二、主讲人：香港大学Lijun Jiang 副教授
Due to the climbing frequencies and expanding signal bandwidths, electromagnetic modeling methods and relevant tools have become indispensable to most modern microwave engineering and antenna technologies. Attributed to macroscopic properties of materials and Maxwell’s equations, the electromagnetic analysis was mostly limited to linear situations. However, emerging from advancing technology developments, a new challenge has appeared to frequently request new efforts in electromagnetic modeling methodologies – nonlinearity. Its study is demanded by both engineering and scientific researches. Unfortunately, it is rarely mentioned in today’s electromagnetic society.
This talk will discuss several nonlinear electromagnetics issues we have encountered, studied and solved at the Electromagnetics and Optics Laboratory, HKU:
First, a hybridization system of parasitic components and lumped elements can easily need the nonlinearity compatibility through the solutions. A hybridization of DGTD and MNA solvers have been proposed to solve this issue in the electromagnetic domain instead of circuit domain to maintain the high frequency electromagnetic property as much as possible.
Secondly, how to solve or prepare the solving of nonlinear behaviors of IC technologies that has not been developed? A growing model built by artificial neural network (ANN) through Machine Learning (ML) with computational electromagnetic methods is proposed to support the technology preview before it is ready. A new Machine Learning based Method of Moments (ML-MOM) will be introduced, too.
Thirdly, when the matter response to the electromagnetic wave is not linear anymore, how could we get the numerical solution for general plasmonic structures? A new nonlinear PMCHWT integral equation method is proposed to solve the surface nonlinearity of centrosymmetric noble metal nano particles. Interesting spin-orbital interactions (SOI) can be observed by taking advantage of this newly developed numerical capability.
By demonstrating benchmarks to above mentioned challenges, the talk intends to show the significance of nonlinearity in modern electromagnetic modeling and its solution clues derived from linear methodologies.
Lijun Jiang (S’01-M’04-SM’13) received B.S. degree in Electrical Engineering from the Beijing University of Aeronautics and Astronautics in 1993, M.S. degree from the Tsinghua University in 1996, and Ph.D from the University of Illinois at Urbana-Champaign (UIUC) in 2004. From 1996 to 1999, he was an application engineer with the Hewlett-Packard Company. From 2004 to 2012, he worked at IBM T.J. Watson Research Center in. Since the end of 2009, he has been an Associate Professor with the Department of Electrical and Electronic Engineering at the University of Hong Kong (Tenured in 2014). Since Sept. 2014, he is also a frequent Visiting Scholar at the University of California at Los Angeles. Currently he is the director of Electromagnetics and Optics Laboratory, the University of Hong Kong.
In 1998 he received the HP STAR Award. In 2003 he received the IEEE MTT Graduate Fellowship Award. In 2004 he received the Y.T. Lo Outstanding Research Award. In 2008 he received the IBM Research Technical Achievement Award. In 2016 he received the Outstanding Technical Contribution Award at 2016 APEMC. The research team he built at the University of Hong Kong has received many international awards including the 1st Place Best Student Paper Award of 2014 ACES in FL, the 23th IEEE EPEP Best Paper Award in Oregon, Young Scientist Award of 2016 EMTS in Finland, the Best Poster Paper Award of 2016 IEEE EPEPS in San Diego, Best Student Symposium Paper Award First Place and President's Memorial Award Presented in Memory of Guy deBurgh and Bill Kimmel of 2016 IEEE Int. Symposium on EMC in Canada, etc.
He is the IEEE Senior Member, the Associate Editor of IEEE Transactions on Antennas and Propagation, the Editor of Progress in Electromagnetics Research, the Associate Guest Editor of the Proceedings of IEEE Special Issue in 2011~2012, an IEEE AP-S Member, an IEEE MTT-S member, and an ACES member. He was the General Chair, TPC Chair, Session Organizer, and Session Chair of many international conferences. He reviews manuscripts for most internal microwave and electromagnetics journals.
His research interests focus on applied heterogeneous electromagnetics, antenna and microwave engineering, electromagnetic material engineering, etc.
编辑：罗莎 / 审核：林坤 / 发布者：林坤