Title :
A 230GHz Low Noise Cooled Receiver for Radioastronomy Applications
Author :
Pagani, L. ; Beaudin, G. ; Gheudin, M. ; Deschamp, A. ; Encrenaz, P.
Author_Institution :
Observatoire de Meudon, Dept of Millimetric radioastronomy, 5 place Janssen, 92195 Weudon Principal Cedex - Frnace-; Laboratoire de Physique de L´´Ecole Normale Superieure 24, Rue Lhomond 75005 Paris
Abstract :
A new radioastronomical cooled receiver is presented here. It works in the range 210-240 GHz with a DSB system noise of 560 < presently and a 600 MHz instantaneous bandwidth. It contains a local oscillator (klystron + varactor tripler), a Schottky diode mixer with a cooled FET amplifier and uses quasi-optical techniques for signal injection. A microprocessor drives the whole system and is linked to a computer. The microprocessor allows self-calibration and frequency tuning. Details are given on the quasi-optical techniques, the frequency tripler, the mixer and the microprocessor.
Keywords :
Bandwidth; Drives; FETs; Frequency; Klystrons; Local oscillators; Microprocessors; Radiofrequency amplifiers; Schottky diodes; Varactors;
Conference_Titel :
Microwave Conference, 1985. 15th European
Conference_Location :
Paris, France
DOI :
10.1109/EUMA.1985.333495
