Wednesday, July 30, 2014 - 2:00pm to 3:00pm
KEC 1005

Speaker Information

Hermann Schumacher
Director, Institute of Electron Devices and Circuits
Ulm University (Germany)


The seminar will provide an overview of research activities using Si/SiGe HBT and BiCMOS technologies in frontend ICs for a variety of communications and sensing applications. Examples include short range radars using both impulse radio ultra-wideband (I-UWB) and FMCW principles, spectrum sensing receivers for cognitive radio, circuits for 94 GHz radiometers, and complex transmit/receive modules for Ka band phased array antennas. Unique opportunities of a Si/SiGe BiCMOS technology incorporating also RFMEMS switches will be covered as well. A highlight, covered in some detail, is the realization of an IC combining four transmit/receive modules at 30 GHz, including RFMEMS switches, with an I2C bus transceiver, 8 digital-to-analog converters for phase and magnitude control, and a DC/DC converter supplying the necessary high voltages to the RFMEMS switches.

Speaker Bio

Hermann Schumacher received his doctorate in engineering (Dr.-Ing.) degree from RWTH Aachen, Aachen, Germany, in 1986. From 1986 to 1990, he was a member of technical staff at Bellcore, Red Bank, NJ, working on long-wavelength fiberoptic receivers and on early InP-based heterojunction bipolar transistors. In 1990, he joined Ulm University, Ulm, Germany as professor in the Institute of Electron Devices and Circuits. His research interests cover heterostructure devices (at present, most Si/SiGe HBTs and AlGaN/GaN HFETs) and their application in microwave and millimeter-wave circuits.

Hermann was the founder of one of the first English taught Master programs in electrical engineering in Germany and, for 17 years until June 2014, its director. He served as Vice President for Research for Ulm University from 2000-2003, and is now, in addition to his institute appointment, also the director of Ulm University’s School of Advanced Professional studies, which develops continuing education Master programs, a new strategic direction for Ulm University. This aspect will also be covered briefly in the presentation.