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Dual channel 115 and 230 GHz SIS receivers in operation at the Owens Valley Radio Observatory

Woody, David and Giovanine, C. J. and Miller, R. E. (1989) Dual channel 115 and 230 GHz SIS receivers in operation at the Owens Valley Radio Observatory. IEEE Transactions on Magnetics, 25 (2). pp. 1366-1370. ISSN 0018-9464. doi:10.1109/20.92549.

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The Owens Valley Radio Observatory millimeter-wave interferometer array is presently operating with dual-channel SIS (superconductor-insulator-superconductor) tunnel junction receivers. The first channel covers the frequency range from 85 to 120 GHz and the second channel covers the frequency range from 200 to 300 GHz. The mixers consist of a corrugated feed horn, a single-stage circular-to-rectangular waveguide transition a reduced-height waveguide with an SIS junction mounted across the E-plane, and a non-contacting backshort. The mixer block has a built-in RF choke for the IF (intermediate frequency) signal path which is designed to present a short circuit to the junction at frequencies above the 2-GHz IF frequency. The small-area (<1 mu m/sup 2/) PbInAu-native oxide-PbAu SIS tunnel junctions are fabricated using a bridge lift-off technique. The receivers in the 85- to 120-GHz band have noise temperatures of <100 K, while the receivers in the 100- to 300-GHz band have noise temperatures in the range from 200 to 300 K. These dual-channel receivers are mounted in 4.5 K closed-cycle refrigerators and are in continuous use on the array.

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Additional Information:© 1989 IEEE. Manuscript received August 22, 1988. It is a pleasure to acknowledge the support of the staff of the Owens Valley Radio Observatory in the development and construction of the dual channel receivers described in this paper. The OVRO millimeter array is supported by NSF grant AST 87-14405.
Group:Owens Valley Radio Observatory (OVRO)
Funding AgencyGrant Number
NSFAST 87-14405
Issue or Number:2
Record Number:CaltechAUTHORS:20190219-114758437
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Official Citation:D. P. Woody, C. J. Giovanine and R. E. Miller, "Dual channel 115 and 230 GHz SIS receivers in operation at the Owens Valley Radio Observatory," in IEEE Transactions on Magnetics, vol. 25, no. 2, pp. 1366-1370, March 1989. doi: 10.1109/20.92549
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92977
Deposited By: Joy Painter
Deposited On:19 Feb 2019 22:28
Last Modified:16 Nov 2021 16:54

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