Near-zero permittivity substrates for horizontal antennas: Performance enhancement and limitations

Mervi Hirvonen (Corresponding Author), Sergei A. Tretyakov

    Research output: Contribution to journalArticle

    3 Citations (Scopus)


    In this letter the advantages offered by ε‐near‐zero materials as substrates for horizontal dipole antennas near a ground plane are theoretically studied. From the previous work it is known that substrates with extremely low values of permittivity dramatically enhance radiation from horizontal currents over a ground plane. On the other hand, as reported in this letter, frequency dispersion and the finite size of the substrate limit the achievable enhancement in antenna performance.
    Original languageEnglish
    Pages (from-to)2674-2677
    Number of pages4
    JournalMicrowave and Optical Technology Letters
    Issue number10
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed



    • dipole antenna
    • conducting surface
    • near-zero permittivity
    • dispersion
    • quality factor

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