A 5-w gan doherty amplifier for ka-band satellite downlink with 4-ghz bandwidth and 17-db npr

Piacibello, Anna, Giofre, Rocco, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Figueiredo, Ricardo, Carvalho, Nuno, Colantonio, Paolo, Valenta, Vaclav and Camarchia, Vittorio 2022. A 5-w gan doherty amplifier for ka-band satellite downlink with 4-ghz bandwidth and 17-db npr. IEEE Microwave and Wireless Components Letters 32 (8) , pp. 964-967. 10.1109/LMWC.2022.3160227

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Abstract

This letter presents the design and experimental characterization of a GaN–Si monolithic Doherty power amplifier (PA) for the Ka -band satellite downlink. The fabricated amplifier favorably compares with the current state of the art, achieving from 16.3 to 20.3 GHz (4 GHz, 22% relative bandwidth), a record band to date, 36.6–37.7-dBm output power, 23%–31% power-added efficiency, 18–22-dB gain at saturation, and around 20% power-added efficiency at 6-dB output back-off. At 18.8 GHz, the amplifier shows a noise-to-power ratio higher than 17 dB at all power levels, making it suitable for satellite applications where additional linearization is usually unfeasible.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	1531-1309
Date of Acceptance:	13 March 2022
Last Modified:	02 Nov 2022 17:00
URI:	https://orca.cardiff.ac.uk/id/eprint/153909

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