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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| Published in | Japanese Journal of Applied Physics Vol. 36; no. 5S; p. 3016 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
01.05.1997
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| Online Access | Get full text |
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| Abstract | 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. |
|---|---|
| AbstractList | 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. |
| Author | Kiyoshi Nakamura, Kiyoshi Nakamura Takashi Mizuno, Takashi Mizuno Ken Yamada, Ken Yamada |
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| Cites_doi | 10.1143/JJAP.35.3184 10.1049/el:19961536 10.1016/0025-5408(78)90161-7 10.1016/0025-5408(81)90267-1 10.1364/JOSAA.4.000651 10.1063/1.102107 10.1143/JJAP.34.2610 10.1109/58.67833 10.1016/0025-5408(78)90185-X |
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