Low noise SIS mixer with gain for 80-115 GHz

Details Low noise SIS mixer with gain for 80-115 GHz Low noise SIS mixer with gain for 80-115 GHz

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.260..255r&link_type=abstract

In ESA Proceedings of an ESA Workshop on a Spaceborne Submillimeter Astronomy Mission. A Cornerstone of the ESA Long Term Scienc

Astronomy and Astrophysics

Astronomy

2

Low Noise, Millimeter Waves, Mixing Circuits, Radio Telescopes, Sis (Superconductors), Superconductors, Extremely High Frequencies, Noise Temperature, Radio Filters

Scientific paper

Superconductor-insulator-superconductor quasiparticle mixers were designed and tested for the frequency range from 80 to 115 GHz. The sliding backshort is the only adjustable RF-tuning element. The RF-filter reactance is used as a fixed RF-matching element. A mixer which uses a single 2 sq micron Pb-alloy junction in a 1/4-height waveguide mount has a coupled conversion gain of GM(DSB) = 2.6 + or - 0.5 dB with an associated noise temperature of TM(DSB) = 16.4 + or - 1.8 K at the best DSB operation point. The receiver noise temperature TR(DSB) is 27.5 + or - 0.8 K. This mixer provides a SSB receiver noise temperature below 50 K over the frequency range from 91 to 96 GHz, the minimum being TR(SSB) = 44 + or - 4 K.

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