Abstract
Envelope tracking power amplifiers (ETPAs) with either analog or digital modulators are described and compared, with emphasis on 5G NR applications. The analog modulator reproduces the envelope amplitude signal with a goal of higher fidelity, while digital envelope modulators produce a discrete stepwise approximation of the envelope signal with a goal of higher efficiency. Analog series-parallel hybrids vs digital power-DACs, tap-changers, and multi-switchers, paired with RF power amplifier such as Class J, E, or F will be reviewed. Linearization schemes for the analog and digital techniques will be shown, with memory effect mitigation and adaptive digital predistortion, including multidimensional linearization for reduced bandwidth envelope tracking.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
