A 200-300 GHz single sideband SIS mixer for radio astronomy

Authors
Karpov, A Blondel, J Billon-Pierron, D Gundlach, KH
Citation
A. Karpov et al., A 200-300 GHz single sideband SIS mixer for radio astronomy, IEEE APPL S, 11(1), 2001, pp. 844-847
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
10518223 → ACNP
Volume
11
Issue
1
Year of publication
2001
Part
1
Pages
844 - 847
Database
ISI
SICI code
1051-8223(200103)11:1<844:A2GSSS>2.0.ZU;2-9
Abstract
We present an ultra broadband low noise single sideband (SSB) SIS mixer dev eloped for 200-300 GHz radio astronomy receivers. The mixer uses two Nb/AlO x/Nb junctions. Image band rejection by 20 dB is provided in the entire 200 -300 GHz band using a mechanical tuning of the single noncontacting backsho rt in the mixer. The SIS receiver SSB noise temperature is close to 50 K in the main part of the band. A speed-up of the observations at radio telesco pes by a factor 2-3 is expected with the new receiver.