1-3 piezocomposite design optimised for high frequency kerfless transducer arrays

Piezocomposites that can operate at frequencies above 30 MHz without spurious modes are required in order to develop sufficiently sensitive high frequency arrays for high resolution imaging. However, scaling down of conventional piezocomposite fabrication techniques becomes increasingly difficult as...

Full description

Saved in:
Bibliographic Details
Main Authors: Demore, C E M, Cochran, S, Garcia-Gancedo, L, Dauchy, F, Button, T W, Bamber, J C
Format: Conference Proceeding
Language:English
Subjects:
1-3 composite
Acoustic transducers
Biomedical imaging
Biomedical transducers
Ceramics
Design optimization
Electrodes
Fabrication
Frequency
high-frequency array
micromoulding
Optical arrays
Shape
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Piezocomposites that can operate at frequencies above 30 MHz without spurious modes are required in order to develop sufficiently sensitive high frequency arrays for high resolution imaging. However, scaling down of conventional piezocomposite fabrication techniques becomes increasingly difficult as dimensions decrease with increasing frequency. The approach presented here is to use micro-moulded 1-3 piezocomposites and a distribution of piezoelectric segment size and separation. Innovative approaches to composite pattern design, based on a randomized spatial distribution, are presented. Micro-moulding techniques are shown to be suitable for fabricating composites with dimensions required for high frequency composites. Randomized piezocomposite patterns are modeled and are shown to suppress spurious modes.
ISSN:1051-0117
DOI:10.1109/ULTSYM.2009.5442007