Drive-characteristic design for dual-input Doherty power amplifiers

Peter Singerl, Thomas Magesacher

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

2 Citations (SciVal)

Abstract

Doherty power amplifiers (PAs) can achieve high efficiency with modulated signals since they exhibit an efficiency-peak in backoff that can, in theory, reach full-scale efficiency. Unfortunately, the backoff efficiency of real Doherty PAs is lowered by unavoidable losses. The purpose of this work is to study the potential of re-gaining some of this efficiency loss through nonlinear drive-curve design for dual-input Doherty PAs. Several drive characteristics are compared in terms of efficiency and linearity performance measured with a modulated signal and applying digital pre-distortion. A single-parameter drive-curve model suitable for analog implementation is proposed that allows the adjustment of the efficiency/linearity tradeoff.

Original languageEnglish
Title of host publication2016 IEEE MTT-S International Microwave Symposium, IMS 2016
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Volume2016-August
ISBN (Electronic)9781509006984
DOIs
Publication statusPublished - 2016 Aug 9
Event2016 IEEE MTT-S International Microwave Symposium, IMS 2016 - San Francisco, United States
Duration: 2016 May 222016 May 27

Conference

Conference2016 IEEE MTT-S International Microwave Symposium, IMS 2016
Country/TerritoryUnited States
CitySan Francisco
Period2016/05/222016/05/27

Subject classification (UKÄ)

  • Telecommunications

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