Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2019Automotive Antenna Roof for Cooperative Connected Driving
Artner, G.; Kotterman, W.; Galdo, G. del; Hein, M.A.
Journal Article
2018Polarization optimization of compact antenna arrays for direction of arrival estimation
Pralon, M.; Hein, M.; Thomä, R.; Pralon, L.; Pompeo, B.; Beltrao, G.; Galdo, G. del; Landmann, M.
Conference Paper
2017On the polarization effects of decoupling and matching networks on compact single-polarized antenna arrays for direction finding
Pralon, M.; Hein, M.; Thomä, R.; Pralon, L.; Pompeo, B.; Beltrao, G.; Galdo, G. del
Conference Paper
2017Polarization optimization of compact antenna arrays for direction of arrival estimation
Pralon, M.; Hein, M.; Thomä, R.; Pralon, L.; Pompeo, B.; Beltrao, G.; Galdo, G. del; Landmann, M.
Conference Paper
2017Suitability of compact antenna arrays for direction of arrival estimation
Pralon, M.G.; Galdo, G. del; Landmann, M.; Hein, M.A.; Thomä, R.S.
Journal Article
2016Ka-band user terminal antennas for satellite communications
Bayer, Hendrik; Krauss, Alexander; Zaiczek, Tobias; Stephan, Ralf; Enge-Rosenblatt, Olaf; Hein, Matthias A.
Journal Article
2015A dual-band compact L-Quad antenna array for radio localization
Pralon, Mariana G.; Popugaev, Alexander; Schulz, Dominik; Hein, Matthias A.; Thomä, Reiner S.
Conference Paper
2015Emulation of virtual radio environments for realistic end-to-end testing for intelligent traffic systems
Hein, M.A.; Bornkessel, C.; Kotterman, W.; Schneider, C.; Sharma, R.K.; Wollenschläger, F.; Thomä, R.S.; Galdo, G. del; Landmann, M.
Conference Paper
2015A high-power Ka-band single-pole single-throw switch MMIC using 0.25 µm GaN on SiC
Kaleem, S.; Kühn, J.; Quay, R.; Hein, M.
Conference Paper
2015Microwave monolithic integrated gallium-nitride switches for low static power reconfigurable switch matrix with passive transparent state for power failure redundancy
Kaleem, S.; Kühn, J.; Quay, R.; Hein, M.A.
Conference Paper
20143D wave-field synthesis for testing of radio devices
Schirmer, Christopher; Landmann, Markus; Kotterman, Wilhelmus A.T.; Hein, Matthias; Thomä, Reiner, S.; Galdo, Giovanni del; Heuberger, Albert
Conference Paper
2014Molecular doping for control of gate bias stress in organic thin film transistors
Hein, M.P.; Zakhidov, A.A.; Lüssem, B.; Jankowski, J.; Tietze, M.L.; Riede, M.K.; Leo, K.
Journal Article
2014Virtual electromagnetic environment for over-the-air testing of car-to-car and car-to-infrastructure communication
Sharma, R.K.; Schneider, C.; Kotterman, W.; Sommerkorn, G.; Große, P.; Wollenschläger, F.; Galdo, G. del; Hein, M.A.; Thomä, R.S.
Conference Paper
2013Correlation of absorption profile and fill factor in organic solar cells: The role of mobility imbalance
Tress, W.; Merten, A.; Furno, M.; Hein, M.; Leo, K.; Riede, M.
Journal Article
2013Over-the-air testing of cognitive radio nodes in a virtual electromagnetic environment
Sharma, Rajesh K.; Kotterman, Wim; Landmann, Markus H.; Schirmer, Christopher; Schneider, Christian; Wollenschläger, Frank; Galdo, Giovanni del; Hein, Matthias A.; Thomä, Reiner, S.
Journal Article
2013Statistical harmonic load termination analysis of switch-mode power amplifiers employing bandpass-pulse-length modulation
Krause, S.; Maroldt, S.; Zech, C.; Quay, R.; Hein, M.
