professor of electrophysics in 1961, dean of engineering in 1974, university professor in 1978, and university professor emeritus in 1994. In 1975 his wife Sima died, and a few years later Leo learned that he suffered from a rare form of muscular dystrophy that slowly wasted away his muscular system. To live closer to his family, he substantially reduced his activities at the Polytechnic in 1994 and joined Boston University as a professor in the Aerospace and Mechanical Engineering Department.
Leo was granted top-rank membership as life fellow in the Institute of Electrical and Electronics Engineers (IEEE), fellow of the Optical Society of America (OSA), and fellow of the Acoustical Society of America (ASA). He received many additional honors in his lifetime, which included a Guggenheim Fellowship in 1973, IEEE/APS Distinguished Lecturer in 1974, the Van der Pol Gold Medal from the International Radio Science Union (URSI) in 1975, the Humboldt Foundation Senior Scientist Award from the Federal Republic of Germany in 1980, the IEEE Centennial Medal in 1984, the IEEE Heinrich Hertz Gold Medal in 1991, the Antennas and Propagation Society Distinguished Achievement Award in 1998, and the IEEE Electromagnetics Award in 2003. In addition, he was granted many awards for distinguished papers authored or coauthored by him; also, he was honored with special recognition awards by academic institutes and professional societies for his excellence in teaching and research.
Throughout his career, Leo held named visiting professorships and fellowships and was invited to visit and lecture at distinguished universities and research institutes in the Soviet Union, Japan, China, Brazil, Korea, Israel, Germany, Turkey, Italy, and other European countries. In that context, he received honorary doctoral degrees from the Technical University of Denmark (1979); the University of Sannio, Italy (2003); the Technical University of Munich, Germany (2004); the Polytechnic University, New York (2005); and the Dogus University of Istanbul, Turkey (2005).
Leo’s most significant early achievement was the book Radiation and Scattering of Waves (Prentice-Hall, 1973) on which