采用CMOS太赫兹波探测器的成像系统

发布时间：2018-03-14 01:30

本文选题：太赫兹波成像　切入点：CMOS　出处：《红外与激光工程》2017年01期 　论文类型：期刊论文

【摘要】：太赫兹波成像技术在生物医疗和安全检测等领域具有广阔的应用前景。针对新一代信息技术对便携式太赫兹波成像设备的需求,设计了基于CMOS太赫兹波探测器的成像系统。该系统包括一款CMOS太赫兹波探测器、片外模数转换器(ADC)、FPGA数字信号处理器、二位步进机、四个抛物面镜和太赫兹波辐射源等。CMOS太赫兹波探测器集成了片上贴片天线以及作为检波元件的NMOS晶体管,探测器由180 nm标准CMOS工艺制成。太赫兹波探测器的输出被片外模数转换器(ADC)采集并转换为数字信号,该数字信号被FPGA采集并传输到电脑上成像。所有上述元件均被装备在印刷线路板(PCB)上以减小系统体积。该系统实现了透射式太赫兹波扫描成像而无需斩波-锁相技术,并给出在860 GHz的太赫兹波照射下隐藏在信封内部金属的成像结果。
[Abstract]:Terahertz wave imaging technology has a broad application prospect in biomedical and safety detection. In view of the new generation of information technology for portable terahertz wave imaging equipment, An imaging system based on CMOS terahertz wave detector is designed. The system includes a CMOS THz wave detector, an out of chip A / D converter, a CMOS digital signal processor, and a two bit stepping machine. Four parabolic mirrors and terahertz wave radiation sources. CMOS terahertz wave detectors integrate on-chip patch antennas and NMOS transistors as detection elements. The detector is made of 180nm standard CMOS process. The output of THz wave detector is collected and converted into digital signal by the off-chip A / D converter. The digital signal is collected by FPGA and transmitted to the computer for imaging. All the above components are equipped on the printed circuit board (PCB) to reduce the volume of the system. The system realizes the transmission terahertz wave scanning imaging without chopping and phase-locking technology. The imaging results of metal hidden inside the envelope at 860 GHz THz wave are given.
【作者单位】：中国科学院半导体研究所半导体超晶格国家重点实验室;
【基金】：国家自然科学基金(61331003,61474108) 北京市自然科学基金(4152051)
【分类号】：TN386.1

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