MOHINDER S. GREWAL, PhD, PE, is Professor of Electrical Engineering in the College of Engineering and Computer Science at California State University, Fullerton. ANGUS P. ANDREWS, PhD, was senior scientist (now retired) at the Rockwell Science Center in Thousand Oaks, California. CHRIS G. BARTONE, PhD, PE, is Professor of Electrical Engineering in the Russ College of Engineering and Technology, School of Electrical Engineering and Computer Science at Ohio University, Athens, Ohio.