High-gain and high-linearity MMIC GaN Doherty Power Amplifier with 3-GHz bandwidth for Ka-band satellite communications

Piacibello, Anna, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Giofre, Rocco, Figueiredo, Ricardo, Colantonio, Paolo, Carvalho, Nuno Borges, Valenta, Vaclav and Camarchia, Vittorio 2024. High-gain and high-linearity MMIC GaN Doherty Power Amplifier with 3-GHz bandwidth for Ka-band satellite communications. IEEE Microwave and Wireless Technology Letters 10.1109/LMWT.2024.3384306

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Abstract

This letter presents the design of a Doherty power amplifier (DPA) for satellite applications in the Ka -band downlink (17.3–20.3 GHz) implemented on a 100-nm GaN–Si HEMT technology. The design aims to achieve high gain and very high intrinsic linearity over a wide bandwidth of 3 GHz. The experimental characterization on the fabricated chip demonstrates that the DPA can maintain a noise-to-power ratio (NPR) higher than 25 dB and power-added efficiency (PAE) of 30% while providing 36 dBm of output power, when tested with a 100-MHz uniformly distributed signal, achieving state-of-the-art performance among the integrated power amplifiers for satellite communications.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Engineering
Publisher:	IEEE
ISSN:	2771-957X
Date of First Compliant Deposit:	11 April 2024
Date of Acceptance:	27 March 2024
Last Modified:	15 Apr 2024 14:00
URI:	https://orca.cardiff.ac.uk/id/eprint/167888

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