Constantine G. Kakoyiannis was born in Athens, Greece, in June 1977. He received the Diploma (5-year degree) in electrical and computer engineering from the National Technical University of Athens, Greece, in 2000. He also received the Doctor of Electrical Engineering degree from NTUA in 2011. The field of study was energy-efficient compact antennas and arrays for wireless sensors and other small, non-handheld, portable devices. He has been a research associate with the Mobile Radio Communications Laboratory, National Technical University of Athens, Greece, since 2001. His research interests include the design and theoretical aspects of small antennas, active and parasitic antenna arrays, computational electromagnetics, multi-element antennas for wireless sensor networks, compact MIMO arrays, EBG and PBG structures, RF front-end design, and low-noise microwave transistor technology. Dr. Kakoyiannis is a member of the IEEE (APS, CASS, CES, COMSOC, MTTS), the European Microwave Association (EuMA), the Information Technology Society within the VDE (ITG/VDE), and the European Association on Antennas and Propagation (EurAAP). He received a ‘Best Paper’ award for work presented at the Third Int’l Conference on Sensor Technologies and Applications. He is an active reviewer with \EURASIP J. Wireless Communications and Networking\, \Progress in Electromagnetics Research\, \J. Electromagnetic Waves and Applications\, \IEEE Communications Letters\, \IEEE Trans. Parallel and Distributed Systems\, \IET Microwaves, Antennas & Propagation\ and \Int\'l J. Antennas and Propagation\.