题目/Title：An asymmetric resonant coupling wireless power transmission link for Micro-Ball Endoscopy

作者/Author：孙天佳,谢翔,李国林,谷荧柯,邓仰东,王自强,王志华
                        Tianjia Sun,Xiang Xie,Guolin Li,Yingke Gu,Yangdong Deng,Ziqiang Wang,Zhihua Wang

会议/Conference：EMBC 2010

地点/Location：Buenos Aires, Argentina

年份/Issue Date：2010.31 Aug.-4 Sept.

页码/pages：pp. 6531 - 6534

摘要/Abstract：
This paper investigates the optimization of wireless power transmission and its application to Micro-Ball Endoscopy. Wireless power transfer via novel Asymmetric Resonant Coupling structure is proposed to deliver power to Endoscopic Micro-Ball to read images after it’s excreted from human body. The most important advantage of this structure is its applicability to medical applications with very limited volume on secondary side and requirement for very high power deliver efficiency. To evaluate this structure precisely, a circuit model considering skin, proximity, eddy, and radiation effects is analyzed in detail. Theoretical calculation and progress of optimization is given. Prototype of Micro-Ball including primary, middle resonant and cub-like full-direction secondary receive coils indicates 200mW can be successfully delivered, which can meet the requirement of the Micro-Ball endoscopy application. For the worst-case orientation between primary and secondary side, the efficiency reaches 41%, and for the best-case orientation, the efficiency is 53%. Comparing to conventional structure, Asymmetric Resonant Coupling Structure improves power efficiency by 13%.