Miniature antenna for RF telemetry through ocular tissue

In this study, we experiment with the feasibility of wireless telemetry using a miniature wireless system fully implanted within the eye. Of significant importance is the ability to transmit signals from miniature packaged systems without undue absorption of signals. Theoretical calculations found the attenuation through the eye to be −4.5 dB in the far field region, indicating that low power transmission systems can be implemented. Through the use of multilayer integrated Low Temperature Co-fired Ceramics (LTCC) packages, telemetry data through the eye was collected and compared to transmission in free space. In animal studies done using porcine eyes, we were able to successfully transmit and receive from the implanted device in the near field and far field regions measuring 2 dB and 6 dB of power reduction respectively.