Effect of HEMT output characteristics on the load mismatch resilience in balanced power amplifiers

Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Powell, Jeff, Chaudhry, Kauser and Cripps, Steve ORCID: https://orcid.org/0000-0002-2258-951X 2022. Effect of HEMT output characteristics on the load mismatch resilience in balanced power amplifiers. Presented at: 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC), Cardiff, Wales, 07-08 April 2022. 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE, pp. 1-3. 10.1109/INMMiC54248.2022.9762184

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Abstract

This paper provides a detailed study of the ability of balanced power amplifiers to maintain reasonable performance under output load mismatch when compared to single-stage or parallel-combined power amplifiers. In particular, it shows how the classical device approximation as a voltage controlled current source provides misleading results, especially when approaching saturation. On the other hand, a simple device model based on a static polynomial approximation of the output current vs. voltage characteristics is sufficient to capture a realistic response of the amplifier, verified against a full non-linear model of a GaN high electron mobility transistor.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	IEEE
ISBN:	9781665478458
Last Modified:	06 May 2023 01:13
URI:	https://orca.cardiff.ac.uk/id/eprint/150256

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