DocumentCode :
1495502
Title :
Dual channel 115 and 230 GHz SIS receivers in operation at the Owens Valley Radio Observatory
Author :
Woody, D.P. ; Giovanine, C.J. ; Miller, R.E.
Author_Institution :
Owens Valley Radio Obs., California Inst. of Technol., Big Pine, CA, USA
Volume :
25
Issue :
2
fYear :
1989
fDate :
3/1/1989 12:00:00 AM
Firstpage :
1366
Lastpage :
1370
Abstract :
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 μm2) 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
Keywords :
mixers (circuits); radio receivers; radiotelescopes; radiowave interferometers; solid-state microwave circuits; superconducting junction devices; 4.5 K; 85 to 300 GHz; EHF; MM-wave operation; Owens Valley Radio Observatory; PbInAu-native oxide-PbAu; SIS tunnel junctions; bridge lift-off technique; built-in RF choke; circular-to-rectangular waveguide transition; closed-cycle refrigerators; corrugated feed horn; dual-channel receivers; millimeter-wave interferometer array; mixers; radioastronomy; radiotelescope; reduced-height waveguide; superconductor-insulator-superconductor; Frequency; Josephson junctions; Millimeter wave technology; Observatories; Radio interferometry; Receivers; Superconducting device noise; Temperature distribution; Waveguide junctions; Waveguide transitions;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.92549
Filename :
92549
Link To Document :
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