The design, implementation and characterization of a Doherty Power Amplifier (DPA) for 3.5 GHz WiMAX applications are discussed. The DPA has been implemented using a commercial GaN HEMT from Cree inc., following a class AB and C scheme for the main and peak module, respectively. The measured maximum power of the DPA is 22W with a first peak efficiency of 57%, and maximum drain efficiency of 65% at the DPA saturation. Efficiency over the so-called Doherty region (where both the main and the peak amplifiers operate) does not drop below 55% from saturation to 6 dB input back-off. The gain at the onset of the Doherty region is 8 dB, with around 1 dB roll-off.

A 22W 65% efficiency GaN Doherty power amplifier at 3.5 GHz for WiMAX applications / MORENO RUBIO, JORGE JULIAN; Fang, Jie; Quaglia, Roberto; Camarchia, Vittorio; Pirola, Marco; DONATI GUERRIERI, Simona; Ghione, Giovanni. - ELETTRONICO. - Unico:(2011), pp. 101-104. ((Intervento presentato al convegno Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2011 Workshop on tenutosi a Wien (AT) nel 18-19 April 2011 [10.1109/INMMIC.2011.5773332].

A 22W 65% efficiency GaN Doherty power amplifier at 3.5 GHz for WiMAX applications

MORENO RUBIO, JORGE JULIAN;FANG, JIE;QUAGLIA, ROBERTO;CAMARCHIA, VITTORIO;PIROLA, Marco;DONATI GUERRIERI, Simona;GHIONE, GIOVANNI
2011

Abstract

The design, implementation and characterization of a Doherty Power Amplifier (DPA) for 3.5 GHz WiMAX applications are discussed. The DPA has been implemented using a commercial GaN HEMT from Cree inc., following a class AB and C scheme for the main and peak module, respectively. The measured maximum power of the DPA is 22W with a first peak efficiency of 57%, and maximum drain efficiency of 65% at the DPA saturation. Efficiency over the so-called Doherty region (where both the main and the peak amplifiers operate) does not drop below 55% from saturation to 6 dB input back-off. The gain at the onset of the Doherty region is 8 dB, with around 1 dB roll-off.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2422118
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