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Proceedings Paper

Comparison of various models for piezoelectric receivers in wireless acoustic power transfer
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Paper Abstract

Piezoelectric transduction has lately been employed in wireless acoustic power transfer (APT) for powering electronic components that cannot be accessed easily, such as deep-implanted medical devices. Typically, the axial (or thickness) vibration mode of piezoelectric materials is used to generate acoustic waves that propagate through a medium, which are then converted back into electricity and delivered to an electrical load at the receiver end. The piezoelectric receiver can have various aspect ratios (length/diameter) in a given APT application. This work aims to develop and compare various models, such as the classical theory, Rayleigh’s theory, and Bishop’s theory, as well as finite-element model simulations, for different aspect ratios with an emphasis on those with comparable dimensions. Following analytical modeling and numerical simulation efforts, both in air and fluid loaded impedance frequency response functions are compared to report the valid aspect ratio ranges of the respective theories and their limitations, along with comparisons against experiments.

Paper Details

Date Published: 27 March 2019
PDF: 8 pages
Proc. SPIE 10967, Active and Passive Smart Structures and Integrated Systems XIII, 109670S (27 March 2019); doi: 10.1117/12.2515377
Show Author Affiliations
Ahmed Allam, Georgia Institute of Technology (United States)
Karim Sabra, Georgia Institute of Technology (United States)
Alper Erturk, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10967:
Active and Passive Smart Structures and Integrated Systems XIII
Alper Erturk, Editor(s)

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