Conference Paper
2012Phase separation analysis of bulk heterojunctions in small-molecule organic solar cells using zinc-phthalocyanine and C-60
Schunemann, C.; Wynands, D.; Wilde, L.; Hein, M.P.; Pfutzner, S.; Elschner, C.; Eichhorn, K.J.; Leo, K.; Riede, M.
Journal Article
201160 GHz ultrawideband hybrid-integrated dual-polarized front-end in LTCC technology
Müller, R.; Ariza, A.P.; Xia, L.; Wollenschläger, F.; Schulz, A.; Lopez-Diaz, D.; Elkhouly, M.; Thomä, R.S.; Hein, M.; Müller, J.
Conference Paper
2011Leaky-wave antenna
Wansch, R.; Schühler, M.; Hein, M.
Patent
2011Micro- and nano-electromechanical resonators based on SiC and group III-nitrides for sensor applications
Brueckner, K.; Niebelschütz, F.; Tonisch, K.; Foerster, C.; Cimalla, V.; Stephan, R.; Pezoldt, J.; Stauden, T.; Ambacher, O.; Hein, M.A.
Journal Article
2010AlGaN/GaN based heterostructures for MEMS and NEMS applications
Cimalla, V.; Röhlig, C.-C.; Lebedev, V.; Ambacher, O.; Tonisch, K.; Niebelschütz, F.; Brueckner, K.; Hein, M.A.
Conference Paper
2010Analysis and design of a planar leaky-wave antenna for mobile satellite communications based on a strongly truncated periodic structure
Schühler, M.; Wansch, R.; Hein, M.
Conference Paper
2010On strongly truncated leaky-wave antennas based on periodically loaded transmission lines
Schühler, M.; Wansch, R.; Hein, M.A.
Journal Article
2010Perspectives for mobile satellite communications in Ka-band (MoSaKa)
Hein, M.; Bayer, H.; Krauss, A.; Stephan, R.; Volmer, C.; Heuberger, A.; Eberlein, E.; Keip, C.; Mehnert, M.; Mitschele-Thiel, A.; Driess, P.; Volkert, T.
Conference Paper
2010Phase constant measurement of periodically structured surfaces - the leaky-wave region
Schühler, M.; Bauer, J.; Krauß, A.; Wansch, R.; Hein, M.A.
Journal Article
2010Piezoelectric actuated epitaxially grown AlGaN/GaN-resonators
Niebelschütz, F.; Brueckner, K.; Tonisch, K.; Stephan, R.; Cimalla, V.; Ambacher, O.; Hein, M.A.
Journal Article, Conference Paper
2009Experimental study of the radiation characteristics of a finite periodic structure excited by a dipole
Schühler, M.; Wansch, R.; Hein, M.
Conference Paper
2009Performance modification of SiC MEMS
Niebelschütz, F.; Brueckner, K.; Cimalla, V.; Hein, M.A.; Pezoldt, J.
Conference Paper, Journal Article
2009Resonant piezoelectric ALGAN/GAN mems sensors in longitudinal mode operation
Brueckner, K.; Niebelschütz, F.; Tonisch, K.; Stephan, R.; Cimalla, V.; Ambacher, O.; Hein, M.A.
Conference Paper
2009Wide band gap based MEMS for harsh environment applications
Cimalla, V.; Lebedev, V.; Röhlig, C.-C.; Ambacher, O.; Niebelschütz, F.; Tonisch, K.; Pezoldt, J.; Brueckner, K.; Hein, M.
Conference Paper
2008Impedance measurement of a dipole above a periodically structured reflective surface
Schühler, M.; Volmer, C.; Wansch, R.; Hein, M.
