A WR-3 Band Fundamental Voltage-Controlled Oscillator With a Wide Frequency Tuning Range and High Output Power
- Authors
- Kim, Dongkyo; Jeo, Sanggeun
- Issue Date
- 7월-2019
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Capacitive degeneration; cascode cross-coupled pair; terahertz (THz) monolithic integrated circuits; voltage-controlled oscillator (VCO); wide frequency tuning range
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.67, no.7, pp.2759 - 2768
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
- Volume
- 67
- Number
- 7
- Start Page
- 2759
- End Page
- 2768
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/64230
- DOI
- 10.1109/TMTT.2019.2916836
- ISSN
- 0018-9480
- Abstract
- This paper presents a 300-GHz voltage-controlled oscillator (VCO) with a wide frequency tuning range and high output power. To generate fundamental oscillation at 300 GHz, a cascode cross-coupled pair is employed as a VCO core instead of a conventional common-emitter pair. Capacitive emitter degeneration is added to the VCO core to achieve a wide bandwidth of a negative conductance. In addition, the phase of the oscillation feedback loop is analyzed and optimized to further extend the tuning range. The VCO is fabricated in a 0.25-mu m InP DHBT technology (f(T)/f(max) = 392/859 GHz). Measurements show that the VCO frequency is tuned from 272.4 to 310.8 GHz with a peak output power of 1.5 dBm. To the best of authors' knowledge, this is the widest tuning range of 38.4 GHz (a fractional bandwidth of 13.2%) among the reported fundamental VCOs at the WR-3 band.
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