title: An asymmetric resonant coupling wireless power transmission link for Micro-Ball Endoscopy.
abstract: This paper investigates the design and optimization of a wireless power transmission link targeting Micro-Ball Endoscopy applications. A novel asymmetric resonant coupling structure is proposed to deliver power to an endoscopic Micro-Ball system for image read-out after it is excreted. Such a technology enables many key medical applications with stringent requirements for small system volume and high power delivery efficiency. A prototyping power transmission sub-system of the Micro-Ball system was implemented. It consists of primary coil, middle resonant coil, and cube-like full-direction secondary receiving coils. Our experimental results proved that 200mW of power can be successfully delivered. Such a wireless power transmission capability could satisfy the requirements of the Micro-Ball based endoscopy application. The transmission efficiency is in the range of 41% (worst working condition) to 53% (best working condition). Comparing to conventional structures, Asymmetric Resonant Coupling Structure improves power efficiency by 13%.
authors.affiliation: Institute of Microelectronics, Department of Electronic Engineering, Tsinghua University, China.
authors.forename: Tianjia
authors.initials: T
authors.lastname: Sun
authors.forename: Xiang
authors.initials: X
authors.lastname: Xie
authors.forename: Guolin
authors.initials: G
authors.lastname: Li
authors.forename: Yingke
authors.initials: Y
authors.lastname: Gu
authors.forename: Yangdong
authors.initials: Y
authors.lastname: Deng
authors.forename: Ziqiang
authors.initials: Z
authors.lastname: Wang
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Wang
mesh_terms: D053704:Capsule Endoscopy / Q000295:instrumentation* / Q000379:methods*; D011211:Electric Power Supplies; D004867:Equipment Design; D006801:Humans