Title :
Toward more efficient matching layers for piezoelectric transducers
Author :
Levassort, Franck ; Maréchal, Pierre ; Boy, Philippe ; Acher, Olivier
Author_Institution :
UMR Imagerie & Cerveau, Francois Rabelais Univ., Tours, France
Abstract :
Ultimate performance of electromagnetic absorbers were adapted and extrapolated to the field of acoustics. The case of broadband matching structures for ultrasonic transducers is studied in this paper. Simple expressions of appropriate figures of merit were defined to evaluate the efficiency of multilayer matching structures between the piezoelectric material (PZT) and the propagation medium (water). The surface mass of quarter-wavelength matching layers was a key parameter. Results showed that future improvements can be obtained by retaining bandwidth (here at -3dB) as a benchmark.
Keywords :
acoustic materials; biomedical ultrasonics; lead compounds; piezoceramics; piezoelectric transducers; ultrasonic imaging; ultrasonic transducers; PZT piezoelectric material; broadband matching structures; efficient matching layers; electromagnetic absorbers; multilayer matching structures; piezoelectric transducers; quarter wavelength matching layers; water propagation medium; Acoustic propagation; Acoustic transducers; Bandwidth; Electromagnetic fields; Impedance; Nonhomogeneous media; Piezoelectric materials; Piezoelectric transducers; Ultrasonic transducers; Upper bound; Matching layers; PZT; transducers;
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.2009.5442015
