① (天津大学精密仪器与光电子工程学院 天津 300072) ② (光电信息技术教育部重点实验室 天津 300072) ③ (电子科技大学电子工程学院 成都 611731)
Terahertz Radar Imaging Based on Time-domain Spectroscopy
Wei Ming-gui①② Liang Da-chuan①② Gu Jian-qiang①② Min Rui③ Li Jin③ Ouyang Chun-mei①② Tian Zhen①② He Ming-xia①② Han Jia-guang①② Zhang Wei-li①③
①( College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China) ②( Key Laboratory of Opto-Electronics Information and Technical Science, Ministry of Education, Tianjin 300072, China) ③ (School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)
This study uses time domain terahertz radar system to discuss systematic imaging studies on the scaled models based on the improved Back-Projection(BP) algorithm. We image the scaled models with different shapes and are able to distinguish spatial gaps as small as 6 mm. TheTheoretical calculation predicts that the lateral resolution and the axial resolution can be as high as 0.125 mm. Center enhancement and background rings caused by the algorithm in the imaging results are also qualitatively analyzed and are proposed methods to overcome this problem.
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2015, Vol. 4 
