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    Revisiting Hybrid Interferometry With Low-Frequency Radio Astronomy Arrays

    255688.pdf (1.749Mb)
    Access Status
    Open access
    Authors
    Sutinjo, Adrian
    Ung, D.
    Colegate, T.
    Wayth, R.
    Hall, Peter
    Acedo, E.
    Date
    2017
    Collection
    • Curtin Research Publications
    Type
    Journal Article
    Metadata
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    Abstract

    Radio interferometry most commonly involves antennas or antenna arrays of identical design. The identical antenna assumption leads to a convenient and useful mathematical simplification resulting in a scalar problem. An interesting variant to this is a "hybrid" interferometer involving two designs. We encounter this in the characterization of low-frequency antenna/array prototypes using a homogenous low-frequency array telescope such as the Murchison Widefield Array (MWA). In this work, we present an interferometry equation that applies to hybrid antennas. The resulting equation involves vector inner products rather than scalar multiplications. We discuss physical interpretation and useful applications of this concept in the areas of sensitivity measurement and calibration of an antenna/array under test using a compact calibrator source.

    Citation
    Sutinjo, A. and Ung, D. and Colegate, T. and Wayth, R. and Hall, P. and Acedo, E. 2017. Revisiting Hybrid Interferometry With Low-Frequency Radio Astronomy Arrays. IEEE Transactions on Antennas and Propagation. 65 (8): pp. 3967-3975.
    Source Title
    Transactions on Antennas and Propagation
    URI
    http://hdl.handle.net/20.500.11937/57064
    DOI
    10.1109/TAP.2017.2710206
    Department
    Department of Electrical and Computer Engineering
    Remarks

    © 2017 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.

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