A multilevel pulse-width modulated class-e power amplifier

Mahdi Javid, Jennifer Kitchen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


This work reports a Class-E pulse-width modulated RF power amplifier that uses multilevel discrete supply modulation for base station applications. This work quantifies the efficiency roll-off in multilevel PAs and proposes that pulse-width modulated (PWM) class-E PAs offer the best efficiency roll-off and dynamic range, based on the efficiency profile with power back-off (PBO). The presented technique significantly extends the PBO dynamic range of PWM PAs over prior state-of-the-art solutions. A proof of concept watt-level class-E PA is designed using a GaN HEMT and exhibits more than 65% efficiency at 15dB PBO. This design extends the dynamic range of a PWM class-E PA to more than 6dB for a 50 to 30 percent duty cycle variation, and offers an efficiency roll-off of less than 4% per dB. The proposed circuit demonstrates an increasing average drain efficiency with power back-off when reducing the PA supply voltage.

Original languageEnglish (US)
Title of host publication2019 IEEE Radio and Wireless Symposium, RWS 2019
PublisherIEEE Computer Society
ISBN (Electronic)9781538659441
StatePublished - May 14 2019
Event2019 IEEE Radio and Wireless Symposium, RWS 2019 - Orlando, United States
Duration: Jan 20 2019Jan 23 2019

Publication series

NameIEEE Radio and Wireless Symposium, RWS
ISSN (Print)2164-2958
ISSN (Electronic)2164-2974


Conference2019 IEEE Radio and Wireless Symposium, RWS 2019
Country/TerritoryUnited States


  • Class-e
  • Dynamic range
  • Efficiency
  • Gan
  • Pulsewidth modulation
  • Rf power amplifiers
  • Supply modulation

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Communication


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