Design and fabrication of annular arrays for high-frequency ultrasound

Jeremy A. Brown, Christine E. M. Démoré, Geoffrey R. Lockwood

    Research output: Contribution to journalArticle

    73 Citations (Scopus)

    Abstract

    The design, fabrication, and performance of miniature high-frequency annular arrays are described. A 50-MHz, 2-mm-diameter, 7-element, equal-area annular array was fabricated and tested. The array elements were defined using photolithography and the electrical contacts were made using ultrasonic wire bonding. The resulting transducer produced pulses with a -6 dB bandwidth of 52% and an insertion loss of -16 dB. A radiation pattern was collected by scanning the transducer array above the tip of a glass fiber. A -6 dB two-way beam width of 75 microns was found at f/2. The radiation pattern decreased smoothly to less than -60 dB at a distance of 550 microns.
    Original languageEnglish
    Pages (from-to)1010-1017
    Number of pages8
    JournalIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
    Volume51
    Issue number8
    DOIs
    Publication statusPublished - 1 Aug 2004

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