title: A wireless power transmission system for implantable devices in freely moving rodents.
abstract: Reliable wireless power delivery for implantable devices in animals is highly desired for safe and effective experimental use. Batteries require frequent replacement; wired connections are inconvenient and unsafe, and short-distance inductive coupling requires the attachment of an exterior transmitter to the animal's body. In this article, we propose a solution by which animals with implantable devices can move freely without attachments. Power is transmitted using coils attached to the animal's cage and is received by a receiver coil implanted in the animal. For a three-dimensionally uniform delivery of power, we designed a columnar dual-transmitter coil configuration. A resonator-based inductive link was adopted for efficient long-range power delivery, and we used a novel biocompatible liquid crystal polymer substrate as the implantable receiver device. Using this wireless power delivery system, we obtain an average power transfer efficiency of 15.2% (minimum efficiency of 10% and a standard deviation of 2.6) within a cage of 15×20×15 cm3.
authors.affiliation: Department of Electrical and Computer Engineering, Nanobioelectronics and Systems Lab, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea.
authors.forename: Kyungsik
authors.initials: K
authors.lastname: Eom
authors.forename: Joonsoo
authors.initials: J
authors.lastname: Jeong
authors.forename: Tae Hyung
authors.initials: TH
authors.lastname: Lee
authors.forename: Jinhyung
authors.initials: J
authors.lastname: Kim
authors.forename: Junghoon
authors.initials: J
authors.lastname: Kim
authors.forename: Sung Eun
authors.initials: SE
authors.lastname: Lee
authors.forename: Sung June
authors.initials: SJ
authors.lastname: Kim
mesh_terms: D000818:Animals; D003198:Computer Simulation; D004560:Electricity; D050866:Liquid Crystals / Q000737:chemistry; D051379:Mice; D009068:Movement / Q000502:physiology*; D011108:Polymers / Q000737:chemistry; D019736:Prostheses and Implants; D051381:Rats; D013997:Time Factors; D059015:Wireless Technology / Q000295:instrumentation*
chemical_list: D011108:Polymers