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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Proceedings Article
Simulation and analysis of low-resistance AlGaN/GaN HFET power switches
TL;DR: In this article, the main parameters affecting the on-state resistance and influence of resistive metallization in lateral finger structures and large-area comb structures are analyzed and compared.
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Determination of strain and composition in SiC/Si and AlN/Si heterostructures by FTIR-ellipsometry
TL;DR: In this paper, Fourier transform infrared spectroscopic ellipsometry was used to obtain phonon frequencies of 3C-SiC and 2H-AlN layers on Ge modified Si(111) substrates.
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Defect-related noise in AlN and AlGaN alloys
Sebastian T. B. Goennenwein,R. Zeisel,S. Baldovino,S. Baldovino,Oliver Ambacher,Martin S. Brandt,Martin Stutzmann +6 more
TL;DR: The electronic noise properties of Si-doped AlN and Al0.3Ga0.7N are investigated in this article, where the potential energy barriers for capture into and emission from the ground state are quantitatively determined from the noise measurements.
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Markers prepared by focus ion beam technique for nanopositioning procedures
Henry Romanus,J. Schadewald,V. Cimalla,M. Niebelschütz,T. Machleidt,K. H. Franke,Lothar Spiess,Oliver Ambacher +7 more
TL;DR: In this article, the focus ion beam (FIB) technique is used to create self-organized surfaces and hierarchic patterns, which are then used to locate the probe on the sample with nanoscale accuracy.
Proceedings ArticleDOI
Low noise amplifiers for MetOp-SG
Markus Rosch,Axel Tessmann,Arnulf Leuther,Rainer Weber,Giuseppe Moschetti,Beatriz Aja,Mikko Kotiranta,Hermann Massler,Ville Kangas,Marie-Genevieve Perichaud,Michael Schlechtweg,Oliver Ambacher +11 more
TL;DR: In this article, low-noise amplifiers were developed in the framework of two pre-qualification ESA projects for frequencies between 54 and 229 GHz for the METOP-SG satellite program.