4-GHz inter-stage-matched SiGe HBT LNA with gain enhancement and no noise figure degradation

Chin-Chun Meng*, Jhin Ci Jhong

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

An effective way to boost power gain without noise figure degradation in a cascode low noise amplifier (LNA) is demonstrated at 4 GHz using 0.35 μm SiGe HBT technology. This approach maintains the same current consumption because a low-pass π-type LC matching network is inserted in the inter-stage of a conventional cascode LNA. 5 dB gain enhancement with no noise figure degradation at 4 GHz is observed in the SiGe HBT LNA with inter-stage matching.

Original languageEnglish
Pages (from-to)398-400
Number of pages3
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE90-A
Issue number2
DOIs
StatePublished - 1 Jan 2007

Keywords

  • Double quadrature downconverter
  • Gilbert mixer
  • Image rejection
  • Polyphase filter
  • SiGe BiCMOS

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