Minimization of thickness of ultrasonic transducer by using piezoelectric backing layer

To realize an insertion transducer with broadband characteristic, a transducer with a piezoelectric backing layer is proposed. The characteristic of the transducer was analyzed by using an equivalent circuit for a different electrical impedance connected to the piezoelectric backing layer. In the tr...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2018-07, Vol.57 (7S1), p.7
Main Authors: Yeom, Jiyoung, Kim, Jungsoon, Ha, Kanglyeol, Kim, Moojoon
Format: Article
Language:English
Subjects:
Broadband
Electrical impedance
Equivalent circuits
Piezoelectricity
Thickness
Ultrasonic transducers
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Summary:To realize an insertion transducer with broadband characteristic, a transducer with a piezoelectric backing layer is proposed. The characteristic of the transducer was analyzed by using an equivalent circuit for a different electrical impedance connected to the piezoelectric backing layer. In the transducer designed to achieve optimization, the thickness of the transducer is less than 2.4 times that of the driving piezoelectric layer, and the frequency bandwidth is more than 110%. It is confirmed that the bandwidth of the fabricated transducer can be controlled by adjusting the electrical impedance in the piezoelectric backing layer.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.57.07LD05