DocumentCode :
768058
Title :
Design and fabrication of broadband graded ultrasonic transducers with rectangular kerfs
Author :
Guo, Hongkai ; Cannata, Jonathan M. ; Zhou, Qifa ; Shung, K. Kirk
Author_Institution :
Dept. of Biomed. Eng., Univ. of Southern California, Los Angeles, CA, USA
Volume :
52
Issue :
11
fYear :
2005
Firstpage :
2096
Lastpage :
2102
Abstract :
Broadband ultrasound imaging is capable of achieving superior resolution in clinical applications. An effective and easy way of manufacturing broadband transducers is desired for these applications. In this work, a graded material in which the piezoelectric plate is mechanically graded with rectangular grooves is introduced. Finite element analysis (FEA) demonstrated that the graded piezoelectric material could achieve a broadband, time-domain response resulting from multiple resonant modes. Experimental tests were carried out to validate these theoretical results. Based upon the FEA designs, several single-element transducers were fabricated using either a nondiced ceramic or a diced, graded ceramics. A superior bandwidth of 92% was achieved by the graded transducer when compared to a bandwidth of 56% produced by the nondiced ceramic transducer at the expense of a reduced sensitivity.
Keywords :
design engineering; finite element analysis; piezoelectric devices; rectangular waveguides; ultrasonic transducers; FEA; broadband graded ultrasonic transducers; broadband ultrasound imaging; diced ceramics; finite element analysis; nondiced ceramic; piezoelectric plate; rectangular grooves; rectangular kerfs; Bandwidth; Ceramics; Fabrication; Finite element methods; Image resolution; Manufacturing; Piezoelectric materials; Piezoelectric transducers; Ultrasonic imaging; Ultrasonic transducers; Ceramics; Computer Simulation; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Finite Element Analysis; Models, Theoretical; Reproducibility of Results; Sensitivity and Specificity; Transducers; Ultrasonography;
fLanguage :
English
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-3010
Type :
jour
DOI :
10.1109/TUFFC.2005.1561680
Filename :
1561680
Link To Document :
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