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A design strategy for AM/PM compensation in GaN Doherty power amplifiers

Camarchia, Vittorio, Colantonio, Paolo, Giannini, Franco, Giofre, Rocco, JIang, Tao, Pirola, Marco, Quaglia, Roberto ORCID: and Ramella, Chiara 2017. A design strategy for AM/PM compensation in GaN Doherty power amplifiers. IEEE Access 5 , pp. 22244-22251. 10.1109/ACCESS.2017.2759164

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This paper presents the theoretical analysis of phase distortion (AM/PM) mechanisms in Gallium Nitride (GaN) Doherty power amplifiers (DPAs) and a novel approach to optimize the tradeoff between linearity and efficiency. In particular, it is demonstrated how it is possible to mitigate the AM/PM by designing a suitable mismatch at the input of the active devices, based on the identification of constant AM/PM and gain contour circles. The proposed theory is experimentally confirmed by source- and load-pull measurements and further validated through the design and realization of a 7 GHz 10 W DPA based on GaN monolithic technology.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 2169-3536
Date of First Compliant Deposit: 3 October 2017
Date of Acceptance: 28 September 2017
Last Modified: 03 May 2023 03:39

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