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    Candidate Wire Spiral Antennas for the SKA Radio Telescope

    190845_190845. AFD pdf.pdf (635.4Kb)
    Access Status
    Open access
    Authors
    Jiwani, Aziz
    Padhi, Shantanu
    Waterson, Mark
    Hall, Peter
    Bij de Vaate, Jan Geralt
    Date
    2012
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Jiwani, Aziz and Padhi, Shantanu and Waterson, Mark and Hall, Peter J. and Bij de Vaate, Jan Geralt. 2012. Candidate Wire Spiral Antennas for the SKA Radio Telescope, in International Conference on Electromagnetics in Advanced Applications (ICEAA), Sep 2-7 2012, pp. 510-513. Cape Town, South Africa: IEEE.
    Source Title
    2012 International Conference on Electromagnetics in Advanced Applications (ICEAA)
    Source Conference
    International Conference on Electromagnetics in Advanced Applications
    DOI
    10.1109/ICEAA.2012.6328680
    ISBN
    978-1-4673-0335-4
    Remarks

    © 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

    URI
    http://hdl.handle.net/20.500.11937/4982
    Collection
    • Curtin Research Publications
    Abstract

    The SKA is a next generation radio telescope employing phased aperture arrays at its lowest operating band (SKA-low) of 70 - 450 MHz. SKA-low is a dual-polarized array consisting of antenna elements with stable impedance and low cross-polarization. We select the well-known broadband conical spiral antenna and its dual-polarized derivative to be evaluated as candidate elements for SKA-low. Previously, we evaluated the sheet version of the conical spiral and found that it maintained well its broadband characteristics. Looking towards ease of manufacturing, we now evaluate wire versions of the designs. We find that the single-polarized wire version has stable impedance and low cross-polarization from 150 - 450 MHz. However, at low frequencies the cross polarization increases. The dual-polarized version maintains its characteristics over a small band but with higher (> -20 dB) cross polarizations. Measured results confirm the simulated antenna behavior.

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