ISSTT Proceedings

ISSTT Proceedings

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A Fixed Tuned SIS Receiver for the 450 GHz Frequency Band

Authors:
R. Blundell, C.-Y.E. Tong, J.W. Barrett, J. Kawamura, R.L. Leombruno, S. Paine, D.C. Papa, X. Zhang, J.A. Stern, H.G. LeDuc, B. Bumble
Abstract:
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 µm² 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.
Categories:
SIS Receivers
Year:
1995
Session:
2
Full-text:
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Page Number(s):
123-133