ISSTT Proceedings

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Fixed-tuned waveguide 0.6 THz SIS Mixer with Wide band IF

Authors:
A. Baryshev, E. Lauria, R. Hesper, T. Zijlstra, W. Wild
Abstract:
The Atacama Large Millimeter Array (ALMA) requires low noise SIS receivers for frequencies from about 80 GHz to 950 GHz with a very large IF banwidth (8 GHz SSB upper or lower sideband). Since there will be a larger number of antennas in the array (currently 64), additional requirements such as high reliability, low cost, and the production of a relatively large number of mixers have to be addressed. In this paper we report the results of a waveguide mixer with a fixed backshort for ALMA band 9 (602 - 720 GHz). The mizer is based on standard Nb/AlOx/Nb SIS junction technology. This mixer was tested with a wide band IF amplifier with and without isolator. Mixer measurement results for different LO frequencies across a wide IF band (4-8 GHz) will be presented. DSB Receiver noise across the both RF and IF band was measured, and receiver noise as low as 136 K at 650 GHz was demonstrated over the wideband IF. Finally, the possibility of a small production series of such a mixer is discussed with results of a first batch of mixer-blocks will be presented.
Categories:
SIS
Year:
2002
Session:
1
Full-text:
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Page Number(s):
1-10