標題: Three-Dimensional Terahertz Tomography With Transistor-Based Signal Source and Detector Circuits Operating Near 300 GHz
作者: Kim, Jungsoo
Yoon, Daekeun
Yun, Jongwon
Song, Kiryong
Kaynak, Mehmet
Tillack, Bernd
Rieh, Jae-Sung
國際半導體學院
International College of Semiconductor Technology
關鍵字: Imaging;receivers;tomography
公開日期: 1-Sep-2018
摘要: In this paper, three-dimensional (3-D) terahertz (THz) tomography was demonstrated with a signal source and imagers based on transistor circuits fabricated with standard semiconductor technologies. For the signal source, a 300-GHz oscillator based on InP HBT technology was employed. For detection, two types of imagers operating near 300 GHz were employed, one direct and the other heterodyne, both realized with SiGe HBT technology. With a set of 2-D images taken from different angles, sinograms and tomograms were obtained, which led to a successful reconstruction of 3-D images of the target object based on the filtered back-projection algorithm. A systematic comparison was made for the direct imager and the heterodyne imager, for which the signal input power and the video bandwidth were varied for both imagers. The results revealed that the heterodyne imager shows a better sensitivity than the direct imager. However, a similar dynamic range of around 30 dB was achieved for both imagers because of a saturation observed for the heterodyne imager when the input power exceeds the threshold. The video bandwidth did not affect the image quality significantly for the bandwidth variation over four orders of magnitude for both imagers.
URI: http://dx.doi.org/10.1109/TTHZ.2018.2851542
http://hdl.handle.net/11536/148140
ISSN: 2156-342X
DOI: 10.1109/TTHZ.2018.2851542
期刊: IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
Volume: 8
起始頁: 482
結束頁: 491
Appears in Collections:Articles