5.2-GHz GaInP/GaAs HBT cascode LNA with 5.5 dB gain enhancement using inter-stage LC matching

Chin-Chun Meng*, J. C. Jhong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A gain boosting method without noise-figure degradation by optimizing interstage matching in a cascode low-noise amplifier (LNA) with emitter-degeneration inductor is demonstrated at 5.2 GHz using 2-μm GaInP/GaAs HBT technology. A low-pass LC matching network is inserted in the interstage of a conventional cascode LNA with emitter-degeneration-inductor to enhance the gain with the same current consumption. The 2-μu GaInP/GaAs HBT LNA without interstage matching has 14-dB power gain and 2.37-dB noise figure at 5.2 GHz while the 2-μm GaInP/GaAs HBT LNA with interstage matching has 19.5-dB power gain and 2.22-dB noise figure at 5.2 GHz. The current consumption is 2.3 mA and voltage supply is 3.6 V.

Original languageEnglish
Pages (from-to)1499-1501
Number of pages3
JournalMicrowave and Optical Technology Letters
Volume48
Issue number8
DOIs
StatePublished - 1 Aug 2006

Keywords

  • Cascode
  • Emitter inductive degeneration
  • GaInP/GaAs HBT
  • LNA
  • Noise

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