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A 2.7-GHz multi-level PWM carrier-bursting RF transmitter

Singerl, Peter; Schuberth, Christian; Mataln, Martin; Seebacher, David; Dielacher, Franz and Magesacher, Thomas LU (2015) 45th European Microwave Conference, EuMC 2015 In European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC p.1124-1127
Abstract

Carrier-bursting is an attractive RF transmitter concept to achieve high efficiency. The power amplifier (PA) itself either operates at its peak efficiency or is turned off. Another efficiency-enhancing approach is the Doherty concept, where the main PA reaches its peak efficiency already in back-off and the peak PA contributes at high input levels to reach the desired output power. In this work, we attempt to combine the best of both concepts and derive a two-level dual-output pulse width modulator driving two PAs whose outputs are combined. We have evaluated the concept by a real-Time FPGA implementation of the modulator for a 2.7GHz carrier driving two Class-AB PAs with a combined peak output power of 30W. The approach exhibits a... (More)

Carrier-bursting is an attractive RF transmitter concept to achieve high efficiency. The power amplifier (PA) itself either operates at its peak efficiency or is turned off. Another efficiency-enhancing approach is the Doherty concept, where the main PA reaches its peak efficiency already in back-off and the peak PA contributes at high input levels to reach the desired output power. In this work, we attempt to combine the best of both concepts and derive a two-level dual-output pulse width modulator driving two PAs whose outputs are combined. We have evaluated the concept by a real-Time FPGA implementation of the modulator for a 2.7GHz carrier driving two Class-AB PAs with a combined peak output power of 30W. The approach exhibits a potentially more pronounced back-off efficiency peak compared to the Doherty concept. Furthermore, the overall efficiency scales with the drain efficiency of the PAs and can thus be improved by employing Class-D or Class-F PAs.

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Please use this url to cite or link to this publication:
author
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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC
pages
4 pages
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
45th European Microwave Conference, EuMC 2015
external identifiers
  • Scopus:84964317926
DOI
10.1109/EuMC.2015.7345965
language
English
LU publication?
yes
id
0ccacadb-a46a-4f99-88bd-b6adb439088e
date added to LUP
2016-10-14 12:58:09
date last changed
2017-01-01 08:36:52
@inproceedings{0ccacadb-a46a-4f99-88bd-b6adb439088e,
  abstract     = {<p>Carrier-bursting is an attractive RF transmitter concept to achieve high efficiency. The power amplifier (PA) itself either operates at its peak efficiency or is turned off. Another efficiency-enhancing approach is the Doherty concept, where the main PA reaches its peak efficiency already in back-off and the peak PA contributes at high input levels to reach the desired output power. In this work, we attempt to combine the best of both concepts and derive a two-level dual-output pulse width modulator driving two PAs whose outputs are combined. We have evaluated the concept by a real-Time FPGA implementation of the modulator for a 2.7GHz carrier driving two Class-AB PAs with a combined peak output power of 30W. The approach exhibits a potentially more pronounced back-off efficiency peak compared to the Doherty concept. Furthermore, the overall efficiency scales with the drain efficiency of the PAs and can thus be improved by employing Class-D or Class-F PAs.</p>},
  author       = {Singerl, Peter and Schuberth, Christian and Mataln, Martin and Seebacher, David and Dielacher, Franz and Magesacher, Thomas},
  booktitle    = {European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC},
  language     = {eng},
  month        = {12},
  pages        = {1124--1127},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {A 2.7-GHz multi-level PWM carrier-bursting RF transmitter},
  url          = {http://dx.doi.org/10.1109/EuMC.2015.7345965},
  year         = {2015},
}