REALIZATION AND PRELIMINARY MEASUREMENTS ON A 94 GHZ SIS MIXER
Abstract
In this work we present preliminary results concerning the characterization, in terms of noise temperature, of a 94 GHz prototype receiver based on a superconductive SIS mixer developed at INRIM for the MASTER experiment. It is a tryple receiver for the 94, 225 and 345 GHz bands for astrophysical observations based on SIS Josephson junctions.
A promising noise figure of 110 K (about 22 times the quantum limit) has been obtained and contribute in fixing an upper bound to the final overall receiver noise temperature that is compliant with the experiment requirements. Moreover it is not far from the actual state of the art in the field.
The realization of the device is also described with attention to the optimization of crucial features along with a DC characterization of its Josephson junctions. Finally, we have demonstrated the INRIM ability to design and realize SIS mixers usable for practical radioastronomical applications.
Event details
- Event
- Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
- Technical Committee
- TC4
- Place
- Florence, ITALY
- Time
- 22 September 2008 - 24 September 2008
- Website
- http://www.imeko2008.org/