Title :
A 125-180 GHz fixed-tuned SIS mixer for radioastronomy
Author :
Karpov, A. ; Blondel, J ; Pasturel, P. ; Gundlach, K H
Author_Institution :
IRAM, 300 rue de la Piscine, F - 38406 St., Martin d´´Héres, France. Tel. (33)76 82 49 00, Fax (33)-76-51-59-38, E-mail: karpov@iram.fr
Abstract :
A fixed-tuned SIS mixer covering an instantaneous band of 45% around 150 GHz has been developed for radioastronomy. A new type of coplanar tuning circuit for the SIS junction is introduced. The minimum DSB receiver noise is 19 K, while the average noise is 25K in the 130-175 GHz range with a 1 GHz IF band. A speedup of the observations by a factor 2-3 is possible with the new receiver.
Keywords :
Atmosphere; Background noise; Circuit noise; Circuit optimization; Local oscillators; Radio astronomy; Receivers; Superconducting device noise; Telescopes; Temperature;
Conference_Titel :
Microwave Conference, 1996. 26th European
Conference_Location :
Prague, Czech Republic
DOI :
10.1109/EUMA.1996.337519
