Implantable Wireless Telemetry Boards for In Vivo Transocular Transmission.

Authors :: Chow, Eric Y.
Chin-Lung Yang
Chlebowski, Arthur
Sungwook Moon
Chappell, William J.
Irazoqui, Pedro P.
Source :: IEEE Transactions on Microwave Theory & Techniques. Dec2008 Part 2 of 2, Vol. 56 Issue 12, p3200-3208. 9p. 11 Black and White Photographs, 2 Diagrams, 6 Graphs.
Publication Year :: 2008
Abstract: We report live animal studies that verify and quantify successful transocular transmission of data from a miniature low-power implant. To minimize damage, implantation within layers of the eye requires an ultrasmall device on a scale of just a few millimeters on each side and less than 500 μm in thickness. A high-frequency transmitter integrated circuit (IC) was designed, fabricated, and bonded onto a board containing an antenna, matching network components, and interconnects. The transmitter must achieve sufficient efficiency to draw minimal power from the limited onboard storage array while outputting a sufficiently large signal to overcome tissue-induced attenuation. Two different versions of the system were developed, one using a low-temperature co-fired ceramic material for the substrate and the other using silicon. Animal studies performed using live rabbits followed by empirical measurements verified the feasibility of a wireless telemetry scheme for a low-power miniature ocular implant. [ABSTRACT FROM AUTHOR]