A high-frequency beamformer design based on variable PMN-PT SAW delays

Author

Adamson, Rob ; Torbatian, Zahra ; Bance, Manohar ; Brown, Jeremy

Author_Institution

Sch. of Biomed. Eng., Dalhousie Univ., Halifax, NS, Canada

fYear

2009

fDate

20-23 Sept. 2009

Firstpage

1318

Lastpage

1321

Abstract

A high-frequency ultrasound beamformer based on 70Pb(Mg_1/3Nb_2/3)O₃-0.30PbTiO₃ (PMN-30%PT) single crystal has been designed. The beamformer delays are created using surface acoustic wave (SAW) delay lines, which can be dynamically tuned using the elongation and compression of the bulk PMN-PT substrate between the send and receive SAW electrodes. The change in SAW delay due to the elongation has been measured experimentally and good agreement with the theoretical predictions was found.

Keywords

array signal processing; lead compounds; surface acoustic wave delay lines; ultrasonic delay lines; ultrasonic transducer arrays; Pb(Mg_0.33Nb_0.67)O₃-PbTiO₃; SAW electrodes; compression; elongation; high frequency beamformer design; surface acoustic wave delay line; ultrasound beamformer; variable PMN-PT SAW delay; Acoustic waves; Array signal processing; Delay effects; Delay lines; Electrodes; Propagation delay; Surface acoustic waves; Surface waves; Ultrasonic imaging; Ultrasonic transducers; Beamformer; High-frequency; Single Crystal ( PMN-PT); Surface Acousitc Wave (SAW); Transducer Array;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2009 IEEE International

Conference_Location

Rome

ISSN

1948-5719

Print_ISBN

978-1-4244-4389-5

Electronic_ISBN

1948-5719

Type

conf

DOI

10.1109/ULTSYM.2009.5441801

Filename

5441801