Symmetrical Doherty Power Amplifier With Extended Efficiency Range
Journal article, 2016

A symmetrical Doherty power amplifier (PA) with an extended efficiency range is proposed. This paper proves the existence of a class of symmetrical Doherty PAs having efficiency peaks for back-off levels larger than 6 dB. A design technique is developed that maintains the full voltage and current swings of both the main and auxiliary transistors. The concept is experimentally verified in a 1.95-GHz 25-W circuit demonstrator fabricated using identical GaN HEMT devices. An average power-added efficiency of 50% and adjacent power leakage ratio of -49 dBc is obtained with 9-dB peak-to-average power-ratio 20-MHz long-term evolution test signals.

efficiency

Combiner synthesis

Doherty power amplifier (PA)

Author

MUSTAFA ÖZEN

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

K. Andersson

Ericsson AB

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 64 4 1273-1284

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/tmtt.2016.2529601

More information

Latest update

9/6/2018 1