Journal Article
2008Isotropic dry-etching of SiC for AlGaN/GaN MEMS fabrication
Niebelschütz, F.; Pezoldt, J.; Stauden, T.; Cimalla, V.; Tonisch, K.; Brueckner, K.; Hein, M.; Ambacher, O.; Schober, A.
Conference Paper
2008Reduced mutual coupling in a compact antenna array using periodic structures
Schühler, M.; Wansch, R.; Hein, M.A.
Conference Paper
2008Two-dimensional electron gas based actuation of piezoelectric AlGaN/GaN microelectromechanical resonators
Brueckner, K.; Niebelschütz, F.; Tonisch, K.; Michael, S.; Dadgar, A.; Krost, A.; Cimalla, V.; Ambacher, O.; Stephan, R.; Hein, M.A.
Journal Article
2006Switched-line phase shifters with RF-MEMS and PIN-diodes
Schmidt, C.; Schühler, M.; Wansch, R.; Weber, J.; Hein, M.
Conference Paper
2005From graphs to manifolds - weak and strong pointwise consistency of graph Laplacians
Hein, M.; Audibert, J.-Y.; Luxburg, U. von
Conference Paper
2003Characterisation of a 300 x photovoltaic concentrator system with one- axis tracking
Hein, M.; Dimroth, F.; Siefer, G.; Bett, A.W.
Journal Article
2002Characterisation of a 25% high-efficiency fresnel lens module with GaInP/GaInAs dual-junction concentrator solar cells
Hein, M.; Meusel, M.; Baur, C.; Dimroth, F.; Lange, G.; Siefer, G.; Tibbits, T.N.D.; Bett, A.W.; Andreev, V.M.; Rumyantsev, V.D.
Conference Paper
2002Development of III-V-based concentrator solar cells and their application in PV-modules
Bett, A.W.; Dimroth, F.; Hein, M.; Lange, G.; Meusel, M.; Schubert, U.; Siefer, G.
Conference Paper
2002Entwicklung und Vergleich zweier konzentrierender Photovoltaik-Systeme für den wirtschaftlichen Einsatz von hocheffizienten III-V-Solarzellen
Hein, M.
Dissertation
2001Characterisation of a high concentration system with one-axis-tracking
Hein, M.; Bett, A.W.; Dimroth, F.; Siefer, G.
Conference Paper
200030 per cent monolithic tandem concentrator solar cells for concentrations exceeding 1000 suns
Bett, A.W.; Dimroth, F.; Lange, G.; Meusel, M.; Beckert, R.; Hein, M.; Riesen, S.V.; Schubert, U.
Conference Paper
2000All-glass terrestrial concentrator modules based on composite fresnel lenses and III-V solar cells
Andreev, A.; Rumyantsev, V.D.; Shvarts, M.Z.; Bett, A.W.; Dimroth, F.; Hein, M.; Letay, G.; Sulima, O.V.
Conference Paper
2000Concentrator array based on GaAs cells and fresnel lens concentrator
Andreev, A.; Bett, A.W.; Dimroth, F.; Hein, M.; Letay, G.; Rumyantsev, V.D.; Shvarts, M.Z.; Sulima, O.V.
Conference Paper
2000Progress in development of All-glass terrestrial concentrator modules based on composite fresnel lenses and III-V solar cells
Rumyantsev, V.D.; Andreev, V.M.; Bett, A.W.; Dimroth, F.; Hein, M.; Lamge, G.; Shvarts, M.Z.; Sulima, O.V.
Conference Paper
1998A propane-fueled thermophotovoltaic energy converter using low-bandgap photovoltaic cells
Gabler, H.; Hein, M.; Zenker, M.
Conference Paper
1998Thermophotovoltaik. Stand der Entwicklung
Gabler, H.; Hein, M.; Zenker, M.
Conference Paper
1989Beiträge zum 3. Workshop Planen und Konfigurieren
: Hein, M. (Hrsg.); Tank, W. (Hrsg.); Hertzberg, J. (Hrsg.)
Conference Proceedings