Carlos Salema is a professor of telecommunication systems at the Instituto Superior T?cnico (IST), Technical University of Lisbon, Portugal, and director of the Instituto de Telecomunica??es. He holds a Ph.D. in electrical engineering from the University of London and an Agregate degree in propagation and radiation of electromagnetic fields from the IST. Carlos Fernandes is a professor of microwave propagation and antennas at the IST, where he earned a Ph.D. in electrical engineering. Rama Kant Jha is a professor of electronics engineering at the Institute of Technology, Banaras Hindu University, India, where he earned a Ph.D. in electronics engineering.