Tatsuo Itoh received his Ph.D. Degree in Electrical Engineering from the University of Illinois, Urbana in1969. He has worked at the University of Illinois, the Stanford Resarch Institute, the University of Kentucky, AEG Telefunken in Germany, and the University of Texas at Austin. In January 1991, he joined the University of California, Los Angeles as Professor of Electrical Engineering and holder of the TRW Endowed Chair in Microwave and Millimeter Wave Electronics. Dr. Itoh is a Fellow of the IEEE, and served as the Editor of IEEE Transactions on Microwave Theory and Techniques for 1983-1985. He was the President of the Microwave Theory and Techniques Society in 1990 and was a founding Editor-in-Chief for the IEEE Microwave and Guided Wave Letters from 1991 through 1994. He was elected as an Honorary Life Member of the MTT Society in 1994. Dr. Itoh was also the Chairman of Commissiono D of the International URSI from 1993-1996.