Novel Phase-Continuous Frequency Hopping Control for a Direct Frequency Synthesizer Using a Quadrature Mixer Driven by Two Ddss. - Kenichi Tajima; Ryoji Hayashi; Kenji Itoh; Yoji Isota (IEICE Trans. Electron., 2006)

A Novel Spur Suppression Technique Using Three-Phase Holding Pulse for High-Frequency-Output Direct Digital Synthesizer. - Kenichi Tajima; Ryoji Hayashi (IEICE Trans. Electron., 2010)

Parallel Dual Modulus Prescaler with a Step Size of 0.5. - Hideyuki Nakamizo; Kenichi Tajima; Ryoji Hayashi; Kenji Kawakami; Toshiya Uozumi (IEICE Trans. Electron., 2012)

A Compact RF Frontend Module of Active Phased Array Antenna for High SHF Wideband Massive MIMO in 5G. - Hideyuki Nakamizo; Shintaro Shinjo; Koji Tsutsumi; Satoshi Yamaguchi; Hideharu Yoshioka; Akihiro Okazaki; Akinori Taira; Kenichi Tajima (IEICE Trans. Electron., 2017)

A 0.3-to-5.5 GHz Digital Frequency Discriminator IC with Time to Digital Converter and Edge Counter for Instantaneous Frequency Measurement. - Akihito Hirai; Koji Tsutsumi; Hideyuki Nakamizo; Eiji Taniguchi; Kenichi Tajima; Kazutomi Mori; Masaomi Tsuru; Mitsuhiro Shimozawa (IEICE Trans. Electron., 2019)