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.
作者
经文
安健飞
成彬彬
陈鹏
何月
陆彬
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)
出处
《太赫兹科学与电子信息学报》
北大核心
2018年第5期757-762,共6页
Journal of Terahertz Science and Electronic Information Technology
关键词
站开式成像
太赫兹成像
视场
线性度校正
standoff imaging
terahertz imaging
field of view
nonlinearity calibration
