ISSTT Proceedings

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Micromachined Millimeter-wave SIS-mixers

Authors:
Gert de Lange, Brian R. Jacobson, Arifur Rahman, Qing Hu
Abstract:
A heterodyne mixer with a micromachined horn antenna and a superconductor-isolator-superconductor tunnel junction as mixing element is tested in the 75-115 GHz frequency range. Experimental results show that the SIS mixers can be operated on thin Si3N4 membranes in a vacuum environment, and that the micromachined horn antenna can withstand repeated thermal cycling. A lowest DSB receiver noise temperature of 70 K is measured at 102 GHz with a 3-dB bandwidth of 15 GHz. Analysis of the noise measurements shows that the receiver noise is mainly limited by the reflection loss due to the capacitance of the tunnel junctions and therefore can be further improved by the use of integrated tuning elements.
Categories:
Antennas & Telescopes, Optics
Year:
1995
Session:
8
Full-text:
Download a PDF of this paper.
Page Number(s):
372-386