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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, Sien Ting|
Wong, K. S.
Li, Y. C.
Shung, K. K.
Ultrasonic transducer arrays
|Publisher:||American Institute of Physics|
|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.|
|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.|
|Appears in Collections:||AP Journal/Magazine Articles|
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