Phaseless Characterization of Broadband Antennas

Ana Arboleya, Jaime Laviada, Juha Ala-Laurinaho, Yuri Alvarez, Fernando Las-Heras, Antti Räisänen

    Research output: Contribution to journalArticleScientificpeer-review

    23 Citations (Scopus)

    Abstract

    A new efficient method for broadband antenna characterization from phaseless acquisitions in the frequency-domain (FD) is presented. The phase-retrieval technique is based on an extrapolation of the off-axis indirect holography. In common with the conventional approach, the power of the interferometric field of the antenna under test (AUT) and a reference antenna, whose field is known in advance, as well as the power of the AUT alone, is measured at the desired frequencies. Nevertheless, the phase retrieval is accomplished independently at each spatial point by filtering in the time-domain (TD) rather than in the k-space. Thus, the dependency of the phase retrieval on the position accuracy is reduced and it can be accomplished simultaneously at all frequencies without resorting to iterative schemes. Moreover, it yields a less dense sampling and a phase-retrieval algorithm not dependent on the geometry of the acquisition. The method is illustrated with a numerical example in the W-band as well as with two near-field (NF) measurement examples in the Ka- and W-bands.

    Original languageEnglish
    Article number7364188
    Pages (from-to)484-495
    Number of pages12
    JournalIEEE Transactions on Antennas and Propagation
    Volume64
    Issue number2
    DOIs
    Publication statusPublished - 1 Feb 2016
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Antenna measurement
    • broadband
    • diagnostics
    • Leith-Upatnieks
    • off-axis holography
    • phaseless
    • REFERENCE-WAVE HOLOGRAPHY
    • NEAR-FIELD MEASUREMENTS
    • RADIATION CHARACTERISTICS
    • TIME-DOMAIN
    • FORMULATION

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