Physics – Optics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mijo...29..119p&link_type=abstract
Microwave Journal (ISSN 0026-2897), vol. 29, Oct. 1986, p. 119, 120, 122 (5 ff.). Research supported by the Institut National de
Physics
Optics
Cassegrain Optics, Cryogenic Cooling, Low Noise, Millimeter Waves, Radio Astronomy, Radio Receivers, Field Effect Transistors, Frequency Converters, Microprocessors, Mixing Circuits, Numerical Control, Schottky Diodes
Scientific paper
A new cooled mm-wave receiver is presented. This receiver has been in operation since October 1985 with a 2.5 m Cassegrain telescope located at the 'Plateau de Bure' in the French Alps. It is tunable from 210 to 240 GHz and has a DSB system noise temperature of 360 K and a 600 MHz instantaneous bandwidth. The receiver is composed of a local oscillator (klystron frequency tripler) and a Schottky diode mixer with a cooled FET amplifier. Quasi-optical techniques are used for signal injection. A computer-controlled microprocessor drives the whole system and performs calibration and frequency tuning of the receiver. The different parts of the receiver, frequency tripler, quasi-optical techniques, mixer, FET amplifier, and microprocessor, are described.
Beaudin Gerard
Deschamps Alexandra
Gheudin M.
Pagani Laurent
Ruffié Gilles
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