QIANG REN, PhD, is Associate Professor at the Electronics and Information Engineering School of Beihang University, Beijing. He has authored or coauthored over 80 papers in refereed journals and conferences. SU YAN, PhD, is an Assistant Professor and Director of Graduate Studies in the Department of Electrical Engineering and Computer Science at Howard University, Washington, DC. He is a Senior Member of IEEE and a Life Member of the Applied Computational Electromagnetics Society. ATEF Z. ELSHERBENI, PhD, is a Professor of the Electrical Engineering Department at the Colorado School of Mines. He is a Life IEEE Fellow and a Fellow of Applied Computational Electromagnetic Society.