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SIS-mixer development at SRON

J. Mees

Since several years waveguide and planar antenna SIS-mixers for space applications are developed at SRON in orderof ESA. Recent results show excellent mixer performance up to frequencies above the superconducting gap of Nb.Goal is the development of a 1THz-mixer. Best results show a receiver noise temperature of Taw=400K at 720GHz incase of the waveguide mixer and T„„=200K at 490GHz for the double dipole planar antenna mixer. We will presentthe status in the development of SIS-junctions, integrated tuning network, mixers and mounts.Since several years waveguide and planar antenna SIS-mixers for space applications are developed at SRON in orderof ESA. Recent results show excellent mixer performance up to frequencies above the superconducting gap of Nb.Goal is the development of a 1THz-mixer. Best results show a receiver noise temperature of Taw=400K at 720GHz incase of the waveguide mixer and T„„=200K at 490GHz for the double dipole planar antenna mixer. We will presentthe status in the development of SIS-junctions, integrated tuning network, mixers and mounts.

International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)Aug 30, 19930 citations

Simulated performance and model measurements of an SIS waveguide mixer using integrated tuning structures

Karl Jacobs, U. Kotthaus, Bernd Vowinkel

International Journal of Infrared and Millimeter WavesJan 1, 199214 citations

Low noise SIS receiver performance using Pb alloy tunnel junctions

Steven R. Davies, Leslie T. Little

A receiver noise temperature of 61 K (DSB) has been measured for a superconductor–insulator–superconductor (SIS) heterodyne receiver operating at 232 GHz, the lowest value reported to date for such a receiver employing a lead alloy junction. Analysis of the losses of the receiver components yields mixer noise temperature and conversion loss, Tm = 24 K and Lm = 2.1 dB (DSB). These are compared with predictions based on 3-port quantum mixer theory, made using the measured characteristics of the junction and an equivalent circuit for the waveguide mixer mount deduced from scaled modelling experiments.A receiver noise temperature of 61 K (DSB) has been measured for a superconductor–insulator–superconductor (SIS) heterodyne receiver operating at 232 GHz, the lowest value reported to date for such a receiver employing a lead alloy junction. Analysis of the losses of the receiver components yields mixer noise temperature and conversion loss, Tm = 24 K and Lm = 2.1 dB (DSB). These are compared with predictions based on 3-port quantum mixer theory, made using the measured characteristics of the junction and an equivalent circuit for the waveguide mixer mount deduced from scaled modelling experiments.

IEE Proceedings - Microwaves Antennas and PropagationJan 1, 19980 citations

A scale mixer model for sis waveguide receivers

Thomas H. B�ttgenbach, T. D. Groesbeck, B. N. Ellison

International Journal of Infrared and Millimeter WavesJan 1, 199012 citations

Heterodyne mixing experiments with NbN-based SIS junctions

Christine Letrou, Denis Crété, J. C. Pernot +2 more

International Journal of Infrared and Millimeter WavesApr 1, 19871 citation

Millimeter wave superconducting receivers

Qing Hu, C. A. Mears, P. L. Richards

Recent work done at Berkeley on the development of millimeter-wave heterodyne mixers using superconductor-insulator-superconductor (SIS) junctions is reviewed. Two types of mixers have been developed; a conventional waveguide system using a resonant cavity and an open-structure quasioptical system using planar antennas and lenses. Using the waveguide system, the lowest mixer noise level yet obtained (within 25% of the quantum limit) at 95 GHz has been achieved. The quasioptical system has achieved a good mixer performance up to 200 GHz, and it has shown promise for use at submillimeter wavelengths.>Recent work done at Berkeley on the development of millimeter-wave heterodyne mixers using superconductor-insulator-superconductor (SIS) junctions is reviewed. Two types of mixers have been developed; a conventional waveguide system using a resonant cavity and an open-structure quasioptical system using planar antennas and lenses. Using the waveguide system, the lowest mixer noise level yet obtained (within 25% of the quantum limit) at 95 GHz has been achieved. The quasioptical system has achieved a good mixer performance up to 200 GHz, and it has shown promise for use at submillimeter wavelengths.>

IEEE MTT-S International Microwave Symposium digestDec 9, 20020 citations

Simulated performance of SIS and SIN junctions as heterodyne receivers in waveguide and open antenna mixer mounts

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Simulated performance of SIS and SIN junctions as heterodyne receivers in waveguide and open antenna mixer mounts

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