Title :
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
Abstract :
A high-frequency ultrasound beamformer based on 70Pb(Mg1/3Nb2/3)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(Mg0.33Nb0.67)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;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441801
