NDLI: Limited diffraction beam transducer of conical type with apodized vibration area

Content Provider	IEEE Xplore Digital Library
Author	Yamada, K. Koike, T. Mizuno, T. Nakamura, K.
Copyright Year	1996
Description	Author affiliation: Dept. of Electr. Commun., Tohoku Univ., Sendai, Japan (Yamada, K.)
Abstract	A conical transducer with an apodized vibration area is designed and fabricated using a piezocomposite material of 1-3 connectivity for creating limited-diffraction beams. The large electromechanical coupling coefficient k of the piezocomposite material lends itself to increase 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 the fabricated transducer 25 mm in diameter operating at 3.6 MHz. It is also demonstrated through a preliminary experiments of B-mode imaging that the high resolution capability maintains over a large depth.
Starting Page	875
Ending Page	879
File Size	293825
Page Count	5
File Format	PDF
ISBN	0780336151
ISSN	10510117
DOI	10.1109/ULTSYM.1996.584132
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Diffraction Acoustic transducers Acoustic beams Ultrasonic transducers Piezoelectric transducers Composite materials High-resolution imaging Image resolution Electrodes Biological materials
Content Type	Text
Resource Type	Article

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Limited diffraction beam transducer of conical type with apodized vibration area