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A comparison of polar transmitter architectures using a GaN HEMT power amplifier
Lund University.ORCID iD: 0000-0001-9188-4566
Lund University.
Victoria University.
Victoria University.
2008 (English)In: 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008., IEEE Press, 2008, 1075-1078 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper three transmitter architectures are compared, that each use the low-frequency envelope and high-frequency phase component of an RF signal. A power amplifier (PA) with Pulse Width Modulation by Variable Gate Bias (PWMVGB) is compared to an Envelope Elimination and Restoration (EER) and Envelope Tracking (ET) configuration. The test circuit is implemented using a discrete GaN HEMT power amplifier and discrete surface-mount passive components assembled on a PCB. Measurements show that the EER architecture maintains a drain efficiency of 56 to 69% for a wide output power range, while the PA with variable gate bias shows a significant drop in efficiency for lower output powers (from 59 to 6%). Other comparison issues are modulation of the supply voltage and transmitter complexity.

Place, publisher, year, edition, pages
IEEE Press, 2008. 1075-1078 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Physics, Electrotechnology
Identifiers
URN: urn:nbn:se:lnu:diva-29912DOI: 10.1109/ICECS.2008.4675043ISBN: 978-1-4244-2181-7 (print)OAI: oai:DiVA.org:lnu-29912DiVA: diva2:659034
Conference
The 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008, Malta, Aug. 31 2008-Sept. 3, 2008
Available from: 2013-10-23 Created: 2013-10-22 Last updated: 2013-11-05Bibliographically approved

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Cijvat, Ellie

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf