JIAJUN LIANG received his B.E. degree in electronic science and technique from the Guilin University of Electronic Technology, Guilin, China, in 2012, and a M.E. in radio physics from the University of Electronic Science and Technology of China, Chengdu, China, in 2015. He is currently pursuing a Ph.D. in information and communication engineering at Shenzhen University, Shenzhen, China. He is now an associate professor at Yulin Normal University. His current research interests include RF OAM antennas, filtering antennas and duplex antenna.