2.4/5.7 GHz dual-band high linearity Gilbert upconverter utilizing bias-offset TCA and LC current combiner

Jin Siang Syu*, Chin-Chun Meng

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

A 2.4/5.7 GHz dual-band Gilbert upconversion mixer is demonstrated using 0.35 μm SiGe BiCMOS technology. A bias-offset cross-coupled transconductance amplifier (TCA) is employed in the intermediate frequency port for the linearity improvement. The dual-band LC current combiner and the output shunt-shunt feedback buffer amplifier are in the radio frequency (RF) port. The mechanisms of the high linearity upconverter and the design flow of the dual-band LC current combiner are established in this letter. The dual-band upconverter has conversion gain of 1.5/ - 0.2 dB, OP 1dB of - 10.5/ - 9 dBm, and OIP 3 of 12/13 dBm for IF=100 MHz, RF= 2.4/5.7 GHz, respectively.

Original languageEnglish
Pages (from-to)876-878
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume17
Issue number12
DOIs
StatePublished - 1 Dec 2007

Keywords

  • Dual-band
  • Gilbert mixer
  • LC current combiner
  • Shunt-shunt feedback
  • SiGe heterojunction bipolar transistor (HBT)
  • Transconductance amplifier (TCA)
  • WLAN

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