Recent Activities of Japanese Microwave Industry. - Koji Yamanaka; Yasunori Suzuki; Shoichi Narahashi; Takaya Wada; Makoto Kawashima; Ken Takei; Kazutaka Takagi; Atsushi Honda; Zhengyi Li 001; Liang Zhou; Yoji Ohashi; Wataru Hattori; et al. (IEICE Trans. Electron., 2015)

Highly-Reliable Rotating Polarization Wave Transceiver with Optimal Polarization Selection. - H. Yamada; Ken Takei (RWS, 2019)

Quaternion Model of Higher-Order Rotating Polarization Wave Modulation for High Data Rate M2M LPWAN Communication. - Zaid Ahmad; Shaiful Jahari Hashim; Fakhrul Zaman Rokhani; Syed Abdul Rahman Al-Haddad; Aduwati Sali; Ken Takei (Sensors, 2021)