报告题目：Efficiency Calculator of Wireless Power Transfer System (E-WPT)
主讲嘉宾：Prof. Qiaowei Yuan, National Institute of Technology, Sendai College, Japan
时间：2018年3月26日（周一）  上午11:00
地点：365游戏大厅南区基础实验楼北座信息工程学院N710会议室
报告摘要：
To the wireless power transfer (WPT) system with arbitrary transmitting/Receiving elements, not only the maximum transfer efficiency (MTE), but also the optimum source and load impedance to achieve the maximum MTE have been derived from the impedance matching condition at the input and output ports by using S parameters. Certainly, they can be obtained by using Z parameters because S parameter and Z parameter can be transfer each other. In this lecture, firstly, the efficiency calculator of wireless power transfer system called as E-WPT will be introduced, then the examples of MTEs obtained by using S parameters and by using Z parameters will be demonstrated. Especially, the application of Z parameters to the WPT system using the magnetically coupling coils or resonance version will be described in detail, showing that the MTE and the optimum load impedance obtained by Z parameter agree with those based on the circuit theory. Finally, some videos related with WPT applications will be demonstrated.

嘉宾简介：
Qiaowei Yuan received the BE, ME, and PhD from Xidian University,　Xidian University, Xi’an, China, in 1986, 1989, and 1997, respectively. From 1990 to 1991, she was a special research student at Tohoku University, Sendai, Japan. From 1992 to 1995, she worked in Sendai Research and Development Laboratory, Matsushita Communication Company, Ltd., engaging in research and design of compact antennas for second generation mobile phones. From 1997 to 2002, she was a researcher in Sendai Research and Development Center, Oi Electric Company, Ltd., involved in researching and designing of small antennas for pager communications and the parabolic antenna for 26.5 GHz fixed wireless access (FWA) communication. From 2002 to 2007, she was a researcher with Intelligent Cosmos Research Institute, Sendai, Japan, involved in the research and development of adaptive array antennas and RF circuits for mobile communications. From 2007 to 2008, she was an Associate Professor of Tokyo University of Agriculture and Technology. She is currently Professor of National Institute of Technology, Sendai College. Dr. Yuan received the Best Paper Award and Zenichi Kiyasu Award in 2009 from the Institute of Electronics, Information and Communication Engineers (IEICE) of Japan. Dr. Yuan severed as the secretary of IEICE Technical Committee on Wireless Power transfer of Japan from 2013 to 2015. And she also was a visiting scholar at ElectroScience Laboratory of Ohio State University in USA from April 2015 to September 2015.