10-GHz SiGe BiCMOS sub-harmonic gilbert mixer using the fully symmetrical and time-delay compensated LO cells

Tzung Han Wu*, Chin-Chun Meng

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A 10-GHz sub-harmonic Gilbert mixer is demonstrated in this paper using the 0.35 μm SiGe BiCMOS technology. The time-delay when the sub-harmonic LO (Local Oscillator) stage generates sub-harmonic LO signals is compensated by using fully symmetrical multiplier pairs. High RF-to-IF isolation and sub-harmonic LO Gilbert cell with excellent frequency response can be achieved by the elimination of the time-delay. The SiGe BiCMOS sub-harmonic micromixer exhibits 17 dB conversion gain, -74 dB 2LO-to-RF isolation, IP1 dB of -20 dBm, and IIP3 of -10 dBm. The measured double sideband noise figure is 16 dB from 100-kHz to 100-MHz because the SiGe bipolar device has very low 1/f noise corner.

Original languageEnglish
Pages (from-to)326-332
Number of pages7
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE90-A
Issue number2
DOIs
StatePublished - 1 Jan 2007

Keywords

  • 2LO-to-RF isolation
  • Gilbert mixer
  • Mixer low frequency noise
  • Self-mixing
  • SiGe BiCMOS
  • Sub-harmonic mixer

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