Multiple matching scheme for broadband 0.72Pb (Mg1/3 Nb2/3) O3-0.28 PbTiO3single crystal phased-array transducer

S. T. Lau, H. Li, K. S. Wong, Q. F. Zhou, D. Zhou, Y. C. Li, H. S. Luo, K. K. Shung, Jiyan Dai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)

Abstract

Lead magnesium niobate-lead titanate single crystal 0.72Pb (Mg1/3 Nb2/3) O3-0.28 PbTiO3(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.
Original languageEnglish
Article number094908
JournalJournal of Applied Physics
Volume105
Issue number9
DOIs
Publication statusPublished - 22 Jun 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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