Power and Q of a horizontal dipole over a metamaterial coated conducting surface

Mervi Hirvonen (Corresponding Author), Johan Sten

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)

    Abstract

    The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular ";air-filling."; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.
    Original languageEnglish
    Pages (from-to)684 - 690
    Number of pages7
    JournalIEEE Transactions on Antennas and Propagation
    Volume56
    Issue number3
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Metamaterials
    Antennas
    Radiation
    Coatings
    Wave power
    Antenna grounds
    Surface waves
    Permittivity
    Finite element method
    Air

    Keywords

    • Conducting surface
    • Dipole antenna
    • Q factor
    • Radiated power
    • Zero-index materials

    Cite this

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    abstract = "The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular {"};air-filling.{"}; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.",
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    author = "Mervi Hirvonen and Johan Sten",
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    language = "English",
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    Power and Q of a horizontal dipole over a metamaterial coated conducting surface. / Hirvonen, Mervi (Corresponding Author); Sten, Johan.

    In: IEEE Transactions on Antennas and Propagation, Vol. 56, No. 3, 2008, p. 684 - 690.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Power and Q of a horizontal dipole over a metamaterial coated conducting surface

    AU - Hirvonen, Mervi

    AU - Sten, Johan

    PY - 2008

    Y1 - 2008

    N2 - The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular ";air-filling."; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.

    AB - The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular ";air-filling."; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.

    KW - Conducting surface

    KW - Dipole antenna

    KW - Q factor

    KW - Radiated power

    KW - Zero-index materials

    U2 - 10.1109/TAP.2008.916937

    DO - 10.1109/TAP.2008.916937

    M3 - Article

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    SP - 684

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    JO - IEEE Transactions on Antennas and Propagation

    JF - IEEE Transactions on Antennas and Propagation

    SN - 0018-926X

    IS - 3

    ER -