Characteristics of a Conical Piezocomposite Transducer with an Apodized Vibration Area

A conical transducer with an apodized vibration area has been designed and fabricated using a piezocomposite material with 1–3 connectivity for creating limited-diffraction beams. The large electromechanical coupling coefficient k of the piezocomposite material increases the transducer sensitivity....

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 36; no. 5S; p. 3016
Main Authors Takashi Mizuno, Takashi Mizuno, Ken Yamada, Ken Yamada, Kiyoshi Nakamura, Kiyoshi Nakamura
Format Journal Article
LanguageEnglish
Published 01.05.1997
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Summary:A conical transducer with an apodized vibration area has been designed and fabricated using a piezocomposite material with 1–3 connectivity for creating limited-diffraction beams. The large electromechanical coupling coefficient k of the piezocomposite material increases the transducer sensitivity. It is shown that an almost uniform -6 dB beamwidth of 6–9 wavelengths is obtained in the axial range of z = 20 mm to 170 mm using a fabricated transducer 25 mm in diameter operating at 3.6 MHz. It is also demonstrated through preliminary experiments with B-mode imaging that high resolution is maintained over a large depth.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.36.3016