太赫兹科学与电子信息学报2016，Vol.14Issue(6)：833-837,5.DOI:10.11805/TKYDA201606.0833
高分辨力亚毫米波全息成像系统
Wide-band three-dimensional submillimeter-wave holographic imaging system
摘要
Abstract
Active millimeter wave imaging provides a safe and effective technique for human security inspection. In order to further improve the imaging resolution and quality, the development of millimeter wave imaging system with wide band and high frequency is of great significance. For this purpose, an active submillimeter-wave imaging system with wide band and high frequency which utilizes a 280GHz– 320GHz transceiver is constructed and characterized. It uses the heterodyne mixing technique to directly get the holographic data which can be reconstructed to form the reflectivity image of object. The range and cross-range resolutions are tested as well as the signal to noise ratio of the system. The range and cross-range resolution reaches 4mm and 2.5mm×2.5mm, respectively, approaching their theoretical values. The impact of bandwidth on the imaging results is also investigated benefiting from the wide-band nature of the system. Apart from increasing the range resolution, wide-band nature can also effectively suppress the speckle effect.关键词
亚毫米波/宽带天线/外差混频技术/全息成像Key words
submillimeter-wave/wideband antennas/heterodyne mixing technique/holographic imaging分类
信息技术与安全科学引用本文复制引用
王子野,乔灵博,王迎新,赵自然..高分辨力亚毫米波全息成像系统[J].太赫兹科学与电子信息学报,2016,14(6):833-837,5.基金项目
国家重大仪器设备开发专项资助(2012YQ140037) （2012YQ140037）
北京市科技计划课题(Z151100003315022) （Z151100003315022）
