Outphasing class-E/ F2 power amplifier using a quadrature hybrid as non-isolating combiner

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Identificadores
URI: http://hdl.handle.net/10902/24254
ISBN: 978-0-7381-4367-5
ISBN: 978-1-6654-0409-9
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Autoría
Cordero Pinillos, Ana; Ruiz Lavín, María de las NievesAutoridad Unican; Vegas Bayer, DavidAutoridad Unican; García García, José ÁngelAutoridad Unican
Fecha
2021
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© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.
Publicado en
IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR): Virtual Conference, San Diego, CA, 2021, 55-58
Editorial
Institute of Electrical and Electronics Engineers, Inc.
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Palabras clave
Class-E
Chireix
Load modulation
Load-pull
Outphasing
Power amplifier
Power efficiency
Resumen/Abstract
This paper presents a GaN HEMT outphasing power amplifier (PA), based on a class-E/ F 2 topology with reduced sensitivity to variable resistive load operation, designed to provide output power control over an extended range with high efficiency. A 90-degree hybrid coupler is used as non-isolating combiner, incorporating an appropriate reactive termination on its fourth port. Besides its many intrinsic advantages, the mutual load modulation trajectories may be rotated by simply adjusting a capacitor value or alternatively the length of an open-circuited transmission line. Once implemented at UHF band, the outphasing PA provides a drain efficiency higher than 70% up to an output power 10 dB below its peak value (42.2 dBm).
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