Title :
A Saturated Doherty Power Amplifier Based On Saturated Amplifier
Author :
Kim, Jangheon ; Son, Junghwan ; Moon, Junghwan ; Kim, Bumman
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
A saturated Doherty power amplifier (PA) based on the saturated PA tuned by the self-generated harmonic currents is presented. When driven with mobile WiMAX 1FA signal, this Doherty PA demonstrates high efficiency performance (average 57%) over the WiMAX band from 2.5 GHz to 2.7 GHz. Simulated and experimental results allow the evaluation for the load modulation behavior of the saturated PA and bandwidth correlation between the Doherty and saturated unit PAs. The linearity requirement of the WiMAX signal is met using the digital feedback predistortion linearization technique.
Keywords :
WiMax; linearisation techniques; microwave amplifiers; power amplifiers; bandwidth 2.5 GHz to 2.7 GHz; digital feedback predistortion linearization technique; mobile WiMAX 1FA signal; saturated Doherty power amplifier; self-generated harmonic currents; Doherty amplifier; efficiency; linearity; power amplifier (PA); predistortion (PD); worldwide interoperability for microwave access (WiMAX);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2009.2038554
