Microstrip transmission line model-fitting approach for characterization of textile materials as dielectrics and conductors for wearable electronics

Duc Le, Ye Kuang, Leena Ukkonen, Toni Björninen

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    Characterization of unconventional materials is essential in the field of microwave engineering. In this study, we present a method for the microwave characterization of conductive and nonconductive textile materials. Our approach is based on fitting the material parameters of a numerical microstrip transmission line model so that the simulated signal transmission properties match with the data we measure from implemented test lines. Unlike many conventional test structures, such as cavity resonators and waveguides, microstrip lines can be readily manufactured in textile technology with rather relaxed tolerances in the fabrication process. In addition, our method provides estimates for all three key material parameters: frequency-dependent relative permittivity and loss tangent of the nonconductive line substrate and the bulk conductivity of the strip conductor. For validation, we have characterized conventional microwave laminates and compared the data with the datasheets and literature and used our parameter estimates for the textile materials to optimize fully textile-based low-pass filters. Overall, the results confirm the applicability of our method for microwave engineering with textile materials.

    Original languageEnglish
    Article number2582
    Number of pages10
    JournalInternational Journal of Numerical Modelling: Electronic Networks, Devices and Fields
    Volume32
    Issue number6
    DOIs
    Publication statusPublished - Nov 2019
    Publication typeA1 Journal article-refereed

    Keywords

    • PERMITTIVITY
    • ANTENNAS

    Publication forum classification

    • Publication forum level 1

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