Evolution of Computer Simulation Technologies for Surface and Bulk Acoustic Wave Devices, Review

Speaker:  Ken-ya Hashimoto, University of Electronic Science and Technology of China‌.

Time:        10:15 am, Nov.19th

Location: SIST 3-301

Host:        Tao Wu

Abstract:

Surface and bulk acoustic wave (SAW/BAW) devices are indispensable in the radio frequency front-end in current mobile communication equipment. Use of the latest computer environment is necessary for their research and development (R&D), and now R&D engineers pay much attention to the applicability of artificial intelligence to their activities.

The situation was quite different when the author started to study SAW devices at Chiba University in 1977: SAW devices were designed based on quite simple behavior models, and optimization called “carpet bombing” was performed experimentally because of inaccuracy of the computer simulation. Furthermore, the majority of researchers and engineers believed full-wave simulations were useless.

Bio:

Ken-ya Hashimoto was born in Fukushima, Japan, in 1956. He received the B.S. and M.S. degrees in electrical engineering from Chiba University, Chiba, Japan, in 1978 and 1980, respectively, and the D.Eng. degree from the Tokyo Institute of Technology, Tokyo, Japan, in 1989.

He joined Chiba University as a Research Associate in 1980 and retired there as a Professor Emeritus in 2021. From 2013 to 2015, he was the Director of the Center for the Frontier Science with Chiba University. Right after retirement, he moved to the University of Electronic Science and Technology of China (UESTC), Chengdu, China, as a professor.

He had Visiting Professor/Researcher positions in various institutions, such as the Helsinki University of Technology, Espoo, Finland, in 1998, the Laboratoire de Physique et Metrologie des Oscillateurs, CNRS, Besançon, France, in 1998/1999, Johannes Kepler University, Linz, Austria, in 1999 and 2001, the Institute of Acoustics, Chinese Academy of Science, Beijing, China, from 2005 to 2006, UESTC from 2009 to 2012, and the Shanghai Jiao Tong University, Shanghai, China, in 2015.

His current research interests include simulation and design of various high-performance surface and bulk acoustic wave devices, acoustic wave sensors and actuators, piezoelectric materials, and RF circuit design.