Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990liaco..29..211f&link_type=abstract
In ESA, From Ground-Based to Space-Borne Sub-mm Astronomy p 211-214 (SEE N91-21986 13-89)
Astronomy and Astrophysics
Astronomy
Heterodyning, Josephson Junctions, Radio Antennas, Radio Receivers, Radiometers, Sis (Superconductors), Submillimeter Waves, Frequency Division Multiplexing, Niobium Compounds, Nitrates, Research And Development, Waveguides
Scientific paper
Components for the key elements of submillimeter wave heterodyne receivers are described. The devices and components are inherently space qualifiable having low power and mass needs and exhibiting robustness. Nb and NbN superconductor insulator superconductor (SIS) tunnel junctions are selected for the nonlinear mixing element because of their robustness. NbN exhibits a large superconducting bandgap, allowing operation in excess of 1500 GHz. Both waveguide mounts, for the lower frequencies and planar antenna mixer mounts for the higher frequency range, are used. Quasi-optical components are used for frequency multiplexing and combining.
Frerking Margaret A.
Hunt B. D.
Leduc Henry G.
McGrath William R.
Siegel Paul H.
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