Single-length method used to determine the dielectric constant of polydimethylsiloxane

Nick Farcich, Jaakko Salonen, Peter Asbeck

    Research output: Contribution to journalArticleScientificpeer-review

    51 Citations (Scopus)


    A new transmission-line method has been developed which is used to determine the propagation constant of a novel microwave material. Rather than requiring two or more transmission-line lengths to determine the propagation constant of a material, our method relies on a single fixture of known length and the use of a dielectric material of known properties to set a baseline measurement. By using a single fixture to make the measurements, we avoid introducing additional parasitic elements that would produce errors. We applied this approach to find the dielectric constant of the polymer polydimethylsiloxane over a frequency range of 0.1-40.0 GHz.
    Original languageEnglish
    Pages (from-to)2963-2971
    Number of pages9
    JournalIEEE Transactions on Microwave Theory and Techniques
    Issue number12
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed



    • Broadband de-embedding
    • complex permittivity
    • dielectric constant
    • polydimethysiloxane (PDMS)
    • propagation constant
    • single-length method
    • Sylgard 182

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