New general formulation and experimental verification of harmonic clipping contours in high-frequency power devices

Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Bell, James J. ORCID: https://orcid.org/0000-0002-4815-2199 and Cripps, Steve ORCID: https://orcid.org/0000-0002-2258-951X 2017. New general formulation and experimental verification of harmonic clipping contours in high-frequency power devices. IEEE Transactions on Microwave Theory and Techniques 65 (10) , pp. 3903-3909. 10.1109/TMTT.2017.2687900

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Abstract

This paper presents a novel closed form solution for the theoretical calculation of harmonic clipping contours when an arbitrary number of harmonics is considered. The clipping contours can be used to design the loads of a high frequency power device in order to avoid drain current clipping, hence preventing strong non-linear effects. For the first time the predicted second harmonic contours are validated thoroughly by means of experimental characterization of GaN HEMT devices. The measured contours result in good agreement with the theory. Moreover, the effect of third harmonic load tuning is also assessed, and verified for the first time. These results prove that the clipping contours can be used as a tool for the systematic design of low distortion power amplifiers.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Uncontrolled Keywords:	Field-effect transistors, high-efficiency amplifiers, power amplifiers (PAs).
Additional Information:	This is an open access article under the terms of the CC-BY Attribution 4.0 International license.
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
ISSN:	0018-9480
Date of First Compliant Deposit:	28 March 2017
Date of Acceptance:	20 March 2017
Last Modified:	05 May 2023 02:35
URI:	https://orca.cardiff.ac.uk/id/eprint/99407

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