Karl F. Warnick is an associate professor in the Department of Electrical Engineering, Brigham Young University in Utah, where he earned his Ph.D. in electrical engineering. He is also coauthor of Problem Solving in Electromagnetics, Microwave Circuit, and Antenna Design for Communications Engineering (Artech House, 2006). Weng Cho Chew is a professor in the Electrical and Computer Engineering Department at the University of Illinois at Urbana-Champaign, and serves as the dean of faculty of engineering at the University of Hong Kong. He earned his Ph.D. in electrical engineering at the Massachusetts Institute of Technology. He is the coauthor of two books, over 300 journal articles, and more than 400 conference papers.