Title :
Load modulation for efficiency enhancement of inverse class-D power amplifiers
Author :
El Din, Mohamed Gamal ; Geck, Bernd ; Rolfes, Ilona ; Eul, H.
Author_Institution :
Inst. of Radiofreq. & Microwave Eng., Leibniz Univ. Hannover, Hannover, Germany
Abstract :
This paper presents the implementation of load modulation concept to inverse class-D power amplifiers, additionally an adaptive matching network suitable for differential applications will be presented. A 20 Watt inverse class-D amplifier at 1 GHz was designed and measured, with a maximum power added efficiency of 78%. Through using load modulation the amplifier can achieve a power added efficiency greater than 60% over 11 dB output dynamic range.
Keywords :
UHF power amplifiers; impedance matching; adaptive matching network; frequency 1 GHz; inverse class-D power amplifiers; load modulation; power 20 W; power added efficiency; Antennas;
Conference_Titel :
Antennas and Propagation (MECAP), 2010 IEEE Middle East Conference on
Conference_Location :
Cairo
Print_ISBN :
978-1-61284-903-4
DOI :
10.1109/MECAP.2010.5724207
