Poluri, N. and De Souza, M.M. orcid.org/0000-0002-7804-7154 (2019) High-efficiency modes contiguous with class B/J and continuous class F⁻¹ amplifiers. IEEE Microwave and Wireless Components Letters, 29 (2). pp. 137-139. ISSN 1531-1309
Abstract
We propose a new formulation for high-efficiency modes of power amplifiers in which both the in-phase and out-of-phase components of the second harmonic of the current are varied, in addition to the second-harmonic component of the voltage. A reduction of the in-phase component of the second harmonic of current allows reduction of the phase difference between the voltage and current waveforms, thereby increasing the power factor and efficiency. Our proposed waveforms offer a continuous design space between the class B/J continuum and continuous F⁻¹ achieving an efficiency of up to 91% in theory but over a wider design space than F⁻¹. These waveforms require a short at third and higher harmonic impedances, which are easier to achieve at higher frequency. The fabricated amplifier using a GaN HEMT CGH40010F achieves 79.7% drain efficiency and 42.2-dBm saturated output power at 2.6 GHz, which gives a frequency weighted efficiency of 92.4%⁴√ GHz with this device.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Funding Information: | Funder Grant number INNOVATE UK (TSB) 600721 PARSIMO-270687-2 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 22 Jan 2019 10:08 |
Last Modified: | 16 Nov 2021 12:00 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers |
Refereed: | Yes |
Identification Number: | 10.1109/LMWC.2018.2886655 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:141433 |