A New Design Technique for Power Amplifiers Operating Close to Unit-Current-Gain Cutoff Frequency

Yi Fan Tsao, Chien Ming Tsao, Heng Tung Hsu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we presented the design and implementation of a two-stage power amplifier (PA) operating at a frequency close to 90% of the unit-current-gain cutoff frequency (fT). Instead of the conventional configuration where inductors and capacitors were adopted as the matching components, a simple yet novel topology composed of transmission lines as matching components was proposed. Optimum choice of the transmission line parameters minimized the matching loss which in turn pushed the operating frequency toward the limit. Implemented in standard 0.15-μmGaAs pHEMT technology, the measurement results exhibited good performance making such approach feasible for PA designs beyond millimetre-wave frequencies.

Original languageEnglish
Title of host publication2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665433914
DOIs
StatePublished - 25 Aug 2021
Event2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021 - Hualien, Taiwan
Duration: 25 Aug 202127 Aug 2021

Publication series

Name2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021

Conference

Conference2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021
Country/TerritoryTaiwan
CityHualien
Period25/08/2127/08/21

Keywords

  • GaAspHEMT
  • cutoff frequency
  • power amplifier
  • transmission line

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