The modem for ultra-wideband communication employing surface-acoustic-wave devices. - H. Nagasaka; T. Sato; Tsuyoshi Sugiura; Eiichiro Otobe; M. Hasegawa; Koki Tanji; Norihisa Otani; Tsuyoshi Shimamori (ISCAS (4), 2005)

High Efficiency Class-E and Compact Doherty Power Amplifiers with Novel Harmonics Termination for Handset Applications. - Tsuyoshi Sugiura; Satoshi Furuta; Tadamasa Murakami; Koki Tanji; Norihisa Otani; Toshihiko Yoshimasu (IEICE Trans. Electron., 2019)

79-GHz Four-RFIC Cascading Radar System for Autonomous Driving. - Jongseok Kim; Byungkwan Kim; Sungdo Choi; Hyun-Woong Cho; Woosuk Kim; Minsung Eo; Seungtae Khang; Seongwook Lee; Tsuyoshi Sugiura; Artem Nikishov; Koki Tanji; Anton Lukyanov (ISCAS, 2020)

A D-Band Sub-Harmonically Pumped Mixer with High LO Suppression Using 250-nm InP DHBT P-N Junction. - Shinji Hachiyama; Koki Tanji; Toshihide Kuwabara; Naoki Oshima; Kazuaki Kunihiro; Tomoya Kaneko (BCICTS, 2023)

D-Band 4-ch Antenna-on-Chip Phased-Array TX Front-End. - Toshihide Kuwabara; Naoki Oshima; Koki Tanji; Noriaki Tawa; Shinji Hachiyama; Tomoya Kaneko (BCICTS, 2023)