Speaker 1: Professor Liang Zhou
School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University
Multiphysics (MP) Methods for Modeling and Simulating RF devices/circuits under Intentional Electromagnetic Interference (IEMI)
In the past a few years, special attention has been focused on intentional electromagnetic interference (IEMI) effects on communication systems. High power electromagnetics (HPEM), as it is sometimes known, “EM Terrorism,” is a new area of concern for public and commercial interests. Transceivers can be easily interfered and their RF devices/circuits can be even damaged under IEMI. In this talk, the electro-thermal-stress (E-T-S) multi-physics method is used to simulate and analyze the interactions of RF devices and electromagnetic pulses. It has been found the parameters of the electromagnetic pulse such as widths, numbers and repetition frequencies affect the thermal and stress of the RF devices. The device breakdown phenomena are observed under a scanning electron microscope (SEM) where the crack curve due to unrecoverable deformation in the device is displayed. Simulation, measurements, and calculations show some correlations.
Liang Zhou received the Ph.D. degree in electrical engineering from the University of York, UK, in 2005. From 2005 to 2006, he was a Senior RF Engineer with Motorola INC, where he involved in power amplifier design for the next generation of base station transceivers. Since May 2006, he joined the Key Laboratory of Ministry of Education of Design and Electromagnetic Compatibility of High-Speed Electronic Systems, Shanghai Jiao Tong University, China. He became a full professor from Jan. 2017. He has been a visiting scholar with the Massachusetts Institute of Technology, Cambridge, U.S.A and a research fellow with the Institute for Electronics Engineering (LTE) of the Friedrich-Alexander-University Erlangen-Nurnberg, Germany, granted by the Alexander von Humboldt-Stiftung, Germany. He is IEEE EMC society Distinguished Lecturer from 2019, and Shanghai Chapter Chair from 2015. His main research interests include system on packaging (SOP) design and modeling, EMC and High Power Microwave (HPM) protection of communication platforms, and multi-physics and its application.
Dr. Zhou was the recipient of National Science Fund for Excellent Young Scholars in 2018, Alexander von Humboldt (AvH) research fellowship in 2016, APEMC Young Scientist Award in 2016, the Research Grant of the Okawa Foundation (Japan) in 2016, the International Union of Radio Science (URSI) Young Scientist Award in 2014, the best paper awards of Cross Strait Quad-Regional Radio Wireless Conference (CSQRWC) in 2014, and the National Science and Technology Advancement Award of China in 2012.
Speaker 2: Professor Keizo Cho
Department of Information and Communication Systems Engineering
Faculty of Engineerin, Chiba Institute of Technology
Improvement of location estimation accuracy applying virtual array technique to synthetic aperture array for terahertz time domain spectroscopy
Teraherz (THz) wave has received much attention as a useful tool of material inspection and non-destructive inspection because of its distinctive reflection and transmission characteristics for various materials. Particularly, time domain spectroscopy (TDS) measurement using THz pulse is attracting attention because wide frequency characteristics can be utilized. The transmitting wave is usually focused in the THz-TDS measurement to increase the spatial resolution, however, the drawback of using the focused beam is that it takes time to scan the whole observation plane. Measurement time can be reduced by using collimated transmitting wave so that it becomes possible to observe a wide surface at once, However the spatial resolution is degraded. Synthetic aperture array using super resolution direction of arrival (DOA) estimation method is a promising method to increase the spatial resolution. MUSIC (Multiple Signal Classification) is a typical DOA estimation algorithm. However, the estimation accuracy of the MUSIC algorithm is degraded when incoming waves are correlated.
This talk will first present the position estimation results when conventional beamforming algorithm and MUSIC are applied to a synthetic aperture array in the THz-TDS. Then, we will examine the effectiveness of applying array interpolation and spatial averaging techniques to the MUSIC method in order to improve the position estimation accuracy. The measurement results for two target extraction will be also shown.
Keizo Cho received his B. E. degree from Yokohama National University, Japan, in 1986 and his M. E and Dr. Eng. Degrees from Tokyo Institute of Technology, Japan, in 1988 and 2002, respectively. He joined NTT Radio Communication Systems Laboratories, Japan, in 1988. He has been engaged in the research and development of antennas for mobile communication systems. He was a visiting researcher at the Communication Research Laboratory, McMaster University, Hamilton, Ontario, Canada from 1994 to 1995. He was a Group Leader of Antenna Research Group of NTT Network Innovation Laboratories from 2002 to 2003, and a Group Leader of the RF Technology Research Group of Research Laboratories, NTT DOCOMO, INC., Japan from 2003 to 2012. Since April 2012, he has been with Chiba Institute of Technology, Chiba, Japan, where he is currently dean of the Faculty of Engineering and a professor in Department of Information and Communication Systems Engineering. He has been serving as a committee member of various technical societies and international meetings, such as the Chair of the IEEE APS Japan Chapter, the Chair of the Committee on Antennas and Propagation of the IEICE, the Vice-Chair of the Steering Committee of 2016 International Symposium on Antennas and Propagation (ISAP2016), and Editor of the IEICE Transaction on Communications. He received the Young Researcher’s Award in 1995, the Best Paper Award in 2009 and Educational Service Award in 2019 from the IEICE. He is a senior member of the IEEESpe.
Speaker 3: Dr. Tom De Muer
Design And Test Software, Keysight Technology
The role of electro-magnetic simulations tools in design and test environments
The capability of electronic circuits evolves at a tremendous pace. A pace that is driven by consumer and business demand and supported by advances in production technology. The time a company takes to get from specifications and requirements to a full finished product has become a critical element in its competitive position. A difficult chasm to cross in the product life cycle is going from a design to a verified working initial batch of devices. Often this requires correlating a failure during testing back to a design flaw. Efficient and accurate simulation of end-to-end performance of full systems plays an important role during this phase. By further shrinking of devices and the economical driven desire to bring functionality under single packages, Electro-Magnetic effects become ever more important. Accurate prediction of these effects is computationally intensive and although computational resources increase at similar rates as technology, it is tough to take advantage of all those computational resources.
In this talk we will present those challenges and how they have been overcome in the past and look to the future. We envision that in the future a large mix of techniques will be required to simulate the performance of complete systems without requiring users of these tools to be experts. This requires a combination of state-of-the-art computational technology and application domain knowledge. That domain knowledge is needed inside the tools to break these systems in meaningful parts for simulation and recombine them into complete solutions as if we were dealing with a single system. When we reach that level of convenience it companies can significantly reduce the time it takes to get their products into the market.
Tom De Muer received his M Sc and PhD in Computer Engineering degrees from Ghent University,
Belgium in 2001 and 2006 respectively. He has been a senior researching in the Institute for BroadBand
Technology working on technology valorization. Since 2006, he joined Keysight Technologies where he
is principal software architect for Electro-Magnetics solutions. During his career he has been working on
3D EM methods and more recently focuses on solutions solving the large problems that designers of
electronics face today in their day to day work. He is also responsible for solutions that form a bridge
between design and test teams in the new PathWave platform from Keysight Technologies.