Novel Electrically Small Spherical Electric Dipole Antenna

Oleksiy S. Kim

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    Abstract

    This paper introduces a novel electrically small spherical meander antenna. Horizontal sections of the meander are composed of wire loops, radii of which are chosen so that the whole structure is conformal to a sphere of radius a. To form the meander the loops are connected by wires at a meridian plane. The antenna operates as an electric dipole, i.e. it radiates the TM10 spherical mode. The antenna is self-resonant and can be matched to a wide range of input feed lines without an external matching network. In this paper, a spherical meander antenna of the size ka = 0.27 and the input impedance of 72 ohms is numerically investigated and its performance is compared to that of the multiarm spherical helix antenna of the same size. Both antennas yield equal quality factors, which are about 1.5 times the Chu lower bound, but quite different cross-polarization characteristics.
    Original languageEnglish
    Title of host publicationiWAT
    Number of pages4
    Place of PublicationLisbon, Portugal
    PublisherIEEE Computer Society Press
    Publication date2010
    ISBN (Print)978-1-4244-4884-5
    DOIs
    Publication statusPublished - 2010
    EventInternational Workshop on Antenna Technology : Small Antennas, Innovative Structures and Materials - Lisbon, Portugal
    Duration: 1 Jan 2010 → …

    Conference

    ConferenceInternational Workshop on Antenna Technology : Small Antennas, Innovative Structures and Materials
    CityLisbon, Portugal
    Period01/01/2010 → …

    Keywords

    • Quality factor
    • Electrically small antennas
    • Electric dipole

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