An 8.4-GHz cryogenically cooled HEMT amplifier for DSS 13

Details An 8.4-GHz cryogenically cooled HEMT amplifier for DSS 13 An 8.4-GHz cryogenically cooled HEMT amplifier for DSS 13

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988tdar.nasa..163t&link_type=abstract

In its The Telecommunications and Data Acquisition Report p 163-169 (SEE N89-10186 01-32)

Astronomy and Astrophysics

Astronomy

Cryogenic Cooling, Deep Space Network, High Electron Mobility Transistors, Receivers, Refrigerators, Transistor Amplifiers, Antenna Feeds, Low Noise, Noise Temperature, Radio Astronomy, Space Communication

Scientific paper

A prototype 8.4 GHz (X-band) high electron mobility transistor (HEMT) amplifier/closed cycle refrigerator system was installed in the Deep Space Station 13 feedcone in August 1987. The amplifier is cryogenically cooled to a physical temperature of 12 K and provides 31 K antenna noise temperature (zenith) and 35 dB of gain at a frequency of 8.2 to 8.6 GHz. Antenna system noise temperature is less than 50 K from 7.2 to 9.4 MHz. The low noise HEMT amplifier system is intended for use as a radio astronomy or space communications receiver front end.

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