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A study of inversion layer transducers

Estanbouli, Y. and Hayward, G. and Barbenel, J.C. (2003) A study of inversion layer transducers. 2003 IEEE Symposium on Ultrasonics, 2 . IEEE, pp. 1322-1325. ISBN 0-7803-7922-5

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Abstract

Much recent interest has been expressed regarding inversion layer piezoelectric transducers. These are multi-layered devices, incorporating a reversal in piezoelectric polarisation in the stack thickness, creating the potential for extended bandwidth and enhanced even harmonic sensitivity in thickness drive structures. The transducer properties are determined in turn by the relative dimensions of the polarised zones, in addition to the mechanical load conditions at the transducer boundaries. This work presents an evaluation of different inversion layer configurations and piezoelectric materials, using the FE code PZFLEX as a virtual prototyping tool. The influence on non-uniform piezoelectric boundaries in lithium niobate transducers is addressed. The potential for multiple piezoelectric zones is also investigated, through modelling of three and more inversion layers through the transducer thickness. The influence of backing and matching on the transducer bandwidth and sensitivity is also considered. Experimental data is provided for lithium niobate plates and piezoelectric composite transducers, with the latter geared towards the enhanced detection of second harmonic backscatter in contrast agent imaging.

Item type: Book
ID code: 8343
Keywords: inversion layers, multilayers, piezoelectric transducers, ultrasonic transducers, Bioengineering
Subjects: Technology > Engineering (General). Civil engineering (General) > Bioengineering
Department: Unknown Department
Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 01 Sep 2009 14:07
    Last modified: 12 Mar 2012 10:49
    URI: http://strathprints.strath.ac.uk/id/eprint/8343

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