A sophisticated analysis procedure for an MMIC phase shifter. - Kohei Fujii (IEEE J. Solid State Circuits, 1998)

Six-port based wave-correlator with application to beam direction finding. - Toshiyuki Yakabe; Fengchao Xiao; Kenji Iwamoto; Fadhel M. Ghannouchi; Kohei Fujii; Hatsuo Yabe (IEEE Trans. Instrum. Meas., 2001)

Vibratory Energy Harvester for Human Centered Transportation System Applications. - Takayuki Fujita; Kohei Fujii; Toshikazu Onishi; Kazusuke Maenaka; Kohei Higuchi (ICETET, 2011)

Development of Electret Energy Harvester with Micro Spacer. - Kohei Fujii; Toshikazu Onishi; Koji Sonoda; Takayuki Fujita; Kensuke Kanda; Kohei Higuchi; Kazusuke Maenaka (ICETET, 2012)

Position estimation method which is suitable for highly magnetic saturation of IPMSM. - Kohei Fujii; Yang Zhao; Shinji Doki (IECON, 2012)