Investigations of Active Antenna Doherty Power Amplifier Modules Under Beam-Steering Mismatch
Artikel i vetenskaplig tidskrift, 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)


Active antenna array

mutual coupling

antenna crosstalk


Bersant Gashi

Fraunhofer-Institut für Angewandte Festkörperphysik

Sebastian Krause

Fraunhofer-Institut für Angewandte Festkörperphysik

Rudiger Quay

Fraunhofer-Institut für Angewandte Festkörperphysik

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Oliver Ambacher

Fraunhofer-Institut für Angewandte Festkörperphysik

IEEE Microwave and Wireless Components Letters

1531-1309 (ISSN) 15581764 (eISSN)

Vol. 28 10 930-932 8456678




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