Youssef Tawk is an assistant professor at Notre Dame University Louaize, Lebanon. He received a Ph.D. in electricalengineering and completed a post-doc fellowship from the University of New Mexico.Joseph Costantine is an assistant professor at the American University of Beirut, Lebanon. He received a Ph. D. inelectrical engineering from the University of New Mexico. Christos G. Christodoulou is a Fellow member of IEEE and adistinguished professor of electrical and computer engineering at the University of New Mexico. He is the recipient ofthe 2010 IEEE John Krauss Antenna Award for his work on reconfigurable fractal antennas, the Lawton-Ellis Award andthe Gardner Zemke Professorship at the University of New Mexico. He holds a M.S. and a Ph.D. in Electrical Engineeringfrom North Carolina State University. Christos is the series editor of antennas at Artech House.