Symmetric Reflector Ultrasonic Transducer Modeling and Characterization: Role of the Matching Layer on Electroacoustic Performance

Symmetric reflector ultrasonic transducers (SRUTs) are a new type of ultrasonic transducer that take advantage of the ultrasonic wave emitted on the rear face of the active element. In this work, the electroacoustic modeling and characterization of such a structure is reported. Using the well-known...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2021-12, Vol.68 (12), p.3608-3615
Main Authors: Feuillard, Guy, Hue, L. P. Tran Huu, Saadaoui, Naoufal, Nguyen, Van Thien, Lethiecq, Marc, Saillant, Jean Francois
Format: Article
Language:English
Subjects:
Acoustic impedance
Acoustics
Ceramics
Computer Simulation
Equipment Design
Impedance
Impedance matching
Matching layers (electronics)
Mechanics
Modelling
Physics
Piezoelectric ceramics
Sensitivity
Structural analysis
Time-frequency analysis
Transducers
Ultrasonic transducers
Ultrasonics
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Summary:Symmetric reflector ultrasonic transducers (SRUTs) are a new type of ultrasonic transducer that take advantage of the ultrasonic wave emitted on the rear face of the active element. In this work, the electroacoustic modeling and characterization of such a structure is reported. Using the well-known Krimholtz, Leedom, et Matthaei (KLM) model, the electroacoustic response of a SRUT based on a piezoelectric ceramic with one matching layer is calculated. Simulations show that the optimal acoustic impedance of the matching layer should be lower than for conventional transducers, leading to a relative bandwidth of approximately 50%. The characterization of such a transducer based on a piezoceramic plate has been carried out. Bandwidth and sensitivity are reported. They are found to be close to the simulation results and demonstrate that these new types of transducers need to be designed according to new rules compared to conventional ones.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2021.3101124