Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/3272
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Title: Multiple matching scheme for broadband 0.72Pb(Mg[sub ⅓]Nb[sub ⅔])O₃−0.28PbTiO₃single crystal phased-array transducer
Authors: Lau, ST
Li, H
Wong, KS
Zhou, Q
Zhou, D
Li, YC
Luo, H
Shung, KK
Dai, J 
Issue Date: 1-May-2009
Source: Journal of applied physics, 1 May, 2009, v. 105, no. 9, 094908, p. 1-5
Abstract: Lead magnesium niobate–lead titanate single crystal 0.72Pb(Mg[sub ⅓]Nb[sub ⅔])O₃−0.28PbTiO₃(abbreviated as PMN-PT) was used to fabricate high performance ultrasonic phased-array transducer as it exhibited excellent piezoelectric properties. In this paper, we focus on the design and fabrication of a low-loss and wide-band transducer for medical imaging applications. A KLM model based simulation software PiezoCAD was used for acoustic design of the transducer including the front-face matching and backing. The calculated results show that the −6 dB transducer bandwidth can be improved significantly by using double λ/8 matching layers and hard backing. A 4.0 MHz PMN-PT transducer array (with 16 elements) was fabricated and tested in a pulse-echo arrangement. A −6 dB bandwidth of 110% and two-way insertion loss of −46.5 dB were achieved.
Keywords: Biomedical ultrasonics
Lead compounds
Piezoelectric transducers
Ultrasonic transducer arrays
Publisher: American Institute of Physics
Journal: Journal of applied physics 
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.3065476
Rights: © 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S.T. Lau et al., J. Appl. Phys. 105, 094908 (2009) and may be found at http://jap.aip.org/resource/1/japiau/v105/i9/p094908_s1.
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