A broad-band low-noise SIS receiver for submillimeter astronomy

Details A broad-band low-noise SIS receiver for submillimeter astronomy A broad-band low-noise SIS receiver for submillimeter astronomy

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988itmtt..36.1720b&link_type=abstract

(IEEE, International Microwave Symposium, 25th, New York, NY, May 25-27, 1988) IEEE Transactions on Microwave Theory and Techniq

Astronomy and Astrophysics

Astronomy

19

Heterodyning, Lead Alloys, Low Noise, Radio Astronomy, Sis (Superconductors), Spiral Antennas, Submillimeter Waves, Astronomical Observatories, Broadband, Double Sideband Transmission, Noise Measurement, Noise Temperature, Receivers, Superconductors

Scientific paper

A quasi-optical heterodyne receiver using a Pb-alloy superconductor-insulator-superconductor (SIS) tunnel junction as the detector and a planar logarithmic spiral antenna for the RF coupling is described, and its performance is compared with a the predicted performance of a theoretical model. Noise measurements were made in the laboratory at frequencies between 115 GHz and 761 GHz, yielding double-sideband noise temperatures ranging from 33 K to 1100 K. The receiver has also been used for astronomical spectroscopy on the Caltech Submillimeter Observatory (Mauna Kea, Hawaii) at 115, 230, 345, and 492 GHz.

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