Cryogenically cooled K-band high electron mobility transistor receiver for radio astronomical observation

Details Cryogenically cooled K-band high electron mobility transistor receiver for radio astronomical observation Cryogenically cooled K-band high electron mobility transistor receiver for radio astronomical observation

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987rsci...58..379k&link_type=abstract

Review of Scientific Instruments (ISSN 0034-6748), vol. 58, March 1987, p. 379-382.

Astronomy and Astrophysics

Astronomy

9

Cryogenic Cooling, High Electron Mobility Transistors, Microwave Equipment, Radio Astronomy, Radio Receivers, Circuit Diagrams, Equivalent Circuits, Extremely High Frequencies, Low Noise, Noise Temperature, Superhigh Frequencies

Scientific paper

A K-band receiver using cooled high electron mobility transistor (HEMT) amplifiers was developed at the Nobeyama Radio Observatory. A remarkable reduction in receiver noise temperature, T(rec), was obtained when it was cooled down to cryogenic temperature. The lowest T(rec) of 75 K was obtained at 23.4 GHz. This low noise characteristic reveals that the cooled HEMT amplifier is promising as a sensitive receiver for radio astronomical observations.

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