Archivio Istituzionale della RicercaThis 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.
A 5-W GaN Doherty Amplifier for Ka-Band Satellite Downlink With 4-GHz Bandwidth and 17-dB NPR / Piacibello, A.; Giofre, R.; Quaglia, R.; Figueiredo, R.; Carvalho, N.; Colantonio, P.; Valenta, V.; Camarchia, V.. - In: IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS. - ISSN 1531-1309. - STAMPA. - 32:8(2022), pp. 964-967. [10.1109/LMWC.2022.3160227]
A 5-W GaN Doherty Amplifier for Ka-Band Satellite Downlink With 4-GHz Bandwidth and 17-dB NPR
Piacibello A.;Camarchia V.
2022
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.
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https://hdl.handle.net/11583/2961521