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    Behavioral Modeling of Outphasing Amplification Systems


    Finnerty, Keith and Dooley, John and Wesson, Robin and van der Heijden, Mark P. and Acar, Mustafa and Farrell, Ronan (2016) Behavioral Modeling of Outphasing Amplification Systems. IEEE Transactions on Microwave Theory and Techniques, 64 (12). pp. 4165-4173. ISSN 0018-9480

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    Abstract

    This paper presents a comparison of existing and novel behavioral models targeted at the outphasing power amplifier (PA) architecture. A comprehensive comparison of ten modeling strategies is presented in the results. Novel techniques for outphasing PAs, such as vector switched and dual path time series, are also presented for the first time. Investigation of such techniques was driven by the analysis of outphasing operation at minimum output powers, demonstrating the generation of frequency-dependent amplitude and phase deviations, which can be difficult to characterize. The increased robustness was achieved at the cost of additional complexity; for practical implementation, time series coefficient reduction techniques were also evaluated. The results of all modeling approaches are experimentally validated for the wideband operation of an NXP 19-W GaN digital outphasing amplifier module. Considering computational complexity and accuracy for system-level modeling across all presented options, a subset of existing and new models is identified as best suited for modeling outphasing PAs.

    Item Type: Article
    Keywords: Behavioral model; outphasing; radio frequency (RF) power amplifier (PA); Volterra;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 10296
    Identification Number: https://doi.org/10.1109/TMTT.2016.2606618
    Depositing User: Dr. Ronan Farrell
    Date Deposited: 06 Dec 2018 18:12
    Journal or Publication Title: IEEE Transactions on Microwave Theory and Techniques
    Publisher: IEEE
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI)
    URI:

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