On the extension of the continuous class-F mode power amplifier

Carrubba, Vincenzo, Clarke, Alan Leslie, Akmal, Muhammad, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Benedikt, Johannes ORCID: https://orcid.org/0000-0002-9583-2349, Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 and Cripps, Stephen Charles ORCID: https://orcid.org/0000-0002-2258-951X 2011. On the extension of the continuous class-F mode power amplifier. IEEE Transactions on Microwave Theory and Techniques 59 (5) , pp. 1294-1303. 10.1109/TMTT.2011.2117435

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Abstract

The extended continuous class-F mode RF power amplifier (PA) is presented for the first time. The introduction and experimental validation of this novel PA mode demonstrates a new design space over a wide band of frequencies. This paper will show that high output power and drain efficiency, equivalent to the class-F mode, can be maintained by varying the reactive components of fundamental and second harmonic impedances in accordance with the new formulation of the voltage waveform. Additionally it will be shown that, by varying both phase and magnitude of the fundamental and second harmonic impedances, a yet wider design space can be achieved, where the efficiency is maintained at a level greater than a certain target value. For the validation of this new theory, an experimental investigation was carried out on GaAs pseudomorphic HEMT devices and demonstrates that high output power and drain efficiency between 75%-83% can be achieved over a wide range of fundamental and second harmonic loads.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Uncontrolled Keywords:	Broadband amplifiers; RF circuits; microwave amplifiers; microwave measurements; power amplifiers (PAs)
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
ISSN:	0018-9480
Last Modified:	18 Oct 2022 13:49
URI:	https://orca.cardiff.ac.uk/id/eprint/15567

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