Investigation of element cross talk in arrays, using 1-3 piezocomposite substrates

Christine E. M. Demore, Sandy Cochran, Paul Reynolds

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Arrays can be defined by an electrode pattern on the surface of a 1-3 piezocomposite substrate, but spurious modes arise when the array electrodes are aligned with the rows of pillars. One method that is used to suppress these spurious modes is to pattern array elements at an oblique angle to the rows of pillars In the piezocomposite. In this paper we confirm theoretically that rotating the array Improves performance using the PZFlex finite element analysis package. Compared to the case with aligned electrodes, rotating the array electrodes suppresses spurious modes by disrupting the periodicity of the piezocomposite along the array azimuth and therefore waves that propagate along the array. However, spurious modes can still arise due to the periodicity Imposed on the structure by the pattern of array electrodes. Rotating the electrodes also ensures that all elements In the array have similar performance characteristics.

    Original languageEnglish
    Title of host publication2007 IEEE Ultrasonics Symposium Proceedings
    Place of PublicationNew York
    PublisherIEEE Computer Society
    Pages187-190
    Number of pages4
    ISBN (Electronic)9781424413843
    ISBN (Print)9781424413836
    DOIs
    Publication statusPublished - 2007
    Event2007 IEEE International Ultrasonics Symposium (IUS) - New York, United States
    Duration: 28 Oct 200731 Oct 2007
    http://ewh.ieee.org/conf/ius_2007/

    Conference

    Conference2007 IEEE International Ultrasonics Symposium (IUS)
    Abbreviated title2007 IEEE IUS
    CountryUnited States
    CityNew York
    Period28/10/0731/10/07
    Internet address

    Keywords

    • Finite element modeling
    • Array
    • Plezocomposite
    • Cross talk

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