Browsing by Author "WALBER, A."

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  • 183 GHz Mixer on InGaAs Schottky Diodes 
    OPREA, I.; WALBER, A.; COJOCARI, O.; GIBSON, H.; ZIMMERMANN, R.; HARTNAGEL, H. L. (Oxford, 2010)
    This work reports on experimental results of a 183 GHz sub-harmonically pumped mixer based on InGaAs antiparallel diode pair. The diode structure provides extremely low parasitic capacitance of about 2.5 fF. Roughly estimated ...
  • THz Schottky diodes on epitaxial AlGaAs-membrane 
    COJOCARI, O.; OPREA, I.; SYDLO, C.; ZIMMERMANN, R.; WALBER, A.; HENNEBERGER, R.; HARTNAGEL, H.-L. (IEEE, 2005)
    Schottky structures based on quasi-vertical diode (QVD) design concept are essentially improved by optimization of the GaAs/AlGaAs wafer layout and fabrication process. Insertion of a 4 mum-thin epitaxial AlGaAs layer ...

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