A miniaturized ultrasonic power delivery system

Author

Tzu-Chieh Chou ; Subramanian, R. ; Jiwoong Park ; Mercier, P.P.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California, San Diego, La Jolla, CA, USA

fYear

2014

fDate

22-24 Oct. 2014

Firstpage

440

Lastpage

443

Abstract

A pair of 4.4mm diameter lead zirconium titanate (PZT) discs were employed for ultrasonic power delivery across biological tissue. The overall system, including the biological tissue and matching layers, was analyzed and modeled as a two-port network with an associated scattering matrix. The matrix coefficients were obtained experimentally in order to determine the maximum available gain (MAG) and optimal operating frequency of the system. The results were validated against finite element analysis simulations, and together they suggest that the miniaturized ultrasonic power delivery system has higher power transfer efficiency than a comparably-sized inductively coupled design at coupling distances greater than 9.5-15.5mm depending on the medium.

Keywords

amplification; bioacoustics; biological tissues; finite element analysis; inductive power transmission; lead compounds; physiological models; prosthetic power supplies; two-port networks; ultrasonic applications; ultrasonic scattering; MAG; PZT; PZT disc; biological tissue; coupling distance; finite element analysis simulation; inductively coupled design; lead zirconium titanate disc; maximum available gain; medium dependence; optimal operating frequency; power transfer efficiency; scattering matrix coefficient; size 4.4 mm; two-port network; ultrasonic power delivery system miniaturization; Acoustics; Impedance; Loss measurement; Minerals; Muscles; Receivers; Transducers; implantable devices; path loss; power transfer efficiency; ultrasonic power transfer; wireless power transfer;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Circuits and Systems Conference (BioCAS), 2014 IEEE

Conference_Location

Lausanne

Type

conf

DOI

10.1109/BioCAS.2014.6981757

Filename

6981757