Low-noise slot antenna SIS mixers
- 1 June 1995
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 5 (2), 3053-3056
- https://doi.org/10.1109/77.403236
Abstract
-We describe quasi-optical SIS mixers op- erating in the submillimeter band , GHz) which have very low noise, around 5 hu/kB for the double-sideband receiver noise temperature. The mix- ers use a twin-slot antenna, Nb/Al-Oxide/Nb tunnel junctions fabricated with optical lithography, a two- junction tuning circuit, and a silicon hyperhemispher- ical lens with a novel. antireflection coating to optimize the optical efficiency. We have flown a submillimeter receiver using these mixers on the Kuiper Airborne Observatory, and have detected a transition of Hzl'O at 745 GHz. This directly confirms that SIS junc- tions are capable of low-noise mixing abwe the gap frequency.Keywords
This publication has 18 references indexed in Scilit:
- A low-noise SIS receiver measured from 480 GHz to 650 GHz using Nb junctions with integrated RF tuning circuitsInternational Journal of Infrared and Millimeter Waves, 1994
- Two-junction tuning circuits for submillimeter SIS mixersIEEE Transactions on Microwave Theory and Techniques, 1994
- A lownoise 665 GHz SIS quasi-particle waveguide receiverInternational Journal of Infrared and Millimeter Waves, 1994
- Double-slot antennas on extended hemispherical and elliptical silicon dielectric lensesIEEE Transactions on Microwave Theory and Techniques, 1993
- Millimeter-wave and terahertz integrated circuit antennasProceedings of the IEEE, 1992
- Quasi-optical slot antenna SIS mixersIEEE Transactions on Microwave Theory and Techniques, 1992
- A fixed tuned broadband matching structure for submillimeter SIS receiversIEEE Transactions on Applied Superconductivity, 1992
- A broad-band low-noise SIS receiver for submillimeter astronomyIEEE Transactions on Microwave Theory and Techniques, 1988
- A low noise receiver for millimeter and submillimeter wavelengthsInternational Journal of Infrared and Millimeter Waves, 1985
- Imaging antenna arraysIEEE Transactions on Antennas and Propagation, 1982