Ultrasound transducer models for piezoelectric polymer films

A method is presented for determining the piezoelectric constants and the frequency-dependent dielectric properties of the polymers from a five-step algorithm based on analysis of air-loaded broadband impedance measurements. It is shown how to account for the frequency-dependent lossy properties of...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 1989-05, Vol.36 (3), p.313-318
Main Authors: Brown, L.F., Carlson, D.L.
Format: Article
Language:English
Subjects:
Acoustics
Algorithm design and analysis
Circuits
Dielectrics
Exact sciences and technology
Frequency
Fundamental areas of phenomenology (including applications)
Impedance measurement
Physics
Piezoelectric films
Piezoelectric transducers
Polymer films
Transduction
acoustical devices for the generation and reproduction of sound
Ultrasonic imaging
Ultrasonic transducers
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Summary:A method is presented for determining the piezoelectric constants and the frequency-dependent dielectric properties of the polymers from a five-step algorithm based on analysis of air-loaded broadband impedance measurements. It is shown how to account for the frequency-dependent lossy properties of these films in an equivalent impedance circuit model and a modified Mason's model. Comparisons between the models and actual film transducers show excellent broadband simulation of both electrical input impedance and ultrasonic pulse-echo performance.< >
ISSN:0885-3010
1525-8955
DOI:10.1109/58.19169