A WR-3 Band Fundamental Voltage-Controlled Oscillator with a Wide Frequency Tuning Range and High Output Power

Dongkyo Kim, Sanggeun Jeon

Research output: Contribution to journalArticle

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 \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.

Original languageEnglish
Article number8723391
Pages (from-to)2759-2768
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Volume67
Issue number7
DOIs
Publication statusPublished - 2019 Jul 1

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voltage controlled oscillators
Variable frequency oscillators
Tuning
tuning
output
emitters
negative conductance
bandwidth
Bandwidth
oscillations
degeneration
Feedback

Keywords

  • Capacitive degeneration
  • cascode cross-coupled pair
  • terahertz (THz) monolithic integrated circuits
  • voltage-controlled oscillator (VCO)
  • wide frequency tuning range

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

A WR-3 Band Fundamental Voltage-Controlled Oscillator with a Wide Frequency Tuning Range and High Output Power. / Kim, Dongkyo; Jeon, Sanggeun.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 67, No. 7, 8723391, 01.07.2019, p. 2759-2768.

Research output: Contribution to journalArticle

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