A 492 GHZ QUASI-OPTICAL SIS RECEIVER FOR SUBMILLIMETER ASTRONOMY

Authors
ENGARGIOLA G ZMUIDZINAS J LO KY
Citation
G. Engargiola et al., A 492 GHZ QUASI-OPTICAL SIS RECEIVER FOR SUBMILLIMETER ASTRONOMY, Review of scientific instruments, 65(6), 1994, pp. 1833-1838
Citations number
12
Categorie Soggetti
Physics, Applied","Instument & Instrumentation
Journal title
Review of scientific instruments → ACNP
ISSN journal
00346748
Volume
65
Issue
6
Year of publication
1994
Pages
1833 - 1838
Database
ISI
SICI code
0034-6748(1994)65:6<1833:A4GQSR>2.0.ZU;2-Z
Abstract
A 492 GHz quasioptical superconductor-insulator-superconductor (SIS) h eterodyne receiver for submillimeter astronomy has been constructed wi th a double-sideband noise temperature of 170+/-25 K, where the system response is an average over a 600 MHz i.f. bandwidth centered at 1.5 GHz. The excellent sensitivity is achieved through use of a planar twi n-slot antenna feeding a pair of Nb-Al2O3-Nb junctions linked by an in ductance. A main beam of f/15 has been measured. The performance of th is receiver is comparable to that of the best 492 GHz waveguide receiv ers currently in operation.