Characterization of linear power amplifiers for LTE applications
Paper in proceedings, 2018

This paper compares the performance of and analyzes the linearity metrics with different signals for two linear PAs: A single-ended class-AB PA and a linear Doherty PA (DPA). Both PAs utilize the 6 W GaN HEMT CGH40006P at a design frequency of 3 GHz for the class-AB PA and 3.5 GHz for the DPA. Different linearity metrics are studied for a 5-MHz spaced two-tone signal and a 5-MHz Long Term Evolution signal. The DPA has a power added efficiency of 40% whereas the class-AB PA shows 27% given a-40 dBc linearity constraint on the closest adjacent channel (ACPRi). The class-AB PA, however, exhibits better linearity in terms of ACPR2. It is additionally shown that the trends of the linearity metrics for the different signals differ for the two architectures.

AM-PM

class-AB

AM-AM

Doherty

IMD3

Author

William Hallberg

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Paolo Enrico De Falco

University of Bristol

MUSTAFA ÖZEN

University of California

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics, Microwave Electronics

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Zoya Popovic

University of Colorado at Boulder

Taylor Barton

University of Colorado at Boulder

PAWR 2018 - Proceedings 2018 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications

Vol. 2018-January 32-34

2018 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, PAWR 2018
Anaheim, USA,

Energy efficient millimeter wave transmitters

VINNOVA, 2013-11-25 -- 2017-02-28.

Subject Categories

Telecommunications

Control Engineering

Signal Processing

DOI

10.1109/PAWR.2018.8310060

More information

Latest update

1/9/2019 4