Multifunctional Partially Reflective Surface for Smart Blocks. - Jae Hee Kim; Dong-Jin Lee; Tae-Ki An; Jong-Gyu Hwang; Chi-Hyung Ahn (Sensors, 2021)

A Novel Directional Antenna for Next-Generation Fare Payment System. - Dong-Jin Lee; Tae-Ki An; In-June Hwang (IEEE Access, 2023)