Analysis and Design of a Full 360 degrees, Harmonic-Suppressed Hybrid Coupler Phase Shifter. - Chai-Eu Guan; Ahmed I. A. Galal; Nagamitsu Mizoguchi; Akira Ishikawa; Shugo Fukagawa; Ryuji Kitaya; Haruichi Kanaya (IEICE Trans. Electron., 2017)

A Compact and Broadband Circularly Polarized Printed Monopole Antenna for UHF RFID. - Takafumi Fujimoto; Naoto Otsuka; Chai-Eu Guan (RFID-TA, 2021)