Design and experimental characterization of an asymmetric GaN MMIC Doherty power amplifier for Ka-Band transmitters

Azad, Ehsan M., Chaudhry, Kauser A., Gannicliffe, Joe and Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X 2024. Design and experimental characterization of an asymmetric GaN MMIC Doherty power amplifier for Ka-Band transmitters. Presented at: 19th European Microwave Integrated Circuits Conference (EuMIC), Paris, France, 23-24 September 2024. 2024 19th European Microwave Integrated Circuits Conference (EuMIC). IEEE, pp. 158-161. 10.23919/eumic61603.2024.10732357

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Abstract

This paper presents the design and experimental characterization of an asymmetric Ka-Band Doherty power amplifier based on a 0.12 µm GaN MMIC process. The design relies on the identification of an optimum load modulation trajectory on the load-pull contours of the main PA. The fabricated prototype shows a peak output power of 34 dBm and an 8-dB back-off power added efficiency of 17% at 28.3 GHz. When tested with a 100 MHz channel 5G signal, the amplifier demonstrates good intrinsic linearity and it is linearizable using digital predistortion.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	IEEE
ISBN:	978-2-87487-078-1
Last Modified:	11 Nov 2024 11:15
URI:	https://orca.cardiff.ac.uk/id/eprint/173812

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