Title :
Quasiparticle Mixer Approaching Quantum Limited Sensitivity
Author :
Karpov, A. ; Blondel, J. ; Lazareff, B. ; Billon-Pierron, D. ; Gundlach, K.H.
Author_Institution :
INSTITUT DE RADIOASTRONOMIE MILLIMETRIQUE, 300, rue de la Piscine, Domaine Universitaire de Grenoble, St Martin d´´Here, 38406 France
Abstract :
The possibility to achieve quantum limited quasiparticle mixer sensitivity has been studied at 230 GHz. At this frequency important for ground base. radio astronomy we achieved the receiver noise temperature of about 32 K (DSB). The quasiparticle mixer noisq temperature was found to be near 5 K (DSB). This value is quite close to the quantum limit (0.5hv/k level) at 230 GHz.
Keywords :
Frequency; Land surface temperature; Local oscillators; Magnetic field measurement; Magnetic noise; Radio astronomy; Receivers; Superconducting device noise; Temperature sensors; Testing;
Conference_Titel :
Microwave Conference, 1994. 24th European
Conference_Location :
Cannes, France
DOI :
10.1109/EUMA.1994.337414
