Clemens C.W. Ruppel was born in Munich, Germany, in 1952. In 1978 he received the Diploma in mathematics from the Ludwig-Maximilians University of Munich, Germany. Afterwards he has participated in research projects, solving mathematical problems related to bio chemistry and power plant safety. In 1981 he joined the micro-acoustics research group at Siemens AG as a doctorante student. In 1986 he received his Ph.D. degree for works on the design of surface acoustic waves (SAW) filters from the technical University of Vienna, Austria.

In 1984, he became member of the micro-acoustic group at the Corporate Research and Development of Siemens AG in Munich. In 1990, he became Group Manager. He was responsible for the development of software for the simulation and synthesis of SAW filters.

Since 1991, he has been a member of the Technical Program Committee of the IEEE Ultrasonic Symposium, since 1997 of the IEEE Frequency Control Symposium, and since 1998 of the European Frequency and Time Forum. In 2000 he has become an elected committee member of the IEEE UFFC AdCom. He has been a voting member of IEEE 802.11. He has been a member of Sociéte Chronométrique de France.

His research interests include all SAW related subjects, especially the design of bandpass filters, dispersive transducers, low-loss flters, and mathematical procedures and algorithms needed for the design and simulation of SAW devices. He is author/co-author of approximately 60 papers (including 9 invited papers) on the design and simulation of SAW filters, and sensor based on SAW devices. He has been editor of two books "Advances in Surface Acoustic Wave Technology, Systems and Applications, Volume 1&2".