A doherty power amplifier based on a tapered line impedance inverter

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Title:	A doherty power amplifier based on a tapered line impedance inverter
Author:	Mehran, Yahyavi; Bertran Albertí, Eduardo
Other authors:	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CSC - Components and Systems for Communications Research Group
Abstract:	This paper presents a wideband GaN Doherty power amplifier (DPA) in the 2.6 GHz band with a 3 stages Wilkinson splitter where the impedance inverter is based on a tapered line instead of a quarter wave transformer. From the comparison with the same amplifier using a typical quarter-wave transformer as impedance inverter, and keeping both designs the same bandwidth (1.6 to 3.3 GHz, 65% of the fractional bandwidth), the Power Added Efficiency (PAE) is enhanced up to 50% (from 40.46% to 61.17% at 35 dBm input power) in the DPA with a tapered line. Besides, the transducer gain remains practically unaltered.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria electrònica -Power amplifiers -GaN -Doherty power amplifier (DPA) -Power Added Efficiency (PAE) -Tapered line -Amplificadors de potència
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Document type:	Article - Published version Conference Object
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