title: Wireless power delivery for retinal prostheses.
abstract: Delivering power to an implanted device located deep inside the body is not trivial. This problem is made more challenging if the implanted device is in constant motion. This paper describes two methods of transferring power wirelessly by means of magnetic induction coupling. In the first method, a pair of transmit and receive coils is used for power transfer over a large distance (compared to their diameter). In the second method, an intermediate pair of coils is inserted in between transmit and receive coils. Comparison between the power transfer efficiency with and without the intermediate coils shows power transfer efficiency to be 11.5 % and 8.8 %, respectively. The latter method is especially suitable for powering implanted devices in the eye due to immunity to movements of the eye and ease of surgery. Using this method, we have demonstrated wireless power delivery into an animal eye.
authors.affiliation: Department of Broadband, Australian Research Council. david.ng@nicta.co
authors.forename: David C
authors.initials: DC
authors.lastname: Ng
authors.forename: Chris E
authors.initials: CE
authors.lastname: Williams
authors.forename: Penny J
authors.initials: PJ
authors.lastname: Allen
authors.forename: Shun
authors.initials: S
authors.lastname: Bai
authors.forename: Clive S
authors.initials: CS
authors.lastname: Boyd
authors.forename: Hamish
authors.initials: H
authors.lastname: Meffin
authors.forename: Mark E
authors.initials: ME
authors.lastname: Halpern
authors.forename: Efstratios
authors.initials: E
authors.lastname: Skafidas
mesh_terms: D003198:Computer Simulation; D011211:Electric Power Supplies; D004582:Electronics, Medical; D057488:Visual Prosthesis; D059015:Wireless Technology / Q000295:instrumentation*