Co-designed high-efficiency GaN filter power amplifier

Jose Antonio Estrada*, Pedro De Paco, Seth Johannes, Dimitra Psychogiou, Zoya Popovic

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review


In this paper, we demonstrate a high-efficiency 4.7 GHz 4-W power amplifier with input and output matching networks designed as complex-impedance port filters, within a sub-6 GHz 5G band. The port impedances are determined by the load- and source-pull of a GaN HEMT for an efficiency-power tradeoff. The measured performance shows PAE=55% over a 9% fractional bandwidth, with 10 dB rejection at 4.5 and 5 GHz. Comparison with a cascaded PA-filter circuit shows 25% lower loss with a simultaneous 20% reduction in footprint.

Original languageAmerican English
Pages (from-to)115-118
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
Publication statusPublished - Aug 2020


  • 5G
  • Ceramic
  • Coaxial resonators
  • GaN
  • Power amplifiers
  • RF filters


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