Circularly Polarized Dielectric-Loaded Antennas: Current Technology and Future Challenges

Authors

  • Mehdi Mirsaneh,

    1. Department of Engineering Materials, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD (UK)
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  • Oliver P. Leisten,

    1. Sarantel Group Plc, Unit 2 Wendel Point, Ryle Drive, Park Farm South, Wellingborough NN8 6BA (UK)
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  • Beata Zalinska,

    1. Department of Engineering Materials, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD (UK)
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  • Ian M. Reaney

    Corresponding author
    1. Department of Engineering Materials, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD (UK)
    • Department of Engineering Materials, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD (UK).
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Abstract

In the last few years, dielectric loaded antennas (DLAs) have emerged as a viable solution for high-gain reception at microwave frequencies for handheld devices such as satellite phones, radios, and global positioning systems. This article compares the performance, cost, and volumetric efficiencies of the two dominant designs, namely the dielectrically loaded quadrifilar-helix and microstrip patch antennas. The current and future material requirements for DLAs are discussed and an example is given of a recently developed castable glass ceramic based on BiNbO4, which is suitable in terms of properties and glass formability for the single-step fabrication of net-shape antenna cores.

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