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https://doi.org/10.1143/jjap.36.3016
Copy DOIJournal: Japanese Journal of Applied Physics | Publication Date: May 1, 1997 |
Citations: 3 |
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.
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