An Efficient, Linear, Broadband Class-J-Mode PA Realised Using RF

Wright, Peter Thomas, Lees, Jonathan, Tasker, Paul J., Benedikt, Johannes and Cripps, Stephen Charles 2009. An Efficient, Linear, Broadband Class-J-Mode PA Realised Using RF. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, MA, USA, 7-12 June 2009. IEEE MTT-S International Microwave Symposium Digest, 2009. MTT '09. Los Alamitos, CA: IEEE, pp. 653-656. 10.1109/MWSYM.2009.5165781

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Abstract

Results from a fully implemented class-J RFPA (RF power amplifier) are presented for the first time, which demonstrate this mode's high efficiency potential across a substantial bandwidth. Using a commercially available 10W GaN (gallium nitride) HEMT device, and the high power waveform measurement and active load-pull capability at Cardiff University, class-J operation has demonstrated drain efficiencies between 60-70% across a 1.35-2.25 GHz (50%) bandwidth whilst delivering 10 Watts of power at the 2dB compression point. Realisation of the design has confirmed that the optimum harmonic load impedances of the class-J amplifier are more practically realisable than conventional class-AB modes, with better compromise between power and efficiency tradeoffs over a substantial RF bandwidth.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Uncontrolled Keywords:	Bandwidth, class-J, high efficiency, power amplifiers
Publisher:	IEEE
ISBN:	9781424428038
ISSN:	0149-645X
Last Modified:	04 Jun 2017 03:27
URI:	http://orca.cf.ac.uk/id/eprint/21546

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