Junhui Rao (Graduate Student Member, IEEE) received the B.Eng. degree in microelectronic science and engineering from the University of Electronic Science and Technology of China, Chengdu, China, in 2020. He is currently pursuing the Ph.D. degree at the Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong. His current research interests include reconfigurable intelligent surfaces, microwave circuits, MIMO systems, millimeter wave, and 6G.