed. High range resolution and lateral resolution are obtained by emitting wideband stepped frequency signal and adopting high operating frequency. The cross-range resolution of the imaging result is better than 5mm. The scheme of imaging system is described in detail along with a set of imaging results to show its superior imaging precision and sensitivity compared with existing Ka-band equipment.
keywords:millimeter-wave (MMW) imaging  near-field imaging  personnel surveillance  three-dimensional imaging  W-band system  
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