Symmetrical Doherty Power Amplifier With Extended Efficiency Range
Artikel i vetenskaplig tidskrift, 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.

Combiner synthesis

efficiency

Doherty power amplifier (PA)

Författare

MUSTAFA ÖZEN

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

K. Andersson

Ericsson, Göteborg

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 64 4 1273-1284

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/tmtt.2016.2529601