O
Oliver Ambacher
Researcher at Fraunhofer Society
Publications - 862
Citations - 29006
Oliver Ambacher is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Amplifier & Monolithic microwave integrated circuit. The author has an hindex of 64, co-authored 848 publications receiving 26256 citations. Previous affiliations of Oliver Ambacher include Osram & Siemens.
Papers
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Book ChapterDOI
Millimeter-Wave Monolithic Integrated Circuits and Modules for Safety and Security Applications
Michael Schlechtweg,Axel Tessmann,Axel Hulsmann,Ingmar Kallfass,Ingmar Kallfass,Arnulf Leuther,Rolf Aidam,Christian Zech,U. J. Lewark,Hermann Massler,M. Riessle,M. Zink,J. Rosenzweig,Oliver Ambacher +13 more
TL;DR: This paper presents some examples of S-MMICs developed for use in next generation systems for safety and security applications: a 460 GHz amplifier and a 300 GHz heterodyne receiver.
Journal ArticleDOI
Impact of Device Technology Processes on the Surface Properties and Biocompatibility of Group III Nitride Based Sensors
I. Cimalla,Florentina Will,Katja Tonisch,M. Niebelschütz,V. Cimalla,Vadim Lebedev,G. Kittler,Marcel Himmerlich,Stefan Krischok,J. A. Schaefer,Michael Gebinoga,Andreas Schober,T. Friedrich,Oliver Ambacher +13 more
TL;DR: In this paper, the impact of typical device processing steps on the surface properties (roughness, chemical composition, contact angle to water) of group III-nitride based chemical sensors with emphasis on the electrical performance of the sensor and the biocompatibility was investigated.
Diamond Schottky-Diode in a Non-Isolated Buck Converter
Richard Reiner,Verena Zuerbig,Lukas Pinti,Philipp Reinke,Dirk Meder,Stefan Moench,Fouad Benkhelifa,Ruediger Quay,Volker Cimalla,Christoph E. Nebel,Oliver Ambacher +10 more
TL;DR: In this article, a diamond Schottky-diode was used in a non-isolated buck converter for LED applications at mains voltage, achieving a maximum total efficiency of 87% at 14 W.
Proceedings ArticleDOI
Active millimeter-wave imaging using a raster scanner
Axel Hulsmann,Andreas Liebelt,Axel Tessmann,Arnulf Leuther,Michael Schlechtweg,Oliver Ambacher +5 more
TL;DR: In this paper, a millimeter-wave imaging system has been developed operating at a center frequency of 94 GHz, which has a single stationary mounted transmit and receive horn antenna and two moving mirrors in x and y.
Journal ArticleDOI
Magnetotransport measurement of effective mass, quantum scattering time, and alloy scattering potential of polarization‐doped 3D electron slabs in graded‐AlGaN
TL;DR: In this paper, a temperature-dependent study of Shubnikov de-Haas oscillations was performed to measure the effective mass and quantum scattering time of three-dimensional electron slabs.