A Fixed Tuned SIS Receiver for the 450 GHz Frequency Band

Details A Fixed Tuned SIS Receiver for the 450 GHz Frequency Band A Fixed Tuned SIS Receiver for the 450 GHz Frequency Band

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995stt..conf..123b&link_type=abstract

Proceedings of the Sixth International Symposium on Space Terahertz Technology, held March 21-23, 1995, at California Institute

Astronomy and Astrophysics

Astrophysics

10

Scientific paper

We report on the development of a heterodyne receiver designed to cover the frequency range 400 - 500 GHz. This receiver incorporates mixer technology used in a wide band, fixed-tuned SIS receiver developed for the Submillimeter Array of the Smithsonian Astrophysical Observatory. The mixer employs a Nb SIS tunnel junction that has a current density of about 7.5 kA/cm2 and is about 0.6 square microns in area. On-chip tuning is provided by a short inductor section followed by a microstrip transformer. Double sideband receiver noise temperatures, determined from experimental Y-factor measurements, are about 100 K across the majority of the desired operating frequency band. A single-sideband mixer, for operation at 460 and 490 GHz, has also been tested in the same receiver set-up. In this case, the receiver noise is about twice the double-sideband value.

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