一种0.34 THz站开式三维成像安检仪  

A 0.34 THz 3D imaging radar for standoff personal screening

作　　者：经文 安健飞[1,2] 成彬彬[1,2] 陈鹏[1,2] 何月[1,2] 陆彬[1,2] JING Wen;AN Jianfei;CHENG Binbin;CHEN Peng;HE Yue;LU Bin(Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang Sichuan 621999,China;Microsystem&Terahertz Research Center,China Academy of Engineering Physics,Mianyang Sichuan 621999,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621999 [2]中国工程物理研究院微系统与太赫兹研究中心,四川绵阳621999

出　　处：《太赫兹科学与电子信息学报》2018年第5期757-762,共6页Journal of Terahertz Science and Electronic Information Technology

摘　　要：介绍了一种太赫兹站开式大视角三维成像雷达系统。系统可用于人体隐藏危险品的成像检测,采用二维非均匀逐点扫描的工作方式,视场范围达到0.6m×1m,成像速度达到2s。系统工作于0.34THz,采用直径450mm椭球镜聚焦,在5.8m的成像距离实现了2cm的方位分辨力。为了改善回波动态范围,采用相位噪声相消的系统结构。系统采用调频连续波(FMCW)雷达线性调频信号作为工作波形,工作带宽达到12GHz。成像结果显示,系统校正后的距离分辨力可达到2 cm,能够实现隐藏危险品的有效检测。A summary of a 0.34 THz standoff 3D imaging radar is presented which can be used for through-clothes imaging of person-borne concealed objects.Using a two dimensional non-uniform point-by-point scanning mode,a field of view of 0.6 m×1 m and 2 s imaging speed is achieved.The central frequency is 0.34 THz,and a 2 cm azimuth resolution at 5.8 m is obtained by using a ellipsoid with a diameter of 450 mm.In order to improve the dynamic range of the system,a phase noise cancellation structure is adopted.The Frequency-Modulated Continuous-Wave(FMCW)radar technique with a 12 GHz bandwidth is employed in the system.Imaging result shows that 2 cm range resolution can be achieved after calibration and the system can be utilized to detect concealed weapons.

关 键 词：站开式成像 太赫兹成像 视场 线性度校正 

分 类 号：TN957.52[电子电信—信号与信息处理]