A 2.7-GHz multi-level PWM carrier-bursting RF transmitter
(2015) 45th European Microwave Conference, EuMC 2015 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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- author
- Singerl, Peter ; Schuberth, Christian ; Mataln, Martin ; Seebacher, David ; Dielacher, Franz and Magesacher, Thomas LU
- organization
- publishing date
- 2015-12-03
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC
- article number
- 7345965
- pages
- 4 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- 45th European Microwave Conference, EuMC 2015
- conference location
- Paris, France
- conference dates
- 2015-09-07 - 2015-09-10
- external identifiers
-
- scopus:84964317926
- ISBN
- 9782874870392
- 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
- 2022-01-30 06:45:46
@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}}, isbn = {{9782874870392}}, language = {{eng}}, month = {{12}}, pages = {{1124--1127}}, publisher = {{IEEE - 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}}, doi = {{10.1109/EuMC.2015.7345965}}, year = {{2015}}, }