Investigations of Active Antenna Doherty Power Amplifier Modules Under Beam-Steering Mismatch
Journal article, 2018

This letter investigates the performance of a Doherty power amplifier (DPA) in an 8 x 1 active antenna transmitter module under an average voltage-standing-wave ratio of 4 : 1 induced by the array 1-D beam steering and mutual coupling. The GaN-based DPA and a 2 x 1 segment of the array are verified via measurements at the operating frequency of 3.5 GHz. The co-design and co-simulation of both the antenna array and the behavioral model of the DPA show that the inherent back-off efficiency benefit-when compared to traditionally used class-AB and -B amplifiers in base stations-can be maintained when restricting the beam-steering angle, in this case theta is an element of [-45 degrees, 45 degrees], and operational bandwidth of the combined system.

Doherty power amplifier (DPA)

beam steering

voltage-standing-wave ratio (VSWR)

GaN

Active antenna array

mutual coupling

antenna crosstalk

Author

Bersant Gashi

Fraunhofer Institute for Applied Solid State Physics

Sebastian Krause

Fraunhofer Institute for Applied Solid State Physics

Rudiger Quay

Fraunhofer Institute for Applied Solid State Physics

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Oliver Ambacher

Fraunhofer Institute for Applied Solid State Physics

IEEE Microwave and Wireless Components Letters

1531-1309 (ISSN)

Vol. 28 10 930-932

Subject Categories

Telecommunications

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/LMWC.2018.2864879

More information

Latest update

3/19/2019