Emulation of Doherty Amplifiers Using Single- Amplifier Load-Pull Measurements
Journal article, 2020

A measurement-based approach for the analysis of Doherty power amplifiers (DPAs) is presented. The DPA behavior is emulated using an active load-pull setup, exciting a single device under test (DUT) in either of two states, corresponding to the main and auxiliary branches in a DPA. The dynamic loading condition in one state is determined from the Doherty combiner parameters and the knowledge of the DUT behavior in the other state. By iterating between these states, the measurements converge to the true behavior of a complete DPA. This method provides measurement-based insights in the dynamic loading conditions and the corresponding individual device performance without having to manufacture the full DPA. The method is demonstrated by emulating and cross-verifying a 2.14-GHz DPA.

emulation

measurement technique

Active load-pull

Doherty power amplifier (DPA)

Author

William Hallberg

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Dhecha Nopchinda

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Christian Fager

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

Koen Buisman

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

IEEE Microwave and Wireless Components Letters

1531-1309 (ISSN)

Vol. 30 1 47-49 8933328

Subject Categories

Applied Mechanics

Medical Equipment Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/LMWC.2019.2955065

More information

Latest update

2/4/2020 1