Terahertz Signal Source and Receiver Operating near 600 GHz and Their 3-D Imaging Application
- Authors
- Kim, J.; Yoon, D.; Son, H.; Kim, D.; Yoo, J.; Yun, J.; Ng, H.J.; Kaynak, M.; Rieh, J.
- Issue Date
- 5월-2021
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Computed tomography (CT); heterojunction bipolar transistors (HBTs); imaging; oscillators; receivers; transformers
- Citation
- IEEE Transactions on Microwave Theory and Techniques, v.69, no.5, pp.2762 - 2775
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE Transactions on Microwave Theory and Techniques
- Volume
- 69
- Number
- 5
- Start Page
- 2762
- End Page
- 2775
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/128910
- DOI
- 10.1109/TMTT.2021.3061596
- ISSN
- 0018-9480
- Abstract
- In this article, a set of oscillators and a heterodyne image receiver operating near 600 GHz have been developed, each based on a 250-nm InP heterojunction bipolar transistor (HBT) technology and a 130-nm SiGe HBT technology, respectively. The oscillators are based on the common-base cross-coupled push-push topology, which employed coupled-line loads for improved output power and efficiency with a small area. The measured oscillation frequency ranges of the three oscillators with different coupled-line lengths were 628-682, 556-610, and 509-548 GHz, respectively, with a tuning capability achieved with bias variation. The maximum output power and the dc-to-RF efficiency achieved with the oscillators were -10 dBm and 0.19%, respectively. The heterodyne receiver, which consists of a mixer, an IF amplifier, and an IF detector, exhibited a maximum responsivity of 469 kV/W and a minimum noise equivalent power (NEP) of 0.64 pW/Hz1/2. A transmission-mode 3-D THz tomography imaging setup was established with one of the fabricated oscillators and the heterodyne receiver employed as the signal source and the image detector, respectively. With the imaging setup, a successful reconstruction of 3-D images of a target object was demonstrated based on the filtered back-projection algorithm. © 1963-2012 IEEE.
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