Title :
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
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;
Conference_Titel :
Biomedical Circuits and Systems Conference (BioCAS), 2014 IEEE
Conference_Location :
Lausanne
DOI :
10.1109/BioCAS.2014.6981757
