title: Antenna and coil design for wireless signal detection and charging of embedded power active contact lens.
abstract: This paper presents a screen printed 2.4 GHz antenna and induction charging coil for an active contact lens with a single large pixel user display and on-board 3.8 V 5 uAh rechargeable battery. The antenna traces are printed using silver conductive paste on a 25 um polyethylene terephthalate (PET) substrate. The incoming signal from the antenna feeds into an IC that amplifies and rectifies the signal. The coil provides wireless energy transfer to inductively charge a thin film battery [1] located on the contact lens. The printed antenna achieved a S11 of -4 dB at 2.4 GHz and a gain of -13 dB.
authors.forename: Benny
authors.initials: B
authors.lastname: Ng
authors.forename: Paul
authors.initials: P
authors.lastname: Heckler
authors.forename: Alex
authors.initials: A
authors.lastname: Do
authors.forename: Phillip
authors.initials: P
authors.lastname: Azar
authors.forename: Errol
authors.initials: E
authors.lastname: Leon
authors.forename: Tina
authors.initials: T
authors.lastname: Smilkstein
mesh_terms: D000465:Algorithms; D011211:Electric Power Supplies; D004735:Energy Transfer; D004867:Equipment Design; D011093:Polyethylene Terephthalates / Q000737:chemistry; D059015:Wireless Technology / Q000295:instrumentation*
chemical_list: D011093:Polyethylene Terephthalates