Low-noise 460 GHz waveguide Schottky mixer radiometer for radioastronomy

Details Low-noise 460 GHz waveguide Schottky mixer radiometer for radioastronomy Low-noise 460 GHz waveguide Schottky mixer radiometer for radioastronomy

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ell....22..353k&link_type=abstract

Electronics Letters (ISSN 0013-5194), vol. 22, March 27, 1986, p. 353-355.

Astronomy and Astrophysics

Astronomy

8

Low Noise, Mixing Circuits, Radio Astronomy, Radiometers, Schottky Diodes, Waveguides, Antenna Radiation Patterns, Diplexers, Horn Antennas, Noise Temperature, Preamplifiers

Scientific paper

Measurements on a cryogenically cooled Schottky barrier diode mixer system at 460 GHz are reported. The mixer and horn are electroformed in a single block, and the carcinotron local oscillator is coupled in through a polarization diplexer. A double-sideband system noise temperature of 870 K was obtained at midband at 12 K ambient. The total RF/IF double-sideband conversion loss was 9.0 dB, measured at 295 K ambient.

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