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AM/PM characterization of wideband power amplifiers

Piacibello, Anna, Moreno Rubio, Jorge Julian, Quaglia, Roberto ORCID: and Camarchia, Vittorio 2022. AM/PM characterization of wideband power amplifiers. Presented at: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), Las Vegas, NV, USA, 16-19 January 2022. Proceedings of IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications. IEEE, 10.1109/PAWR53092.2022.9719787

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This paper presents the linearity assessment of two state-of-the-art wideband power amplifiers, a single stage class AB and a two-way 6 dB Doherty, in terms of amplitude-to-phase-modulation (AM/PM) distortion. The simulated and measured characteristics are shown and discussed. The class AB amplifier maintains AM/PM within 6° from 1 to 4 GHz, i.e. on a 120% bandwidth, while the Doherty amplifier has similar performance from 2.2 to 2.9 GHz, i.e. on a 28 % bandwidth. This characterization campaign highlights the superior linearity of the class AB amplifier over relative bandwidths that exceed 100% but, at the same time, the potential of the Doherty amplifier to maintain very limited (within 10°) amplitude-to-phase-modulation distortion over bandwidths up to around 60 %. Both power amplifiers are well in line with the state of the art also in terms of linearity, besides output power, gain, and efficiency performance.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: IEEE
ISBN: 9781665434737
ISSN: 2164-8751
Date of First Compliant Deposit: 13 January 2023
Last Modified: 03 Mar 2023 02:30

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