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Low-noise 0.8-0.96- and 0.96-1.12-THz superconductor-insulator-superconductor mixers for the Herschel Space Observatory

Low-noise 0.8-0.96- and 0.96-1.12-THz superconductor-insulator-superconductor mixers for the Herschel Space Observatory

Authors :
Jackson, Brian D.
de Lange, Gert
Zijlstra, Tony
Kroug, Matthias
Kooi, Jacob W.
Stern, Jeffrey A.
Klapwijk, Teun M.
Jackson, Brian D.
de Lange, Gert
Zijlstra, Tony
Kroug, Matthias
Kooi, Jacob W.
Stern, Jeffrey A.
Klapwijk, Teun M.
Publication Year :
2006

Abstract

Heterodyne mixers incorporating Nb SIS junctions and NbTiN-SiO/sub 2/-Al microstrip tuning circuits offer the lowest reported receiver noise temperatures to date in the 0.8-0.96- and 0.96-1.12-THz frequency bands. In particular, improvements in the quality of the NbTiN ground plane of the SIS devices' on-chip microstrip tuning circuits have yielded significant improvements in the sensitivity of the 0.96-1.12-THz mixers relative to previously presented results. Additionally, an optimized RF design incorporating a reduced-height waveguide and suspended stripline RF choke filter offers significantly larger operating bandwidths than were obtained with mixers that incorporated full-height waveguides near 1 THz. Finally, the impact of junction current density and quality on the performance of the 0.8-0.96-THz mixers is discussed and compared with measured mixer sensitivities, as are the relative sensitivities of the 0.8-0.96- and 0.96-1.12-THz mixers.

Details

Database :
OAIster
Notes :
application/pdf, Low-noise 0.8-0.96- and 0.96-1.12-THz superconductor-insulator-superconductor mixers for the Herschel Space Observatory, English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1002705257
Document Type :
Electronic Resource