A push-push VCO with 13.9-GHz wide tuning range using loop-ground transmission line for full-band 60-GHz transceiver

Takahiro Nakamura, Toru Masuda, Katsuyoshi Washio, Hiroshi Kondoh

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

A 59-GHz push-push voltage-controlled oscillator (VCO)-based on 0.18-μm SiGe BiCMOS technologyfor a full-band 60-GHz transceiver was developed. The VCO uses a loop-ground transmission line (LG-TML) composed of λ fo/ 2 signal lines (half wavelength at fundamental frequency) and λ 2fo/4 secondary lines (quarter wavelength at second harmonic frequency). The LG-TML makes it possible to output both a large signal at second harmonic frequency and an adequate signal at the fundamental frequency for driving a prescalar, while it prevents the Miller effect of the HBTs in the VCO from increasing and negative conductance from being reduced. As a result, the VCO achieves high output power of +1.5 dBm, while maintaining wide tuning range of 13.9 GHz (26% of the center oscillation frequency). Moreover, it exhibits a low phase noise of -108 dBc/Hz at a 1-MHz offset frequency and achieves a state-of-the-art figure of merit (FOM T) of -189.6 dB.

Original languageEnglish
Article number6177281
Pages (from-to)1267-1277
Number of pages11
JournalIEEE Journal of Solid-State Circuits
Volume47
Issue number6
DOIs
Publication statusPublished - 2012 Apr 5

Keywords

  • IEEE 802.15.3c
  • SiGe BiCMOS
  • VCO
  • loop-ground transmission line
  • millimeter-wave communication
  • push-push VCO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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