Improving power amplifier efficiency and linearity using a dynamically controlled tunable matching network

Jia Shiang Fu, Amir Mortazawi

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

This paper presents a tunable matching network that enhances both efficiency and linearity of power amplifiers (PAs). A medium-power amplifier with a varactor-based matching network is designed, fabricated, and tested. It is demonstrated that not only the power efficiency at reduced drive levels can be improved but also the AMAM and AMPM distortions of the PA are reduced when the tunable matching network is biased according to the input drive level. Moreover, under 3GPP WCDMA modulated input, the PA with a dynamically controlled tunable matching network achieves up to 5% improvement in drain efficiency when compared with a PA employing a fixed matching network.

Original languageEnglish
Article number4682653
Pages (from-to)3239-3244
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Volume56
Issue number12
DOIs
StatePublished - Dec 2008

Keywords

  • Efficiency
  • Linearity
  • Power amplifiers (PAs)
  • Tunable matching networks

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