PAM4 48-Gbit/s wireless communication using a resonant tunneling diode in the 300-GHz band. - Atsushi Oshiro; Naoki Nishigami; Takumi Yamamoto; Yosuke Nishida; Julian L. Webber; Masayuki Fujita; Tadao Nagatsuma (IEICE Electron. Express, 2022)