85-115-GHz receivers for radio astronomy

Astronomy and Astrophysics – Astronomy

Scientific paper

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Josephson Junctions, Millimeter Waves, Mixing Circuits, Radio Astronomy, Superconductors, Superheterodyne Receivers, Lead Alloys, Low Noise, Microwave Circuits, Noise Temperature, Sidebands, Signal Mixing, Volt-Ampere Characteristics

Scientific paper

Low-noise receivers for radio astronomy have been built using Pb alloy
superconducting tunnel junction mixers operating at 4.5 K. They have
been used for 85-115-GHz astronomy with double-sideband receiver noise
temperature between 70 and 200 K. Junction fabrication and receiver
construction, operation, and performance are described herein.

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