230-GHz cosmic receiver - Keeping down the noise

Details 230-GHz cosmic receiver - Keeping down the noise 230-GHz cosmic receiver - Keeping down the noise

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986micwa..25...91b&link_type=abstract

Microwaves & RF (ISSN 0745-2993), vol. 25, Sept. 1986, p. 91-93, 108.

Astronomy and Astrophysics

Astronomy

1

Cryogenic Cooling, Gallium Arsenides, Mach-Zehnder Interferometers, Millimeter Waves, Radio Astronomy, Schottky Diodes, Cosmic Noise, Microwave Antennas, Noise Temperature, Radio Receivers, Random Noise

Scientific paper

A radio-astronomy receiver, designed to detect low-power, high-millimeter-wave signals and to minimize internally generated noise is described. The receiver antenna, installed at the focus of a 2.5-m telescope in the Alps at a 2550-m altitude, is used to detect the radio molecular lines at 230 GHz that result from the J-2-1 rotational oscillation in the CO molecule. The receiver system uses a quasi-optical diflexer based on the Mach-Zehnder interferometer, a cryogenically cooled mixer/amplifier, and a Schottky diode frequency multiplier, with the entire system controlled by a microprocessor.

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