Citation
García Suárez, Oscar and Vasic, Miroslav and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and Cobos Márquez, José Antonio
(2012).
An overview of fast DC-DC converters for envelope amplifier in RF transmitters.
In: "Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC)", 05/02/2012 - 09/02/2012, Orlando, Florida, USA. pp. 1313-1318.
https://doi.org/10.1109/APEC.2012.6165989.
Abstract
In the last years, RF power amplifiers are taking advantage of the switched dc-dc converters to use them in several architectures that may improve the efficiency of the amplifier, keeping a good linearity. The use of linearization techniques such as Envelope Elimination and Restoration (EER) and Envelope Tracking (ET) requires a very fast dc-dc power converter to provide variable voltage supply to the power amplifier but theoretically the efficiency can be much higher than using the classical amplifiers belonging to classes A, B or AB. The purpose of this paper is to analyze the state of the art of the power converters used as envelope amplifiers in this application where a fast output voltage variation is required. The power topologies will be explored and several important parameters such as efficiency, bandwidth and output voltage range will be discussed.
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