An experimental submillimetre heterodyne array receiver

Details An experimental submillimetre heterodyne array receiver An experimental submillimetre heterodyne array receiver

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ijimw...9..325m&link_type=abstract

International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 9, April 1988, p. 325-350.

Physics

Optics

4

Focal Plane Devices, Heterodyning, Infrared Telescopes, Radio Astronomy, Radio Receivers, Submillimeter Waves, Arrays, Cassegrain Optics, Klystrons, Mixing Circuits, Schottky Diodes, Sis (Semiconductors), Superheterodyne Receivers

Scientific paper

An experimental array receiver intended for radioastronomical observations of the J = 3-2 line of carbon monoxide is described. It consists of six indium antimonide mixers cooled to about 2K in a pumped helium cryostat, with rectangular feed horns arranged on a 3 x 2 grid at the f/9 focus of the UK Infrared Telescope. Each detector is mounted in a length of fundamental mode waveguide and has an independently tunable backshort. Local oscillator power is provided by a frequency tripler pumped by a klystron, and is coupled to the array via a 'lossless' quasi-optical coupler which is described in detail. The beam patterns and performance of the coupler have been measured and are in good agreement with theory.

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