Kai-Da Xu received the B.Eng. and Ph.D. degrees in electromagnetic fields and microwave technology from the University of Electronic Science and Technology of China in 2009 and 2015, respectively, and a second Ph.D. degree from Tohoku University, Japan, in 2024. He is currently a Professor and Doctoral Supervisor at the School of Information and Communications Engineering, Xi’an Jiaotong University, China. He has held research positions at Duke University, the City University of Hong Kong, the University of Wisconsin–Madison, Tohoku University, Yokohama National University, and the University of Alcalá. His research interests include RF, microwave, millimeter-wave, and terahertz integrated circuits and devices, microwave filters, antennas, spoof surface plasmon polaritons, metamaterials, and artificial-intelligence-assisted electromagnetic design. He is an IEEE Senior Member and has been selected as a JSPS Research Fellow and a Marie Skłodowska-Curie Fellow. He received the Electronics 2023 Young Investigator Award.