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A quantum mixer at 350 GHz based on superconductor-insulator-superconductor (SIS) junctions.

Cornelia E. Honingh

Published Jan 1, 1993• 2 citations
OpenAlex

Related papers

QUANTUM-LIMITED BROADBAND MIXERS WITH SUPERCONDUCTING TUNNEL JUNCTIONS AT MILLIMETER AND SUBMILLIMETER WAVELENGTHS

史生才

•Jan 1, 1996•3 citations

Waveguide receiver design prototypes for the 211–275 GHz and 790–950 GHz frequency ranges

Kirill I. Rudakov, Pavel Dmitriev, Andrey M. Baryshev +4 more

Superconductor-insulator-superconductor (SIS) mixers are the most sensitive heterodyne receivers for mm and submm wavelengths. SIS mixers are installed on all state of the art submm observatories such as the Atacama Large Millimeter array (ALMA) and the Atacama Pathfinder Experiment (APEX). Recently, an improved type of Nb/AlN/NbN SIS junction has become available that combines higher gap voltage with high current density. This opens new parametric space for further improvement of the SIS mixer's performance and bandwidth both for frequencies higher and lower than the gap frequency of Nb (700 GHz). In this contribution we will describe designs of SIS mixers based on a new type of SIS junction, both for high (~900 GHz) and low (~200 GHz) frequencies.

URSI General Assembly and Scientific Symposium•Aug 1, 2017•0 citations

QUANTUM-LIMITED BROADBAND MIXERS WITH SUPERCONDUCTING TUNNEL JUNCTIONS AT MILLIMETER AND SUBMILLIMETER WAVELENGTHS

Zhenfeng Xi

•Sep 30, 1996•1 citation

A 100-GHz fixed-tuned waveguide SIS mixer exhibiting broad bandwidth and very low noise temperature

Sheng-Gai Shi, Takashi Noguchi, Junji Inatani

This paper presents design and performance data for a 100-GHz waveguide superconductor-insulator-superconductor (SIS) mixer, which is incorporated with a twin-junction device (i.e., two identical junctions connected in parallel through a tuning inductance) and a fixed-tuned broad-band waveguide mixer mount. The 100-GHz mixer is actually developed as a prototype of the 500-GHz one. The constructed 100-GHz SIS receiver results in an overall receiver noise temperature (DSB) of less than 40 K over the frequency range from 80-120 GHz, with a minimum value of just 20 K that is four times as large as the quantum limit (i.e., 4/spl planck//spl omega//k). Such a performance is comparable or even superior to those of the best mechanically tunable waveguide SIS receivers at the same frequency band. In addition, some interesting mixing behaviors related to this two-junction device are described in detail.

IEEE Transactions on Applied Superconductivity•Jan 1, 1997•22 citations

Progress on tunerless SIS mixers for the 200-300 GHz band

Anthony R. Kerr, S.-K. Pan, A. W. Lichtenberger +1 more

An integrated superconductor-insulator-superconductor (SIS) mixer for the 200-300-GHz band with no adjustable tuning is described. A waveguide input is coupled to a coplanar mixer circuit with six individually tuned SIS junctions in series. Using the best mixer, the receiver noise temperature is 45-80 K DSB over 215-275 GHz. The mixer noise temperature at 230 GHz is 12 K DSB, and the conversion loss is 2.5 dB DSB.>

IEEE Microwave and Guided Wave Letters•Nov 1, 1992•36 citations

QUANTUM-LIMITED BROADBAND MIXERS WITH SUPERCONDUCTING TUNNEL JUNCTIONS AT MILLIMETER AND SUBMILLIMETER WAVELENGTHS

史生才, セイサイ シ, Zhenfeng XI

•Sep 30, 1996•0 citations
Superconductor-insulator-superconductor (SIS) mixers are the most sensitive heterodyne receivers for mm and submm wavelengths. SIS mixers are installed on all state of the art submm observatories such as the Atacama Large Millimeter array (ALMA) and the Atacama Pathfinder Experiment (APEX). Recently, an improved type of Nb/AlN/NbN SIS junction has become available that combines higher gap voltage with high current density. This opens new parametric space for further improvement of the SIS mixer's performance and bandwidth both for frequencies higher and lower than the gap frequency of Nb (700 GHz). In this contribution we will describe designs of SIS mixers based on a new type of SIS junction, both for high (~900 GHz) and low (~200 GHz) frequencies.
This paper presents design and performance data for a 100-GHz waveguide superconductor-insulator-superconductor (SIS) mixer, which is incorporated with a twin-junction device (i.e., two identical junctions connected in parallel through a tuning inductance) and a fixed-tuned broad-band waveguide mixer mount. The 100-GHz mixer is actually developed as a prototype of the 500-GHz one. The constructed 100-GHz SIS receiver results in an overall receiver noise temperature (DSB) of less than 40 K over the frequency range from 80-120 GHz, with a minimum value of just 20 K that is four times as large as the quantum limit (i.e., 4/spl planck//spl omega//k). Such a performance is comparable or even superior to those of the best mechanically tunable waveguide SIS receivers at the same frequency band. In addition, some interesting mixing behaviors related to this two-junction device are described in detail.