Phased-Array antenna beam squinting related to frequency dependency of delay circuits

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    Abstract

    Abstract-Practical time delay circuits do not have a perfectly linear phase-frequency characteristic. When these delay circuits are applied in a phased-array system, this frequency dependency shows up as a frequency dependent beam direction (“beam squinting‿). This paper quantifies beam squinting for a linear one-dimensional phased array with equally spaced antenna elements. The analysis is based on a (frequency-dependent) linear approximation of the phase transfer function of the delay circuit. The resulting relation turns out to be invariant for cascaded cells. Also a method is presented to design time-delay circuits to meet a maximum phased-array beam squinting requirement.
    Original languageEnglish
    Title of host publicationProceedings of the 41st European Microwave Conference, EuMA 2011
    Place of PublicationUSA
    PublisherIEEE
    Pages1304-1307
    Number of pages4
    ISBN (Print)978-1-61284-235-6
    DOIs
    Publication statusPublished - 10 Oct 2011
    Event41st European Microwave Conference, EuMC 2011 - Manchester, United Kingdom
    Duration: 10 Oct 201113 Oct 2011
    Conference number: 41

    Conference

    Conference41st European Microwave Conference, EuMC 2011
    Abbreviated titleEuMC
    CountryUnited Kingdom
    CityManchester
    Period10/10/1113/10/11

    Keywords

    • METIS-285096
    • Beam pointing
    • Beam squint
    • Beam-forming
    • Phased array
    • True time delay
    • Analog delay
    • EWI-21440
    • Phase-shifter
    • IR-79644

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