Keisuke Shinohara received the B.E., M.E., and the Ph.D. degrees in solid state physics from Osaka University, Japan, in 1994, 1996, and 1998, respectively. Since 2014, he has been with Teledyne Scientific & Imaging, where he is a principal scientist conducting R&D on GaN-based devices and MMICs for RF and power electronics applications. Prior to joining Teledyne, he was with Communications Research Laboratory in Tokyo, Japan between 1999 and 2004, Rockwell Scientific Company between 2004 and 2008, and HRL Laboratories between 2008 and 2014. He has authored or coauthored more than 130 journals and international conference papers including 40 invited presentations and 3 book chapters. He is a senior member of the IEEE. He served on the TPC of the IEDM, DRC, IPRM, LEC, ICNS, TWHM international conferences. He has been serving on the IEEE Microwave Theory & Technology Society (MTT-S) Technical Committee on Microwave and Millimeter-wave solid state devices (TC-9) as a vice-chair.