Design and Implementation of Artificial Retinal Photoreceptors

Abstract

The electromagnetic modeling of human retinal photoreceptors is being introduced as an antenna concept. The most conventional models have not been analysed in the case of electromagnetic spectrum issues specially antenna behaviour. These common commercial models include Argus I, Argus II (the second sight), Alpha-IMS, fractal prosthesis (FracRet AIM), etc. In this paper, the proposed model is based on dielectric resonator antenna (DRA) for retina photoreceptors of human eye (cones and rods) is being analysed in the frequency range (400-750 THz). A CDRA operating at 8.72 GHz has been simulated and fabricated. Single rod photoreceptor cell is represented by a cylindrical DRA which is simulated at 454.6THz using CST software. The results show that the model is basically good for vision spectrum. It is being indicated by proper S1,1 (return loss below -10dB in majority of the band) with invaluable resonances in a wide range of frequencies from 400THz to 750THz (vision spectrum), suitable Z1,1 (input impedance), gain and compact size.