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    A Measure of Well-Spread Points in Noise Wave-Based Source Matrix for Wideband Noise Parameter Measurement: The SKA-Low Example

    84168.pdf (11.35Mb)
    Access Status
    Open access
    Authors
    Sutinjo, Adrian
    Belostotski, L.
    Juswardy, Budi
    Ung, Daniel X.C.
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Sutinjo, A.T. and Belostotski, L. and Juswardy, B. and Ung, D.X.C. 2020. A Measure of Well-Spread Points in Noise Wave-Based Source Matrix for Wideband Noise Parameter Measurement: The SKA-Low Example. IEEE Transactions on Microwave Theory and Techniques. 68 (5): pp. 1783-1793.
    Source Title
    IEEE Transactions on Microwave Theory and Techniques
    DOI
    10.1109/TMTT.2020.2977287
    ISSN
    0018-9480
    Faculty
    Faculty of Science and Engineering
    School
    School of Electrical Engineering, Computing and Mathematical Sciences (EECMS)
    Remarks

    © 2020 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/20.500.11937/84207
    Collection
    • Curtin Research Publications
    Abstract

    The existence of a figure of merit for measuring the degree of well-spread source points in noise parameter extraction has long been conjectured. This article proposes a measure based on noise waves that is physically motivated and is directly connected to linear algebra through the matrix condition number and/or determinant. The key to this figure of merit is the selection of the noise temperature equation and the removal of singularity due to the 1/(1-|\Gamma _{s}|^{2}) factor. The result is a well-scaled source matrix with entries bounded within a unit circle. We demonstrate the effectiveness of this measure by extracting the noise parameters of an amplifier in the low-frequency Square Kilometre Array (SKA-Low) band of 50-350 MHz using seven tuner positions. The noise parameters in the 50-100-MHz band are successfully measured despite being below the 100-MHz tuner rating. This outcome is very well predicted by the condition number and the determinant of the source matrix in question.

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