Dynamically load modulated power amplifier using transistor source impedance variation

Pouria Pazhouhesh, Jennifer Kitchen

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

Abstract

This work presents a novel dynamic load modulation (DLM) power amplifier that does not require an input power splitter. The load is modulated using an auxiliary transistor's source impedance variation with output power. A proof of concept circuit is designed and simulated in a 65 nm TSMC CMOS technology. The transconductance (gm) of the auxiliary transistor is used as the PA's load modulator. Operating from 2.3-2.5 GHz, the DLM PA demonstrates an output power of 10.4 dBm at 2.5 dB compression and a maximum gain of about 20 dB. The PA's power added efficiency (PAE) is 27% at the peak power and 20% at 6 dB output power back off. Output power combining is realized using an unequal lumped-element Wilkinson power combiner. The presented DLM PA has compact size because it does not require an input power splitter.

Original languageEnglish (US)
Title of host publicationProceedings of the 2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems
Subtitle of host publicationMaking Waves in Texas, WMCS 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728161921
DOIs
StatePublished - May 2020
Externally publishedYes
Event2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2020 - Virtual, Online, United States
Duration: May 26 2020May 28 2020

Publication series

NameProceedings of the 2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems: Making Waves in Texas, WMCS 2020

Conference

Conference2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2020
Country/TerritoryUnited States
CityVirtual, Online
Period5/26/205/28/20

Keywords

  • CMOS
  • Class B
  • Doherty
  • Dynamic Load Modulation (DLM)
  • Power Amplifier
  • Power Splitter

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Instrumentation

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