Professor Sergei A. Tretyakov (Fellow, IEEE) received his Dipl. Engineer-Physicist, the Candidate of Sciences (PhD), and Doctor of Sciences degrees (all in radiophysics) from the St. Petersburg State Technical University, Russia, in 1980, 1987, and 1995, respectively. From 1980 to 2000 he was with the Radiophysics Department of the St. Petersburg State Technical University. From 2000 he has been working in Helsinki University of Technology, Finland, which became Aalto University in 2010, after a merge with two other universities in Helsinki. Presently, he is professor of radio science at the Department of Radio Science and Engineering, Aalto University, Finland. The main scientific interests of professor S. Tretyakov are electromagnetic field theory, complex media electromagnetics, antennas, and microwave engineering. He is the author or co-author of four research monographs, 16 book chapters, and more than 240 journal papers.