Broken-step Phenomenon in SIS Mixers
Paper in proceedings, 2016
In this paper, we discuss a “broken step” phenomenon
in an SIS mixer. This phenomena was observed in the production version of the SIS mixers, designed for the 159-211 GHz RF band,being used for the construction of the ALMA Band 5 receiver The broken step typically appears at LO frequencies above 180 GHz and manifests itself as a sharp onset in the DC current at the middle of the quasiparticle step. Correspondingly, this affects the mixer IF response in a way that is similar to the Josephson step but is however of a different nature. Such behaviour affects the SIS mixer dynamic range and complicates the tuning of the 2SB mixer to optimize its performance, for both the receiver noise as well as the sideband rejection. In this paper, we describe results of a few experiments which were performed to understand this undesirable phenomenon.
Author
Andrey Ermakov
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Victor Belitsky
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Parisa Yadranjee Aghdam
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Vincent Desmaris
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Sven-Erik Ferm
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Mathias Fredrixon
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Sascha Krause
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Igor Lapkin
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Denis Meledin
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Alexey Pavolotskiy
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Hawal Marouf Rashid
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Sareh Shafiee
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Magnus Strandberg
Chalmers, Earth and Space Sciences, Advanced Receiver Development
Erik Sundin
Chalmers, Earth and Space Sciences, Advanced Receiver Development
kamaljeet saini
National Radio Astronomy Observatory
E bryerton
National Radio Astronomy Observatory
27th International Symposium on Space Terahertz Technology, ISSTT 2016, Nanjing, China
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Materials Engineering
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Electrical Engineering, Electronic Engineering, Information Engineering
Nano Technology
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Onsala Space Observatory
Nanofabrication Laboratory