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

doi: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.

Titolo:	A 22W 65% efficiency GaN Doherty power amplifier at 3.5 GHz for WiMAX applications
Autori:	MORENO RUBIO, JORGE JULIAN FANG, JIE QUAGLIA, ROBERTO CAMARCHIA, VITTORIO PIROLA, Marco DONATI GUERRIERI, SIMONA GHIONE, GIOVANNI
Data di pubblicazione:	2011
Abstract:	The design, implementation and characterization of a Doherty Power Amplifier (DPA) for 3.5 GHz Wi...MAX 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.
ISBN:	978-1-4577-0650-9
Appare nelle tipologie:	4.1 Contributo in Atti di convegno

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