title: Design of two-dimensional coils for wireless power transmission to in vivo robotic capsule.
abstract: This paper presents a design of two dimensional receiving coils to provide hundreds of milli-watt power via inductive link to in vivo robotic capsules, whose orientation are practically undetermined. The wireless power transmission system consists of a transmitter powered by class E power amplifier, and receiver with 2-dimensional antenna, rectifier, and voltage regulator. Two types of 2-dimensional antennas are designed and evaluated by theoretic and experimental analysis. Experimental results show that the proposed 2-D receiving antenna could deliver the power homogeneously against its orientation, with less than 20% of variation of the possible maximum power.
authors.affiliation: Division of information Engineering and Telecommunications, Hallym University, Chuncheon, Korea.
authors.forename: Seon-Woo
authors.initials: SW
authors.lastname: Lee
authors.forename: Jong-Dae
authors.initials: JD
authors.lastname: Kim
authors.forename: Ju-Hyun
authors.initials: JH
authors.lastname: Son
authors.forename: Mun-Ho
authors.initials: MH
authors.lastname: Ryu
authors.forename: Jongwon
authors.initials: J
authors.lastname: Kim