Dr. Seong-Tae Han

Seong-Tae Han (Senior Member, IEEE) received Ph.D. degrees in physics from Seoul National University (SNU), Seoul, South Korea, in 2005. He was a researcher with the Research Institute of Basic Science, SNU in 2005. In September 2005, he joined the Plasma Science and Fusion Center, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA, as a Postdoctoral Research Associate, where he worked on sub-THz gyrotrons (140 and 460 GHz) for DNP/NMR research and measurements of extreme loss in components of 170-GHz ITER ECH transmission line. Since 2008, he has been a Senior and a Principal Researcher with the Korea Electrotechnology Research Institute (KERI), Changwon, South Korea, where he is currently the Director of the Electrophysics Research Center. He is also a Professor with the Department of Energy and Power Conversion Engineering, University of Science and Technology, Daejeon, South Korea. As a Research Assistant, he has participated in developing ultra-wideband TWTs for electronic warfare and satellite communication at the X-band. He built the first-working LIGA (deep etched X-ray lithography and electroforming) fabricated folded waveguide TWT operating with the Ka-band. His research interests include novel vacuum electron devices employing recent innovations, such as photonic crystals and cold cathodes based on nano/MEMS technologies, high-power microwave, and electron sources and their applications for industry.