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A 22W 65% efficiency GaN Doherty Power Amplifier at 3.5 GHz for WiMAX applications

Moreno Rubio, Jorge ORCID:, Fang, Jie, Quaglia, R. ORCID:, Camarchia, V., Pirola, M., Donati Guerrieri, S. and Ghione, G. 2011. A 22W 65% efficiency GaN Doherty Power Amplifier at 3.5 GHz for WiMAX applications. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, Vienna, Austria, 18-19 April 2011. Integrated Nonlinear Microwave and Millimeterwave Circuits, INMMIC, International Workshop on. IEEE, p. 1. 10.1109/INMMIC.2011.5773332

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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.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Engineering
Publisher: IEEE
ISBN: 9781457706509
Last Modified: 04 Nov 2022 12:15

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