A design methodology for efficiency improvement of CMOS class-E power amplifiers

Wen An Tsou, Che Sheng Chen, Chun Kai Wang, Kuei-Ann Wen

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    This paper presents an analysis on efficiency improvement of class-E power amplifiers (PAs) with Microelectrome chanical systems (MEMS) inductors. The efficiency can be improved and has been demonstrated by using MEMS inductors. The proposed MEMS technology is validated by a prototype MEMS inductor. Also, the simulation result of MEMS inductors by HFSS have good match with the measured result. The stacked-metal layer inductors implemented in MEMS process are developed for increasing the quality factor. The simulation result of a CMOS class-E PA with MEMS inductors shows that the increased quality factor of inductors by 2 can improve the drain efficiency by 6%. Therefore, we present a design methodology that can improve the efficiency of PAs by optimizing the quality factor of fully integrated inductors.

    Original languageEnglish
    Title of host publication2009 International Conference on Microwave Technology and Computational Electromagnetics, ICMTCE 2009
    Pages253-256
    Number of pages4
    Edition557 CP
    DOIs
    StatePublished - 2009
    Event2009 International Conference on Microwave Technology and Computational Electromagnetics, ICMTCE 2009 - Beijing, China
    Duration: 3 Nov 20096 Nov 2009

    Publication series

    NameIET Conference Publications
    Number557 CP
    Volume2009

    Conference

    Conference2009 International Conference on Microwave Technology and Computational Electromagnetics, ICMTCE 2009
    Country/TerritoryChina
    CityBeijing
    Period3/11/096/11/09

    Keywords

    • MEMS inductors
    • Power amplifiers
    • Power efficiency
    • Quality factor

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