An investigation on the radiation characteristics of Plano-Convex and Hyperbolic-Planar lens antennas working at 270 GHz. - Nguyen Dinh Thai; Nguyen Thi Dieu Linh; Tong Van Luyen; Quoc Dinh Nguyen; Phan Van Hung; Yoshihide Yamada (ICCAIS, 2023)