Design and characterization of a 1.7?2.7 GHz quasi-MMIC Doherty power amplifier

Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Greene, Mark D., Poulton, Matthew J. and Cripps, Steve C. 2017. Design and characterization of a 1.7?2.7 GHz quasi-MMIC Doherty power amplifier. Presented at: 2017 IEEE MTT-S International Microwave Symposium (IMS), Honololu, HI, USA, 4-9 June 2017. 2017 IEEE MTT-S International Microwave Symposium (IMS). IEEE, pp. 771-773. 10.1109/MWSYM.2017.8058689

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Abstract

This paper presents the design and characterization of a Doherty power amplifier for small cells applications in the 1.7-2.7 GHz band. A quasi-monolithic realization is chosen for its cost advantages when compared to a fully-monolithic solution, and relies on GaN HEMT active devices, but passive networks realized on GaAs substrate. A lumped element Doherty combiner is designed to maximize the bandwidth at which the power amplifier shows high back-off efficiency that results higher than 37% in the 1.7-2.7 GHz band. The dual-input topology permits high flexibility in the optimization of performance, in particular in terms of bandwidth. The fabricated Doherty favourably compares to previously published power amplifiers.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	IEEE
ISBN:	978-1-5090-6360-4
Last Modified:	24 Oct 2022 07:12
URI:	https://orca.cardiff.ac.uk/id/eprint/114328

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