Gerhard R. Olbrich received his Dipl.-Ing. degree in 1974 and his Dr.-Ing. degree in 1979, both in electrical engineering from the Technische Universität München, Germany.

From 1975 to 1985 he was Assistant Professor at the Institute of Microwave Engineering and later on at the Institute of High Frequency Engineering at the Technische Universität München. During this time he worked on problems of microwave S-parameter and frequency measurements and planar hybrid circuits using thinfilm technology up to 90 GHz.

From 1986 to 1988 Dr. Olbrich was president of Work Microwave GmbH, Holzkirchen, Germany, mainly engaged in developing low phase noise microwave oscillators.

Since 1989 he has again been with the Institute of High Frequency Engineering of the Technische Universität München and is now Director of Research (Akademischer Direktor). His current interests are in the fields of RF and microwave measurement techniques, active and passive device modeling, planar hybrid and integrated circuits, and low phase noise oscillators. The investigated frequency range reaches up to 110 GHz. Dr. Olbrich has served as a member of paper review boards and steering committees of various international conferences. Dr. Olbrich is a member of the IEEE and of the German Informationstechnische Gesellschaft VDE (ITG).

• RF and microwave S-parameter measurement techniques, (koaxial, waveguide and on-wafer)^
• low frequency and high frequency noise measurements
• large signal and noise modelling of active (MESFET, HEMT, BJT, HBT ...) and passive devices up to 60 GHz
• investigations on nonlinear circuits, especially oscillators for RF and microwaves