报告1：Introduction of Electromagnetic Engineering Laboratory: History, Current Research, and Future Planning
The electromagnetic engineering laboratory is one of the radio frequency research laboratories in the engineering school of Tohoku University. The major researches include the antenna engineering for various wireless systems, microwave imaging, and computational electromagnetics. In this talk, the pioneering researches and achievements in the history of the laboratory such as Yagi-Uda antennas and self-complementary antennas are introduced. Some current researches including the development of passive millimeter-wave imaging system, RFID reader antennas, and small antennas for wireless capsule are described.
Qiang Chen received the B.E. degree from Xidian University, Xi'an, China, in 1986, the M.E. and D.E. degrees from Tohoku University, Sendai, Japan, in 1991 and 1994, respectively. He is currently Chair Professor of Electromagnetic Engineering Laboratory with the Department of Communications Engineering, Faculty of Engineering, Tohoku University. His primary research interests include antennas, microwave and millimeter wave, electromagnetic measurement and computational electromagnetics.
Dr. Chen serves as Chair of Technical Committee on Wireless Power Transfer of Institute of Electronics, Information and Communication Engineers (IEICE), and Tokyo Chapter Chair of IEEE Antennas and Propagation Society. He is a Fellow of IEICE.
报告2：Efficiency Calculator of Wireless Power Transfer System (E-WPT)
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.
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.