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

Quaglia, Roberto, Powell, Jeff, Chaudhry, Kauser and Cripps, Steve 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: 13 Jun 2022 15:00
URI: https://orca.cardiff.ac.uk/id/eprint/150256

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