10-GHz highly symmetrical sub-harmonic Gilbert mixer using GaInP/GaAs HBT technology

Tzung Han Wu*, Chin-Chun Meng

*Corresponding author for this work

Research output: Contribution to journalArticle

16 Scopus citations


A 10-GHz sub-harmonic Gilbert mixer is demonstrated using GaInP/GaAs hetero-junction bipolar transistor technology. The local oscillator (LO) signal time-delay path in the sub-harmonic LO stage is compensated using the fully symmetrical stacked-LO doubler; therefore, the balance of the sub-harmonic LO stage, the radio frequency to intermediate frequency isolation, and IIP 2 are improved. The demonstrated 10-GHz sub-harmonic mixer achieves 10 dB conversion gain, IP 1dB of -12 dBm, IIP 3 of 2 dBm and IIP 2 of 33 dBm.

Original languageEnglish
Pages (from-to)370-372
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number5
StatePublished - 1 May 2007


  • 1/f noise
  • Micromixer
  • Port-to-port isolation
  • Sub-harmonic Gilbert mixer
  • Time-delay-compensated doubler

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