Abstract

An energy harvester for a smart contact lens that monitors the glucose level of a user is developed and demonstrated. The energy harvester captures a smartphone’s 2G cellular emission, and rectifies it into DC power to operate on-lens microelectronics for glucose detection and wireless data transmission. The energy harvester can reach a maximum Ra- dio Frequency (RF) to Direct Current (DC) power conversion efficiency of 47%. An electrically realistic human eye model is designed and fabricated using 3D printing technologies to assist in various measurements of the proposed energy harvester. For accessibility and ease of measurements, the proof-of-concept rectifier for the harvester is designed on a 10mm by 30mm by 0.8mm 2-layer FR4 Printed Circuit Board (PCB). The end design demonstrates that an energy harvester on the smart contact lens is able to produce 1mW of DC power at 2.1V via cellular emission from a smartphone placed 18cm away.

Instructions:

> HFSS simulation files are under the .aedt file extension. 3D models are scrren captured directly from the HFSS model window. The results would require resimulation, because the dataset is not uploaded along with the model files.

> Pictures taken from the camera are edited in powerpoint. Thus, they are in .pptx format.

>Some measurement data are hand recorded in excel, and then graphed using excel tables.

>.dds and .oa are displayed data and schematics respectively. One can create a new ADS workspace, and then replace the automatically generated files with the files provided here.

>by requirement, sources for figures borrowed from citations are in .pdf format.