TY - JOUR
T1 - A WR-3 Band Fundamental Voltage-Controlled Oscillator with a Wide Frequency Tuning Range and High Output Power
AU - Kim, Dongkyo
AU - Jeon, Sanggeun
N1 - Funding Information:
Manuscript received December 6, 2018; revised March 11, 2019; accepted April 22, 2019. Date of publication May 27, 2019; date of current version July 1, 2019. This work was supported in part by the Defense Acquisition Program Administration through a grant to the Terahertz Electronic Device Research Laboratory and in part by the Agency for Defense Development under Grant UD180025RD. (Corresponding author: Sanggeun Jeon.) The authors are with the School of Electrical Engineering, Korea University, Seoul 02841, South Korea (e-mail: sgjeon@korea.ac.kr).
PY - 2019/7
Y1 - 2019/7
N2 - 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 \text{m} InP DHBT technology ( f-{\mathrm {T}}/f-{\mathrm {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.
AB - 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 \text{m} InP DHBT technology ( f-{\mathrm {T}}/f-{\mathrm {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.
KW - Capacitive degeneration
KW - cascode cross-coupled pair
KW - terahertz (THz) monolithic integrated circuits
KW - voltage-controlled oscillator (VCO)
KW - wide frequency tuning range
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U2 - 10.1109/TMTT.2019.2916836
DO - 10.1109/TMTT.2019.2916836
M3 - Article
AN - SCOPUS:85068443688
VL - 67
SP - 2759
EP - 2768
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
SN - 0018-9480
IS - 7
M1 - 8723391
ER -