Prof. Zhaoyun Duan has been dedicated to studying exotic metamaterials and their novel electromagnetic properties, with a particular focus on reversed Cherenkov radiation and enhanced transition radiation. Innovatively introducing metamaterials into the field of vacuum electronics, he has developed a series of brand-new electromagnetic wave radiation sources that are compact, high power, high efficiency, or high gain with his graduate students. He is a Deputy Dean of the School of Electronic Science and Engineering at the University of Electronic Science and Technology of China. He is an IET Fellow and a CIE Fellow. He is the Founding Chair of IEEE NPSS Chengdu Chapter. He has received important awards from the Ministry of Education of the People’s Republic of China and the People’s Government of Sichuan Province.