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

fYear

2009

fDate

20-23 Sept. 2009

Firstpage

2762

Lastpage

2765

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;

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.2009.5442015

Filename

5442015