Adrianus Teunis (Aad) de Hoop was born in Rotterdam, the Netherlands, on 24 December 1927. He received his MSc-degree in Electrical Engineering (1950) and his PhD-degree in the Technological Sciences (1958) from Delft University of Technology, Delft, the Netherlands, both with the highest distinction (cum laude). He served Delft University of Technology as an Assistant Professor (1950-1957), Associate Professor (1957-1960) and Full Professor in Electromagnetic Theory and Applied Mathematics (1960-1996). Since 1996 he is Lorentz Chair Emeritus Professor in the Faculty of Electrical Engineering, Mathematics Computer Science of this University. In 1970 he founded at Delft the Laboratory of Electromagnetic Research, which has developed into a world-class center for electro-magnetics, having a huge impact on the world's electromagnetic community and on electromagnetic research and education in the Netherlands.