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Analytical and Numerical Optimization of an Implantable Volume Conduction Antenna

by Wessel, Brian Langan

Abstract (Summary)
As implantable devices become increasingly sophisticated, a means of communication is required to transmit data to and from the device. A volume conduction antenna model has been developed that meets the size and power constraints of an in vivo environment. This thesis aims to optimize the shape, curvature, and orientation of these antennas. Analytical and numerical analysis shows that the performance is independent of the conic section used to simulate an antenna. Both analyses were also in agreement that highest curvatures achieve maximum surface potentials, and that the angle is dependent on the distance of the antenna from the surface of the head. Analytical analysis suggests that pointing the antenna elements directly at the surface may not be the optimum angle, but rather at a smaller angle. Too few data points were taken to make the same determination from the numerical case but the optimum angle does deviate from the hypothesized angle in the same way, suggesting a similar result. The numerical analysis was important as it facilitated the simulation of the epoxy between the antenna elements. Incorporating epoxy into the simulation showed 30-35% increases in surface potential. A reflective sheet was then added showing further increases in surface potential.
Bibliographical Information:

Advisor:Mingui Sun, Ph.D.; Robert J. Sclabassi, M.D., Ph.D.; Ching-Chung Li; John Robert Boston, Ph.D.

School:University of Pittsburgh

School Location:USA - Pennsylvania

Source Type:Master's Thesis

Keywords:electrical engineering

ISBN:

Date of Publication:06/09/2004

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