报告题目：Robust method to retrieve the constitutive effective parameters of metamaterials
报告人：陈旭东教授新加坡国立大学(National University of Singapore)
This talk introduces an improved method to retrieve the effective constitutive parameters (permittivity and permeability) of a slab of metamaterial from the measurement of S parameters. Improvements over existing methods include the determination of the first boundary and the thickness of the effective slab, the selection of the correct sign of effective impedance, and a mathematical method to choose the correct branch of the real part of the refractive index. The sensitivity of the effective constitutive parameters to the accuracy of the S parameters is also discussed. The method has been applied to various metamaterials and the successful retrieval results prove its effectiveness and robustness.
Xudong Chen received the B.S. and M.S. degrees in electrical engineering from Zhejiang University, China, in 1999 and 2001, respectively, and the Ph.D. degree from the Massachusetts Institute of Technology, Cambridge, MA, USA, in 2005. Since then, he joined the National University of Singapore, Singapore, where he is currently an Associate Professor. His research interests are mainly electromagnetic wave theories and applications, in particular with a focus on inverse problems and imaging. He has published 140 journal papers on inverse scattering problems, material parameter retrieval, microscopy, and optical encryption. He has authored the book Computational Methods for Electromagnetic Inverse Scattering, Wiley, 2018. Dr. Chen was a recipient of the Young Scientist Award by the Union Radio-Scientifique Internationale in 2010. He has been an Associate Editor of the IEEE Transactions on Microwave Theory and Techniques since 2015. He has organized twenty sessions on the topic of inverse scattering and imaging in various conferences.
He has pioneered research, design and development of frequency selective surfaces (FSS) for communication systems, Metamaterials and low SAR antennas for mobile telephony and has commercially exploited a number of his innovations.