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Acoustic polarization for optimized implantable power transimittion
Journal
IEEE International Conference on Micro Electro Mechanical Systems
Pages
879-882
Date Issued
2007
Author(s)
Abstract
We present a fully-packaged acoustic power receiver which is implantable in the subcutaneous tissue to receive the acoustic energy generated from a compressive wave emitter on the skin. The implanted receiver is a piezoelectric acoustic transducer and is packaged by biocompatible cohesive gels. This specific package is soft enough to absorb the incident wave from the subcutaneous tissue. The receiver employs direct charging to convert the acoustic energy into the extractable electrical energy through piezoelectricity when exposed to the acoustic field. The effects of the scattering package shape and the stiffness ratio between the package and subcutaneous tissue are considered to design the receivers. The energy efficiency of the fabricated receiver is measured inside real streaky pork, which is used to simulate human subcutaneous tissue. The result indicates that the spherical package is more suitable than the cubic one when they are buried in the fatty layer. The maximum efficiency of the power transmission is found to be -40dB. © 2007 IEEE.
SDGs
Other Subjects
Acoustic fields; Acoustics; Colloids; Composite micromechanics; Conservation; Crystallography; Efficiency; Gelation; Mechanical engineering; Mechanics; Mechatronics; MEMS; Microelectromechanical devices; Optical design; Photoacoustic effect; Piezoelectricity; Reactive ion etching; Acoustic energy; Acoustic powers; Electrical energy; Incident waves; International conferences; Maximum efficiency; Micro-electro mechanical systems; Stiffness ratio; Subcutaneous tissues; Energy efficiency
Type
conference paper