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 ArticleDOI
A U-band broadband power amplifier MMIC in 100 nm AlGaN/GaN HEMT technology
Dirk Schwantuschke,Peter Brückner,Rudiger Quay,Michael Mikulla,Oliver Ambacher,Ingmar Kallfass +5 more
TL;DR: In this paper, a three-stage broadband power amplifier with a gate-length of 100 nm in a grounded coplanar transmission line technology was designed and manufactured for the U-band frequency range from 38 to 62 GHz (U-band).
Proceedings ArticleDOI
Characterization of quasi-optical focusing systems at W-band frequencies
TL;DR: In this paper, a millimeter wave beam which is focused by parabolic mirrors is scanned in 3D by a movable Rx horn antenna, and the beam can then be visualized and analyzed using a Gaussian beam model.
Proceedings Article
Signal generation and amplification up to 600 GHz using metamorphic HEMT technology
TL;DR: In this paper, an overview of advanced millimeter-wave and sub-millimeterwave monolithic integrated circuits for applications around 600 GHz, recently realized using 35 nm InAlAs/InGaAs based depletion-type metamorphic high electron mobility transistor (mHEMT) technology in combination with grounded coplanar circuit topology (GCPW) with a reduced ground-to-ground spacing.
Proceedings ArticleDOI
Radar system components to detect small and fast objects
Axel Hulsmann,Christian Zech,Mathias Klenner,Axel Tessmann,Arnulf Leuther,D. Lopez-Diaz,Michael Schlechtweg,Oliver Ambacher +7 more
TL;DR: Small and fast objects, for example bullets of caliber 5 to 10 mm, fired from guns like AK-47, can cause serious problems to aircrafts in asymmetric warfare.
Journal ArticleDOI
Investigation of dielectric properties of multilayer structures consisting of homogeneous plastics and liquid solutions at 75–110 GHz
Mathias Klenner,T. Abels,Christian Zech,Axel Hulsmann,Michael Schlechtweg,Oliver Ambacher,Oliver Ambacher +6 more
TL;DR: In this paper, an active 3D millimeter wave imaging system is used for characterization of the dielectric function of different plastic materials and liquid solutions, based on reflection spectroscopy at frequencies between 75 and 110 GHz.