Load Modulated RF Amplifiers for Wireless Communications

This paper presents an overview of load modulation as an efficiency enhancement technique for radio frequency (RF) power amplifiers (PAs). A generalization of active load modulation is used to analyze different efficiency enhancement architectures such as the Doherty PA and the outphasing amplifier,...

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Bibliographic Details
Published in:	2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) pp. 1 - 6
Main Authors:	de Falco, P. E., Hallberg, William, Barton, Taylor
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-05-2020
Subjects:	Doherty efficiency enhancement load modulation outphasing power amplifiers
Online Access:	Get full text
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Summary:	This paper presents an overview of load modulation as an efficiency enhancement technique for radio frequency (RF) power amplifiers (PAs). A generalization of active load modulation is used to analyze different efficiency enhancement architectures such as the Doherty PA and the outphasing amplifier, providing qualitative insight of the techniques. Solutions to the challenges presented in load modulation PA design such as linearity, RF, baseband bandwidth and back-off efficiency enhancement are discussed through examples from the state-of-the art.
DOI:	10.1109/WMCS49442.2020.9172415