Autor:	J. Blondel, K. H. Gundlach, D. Billon-Pierron, M. Carter, Alexandre Karpov
Rok vydání:	1998
Předmět:	Physics Radiation Radio receiver design business.industry Local oscillator Schottky diode Condensed Matter Physics Vector processor Radio telescope Optics Cardinal point Power dividers and directional couplers Electrical and Electronic Engineering business Instrumentation Radio astronomy
Zdroj:	International Journal of Infrared and Millimeter Waves. 19:1175-1190
ISSN:	0195-9271
DOI:	10.1023/a:1022668625233
Popis:	The integration of many receiver units into a receiver array is a common method of improvement of imaging systems. This approach, well known in the mm band for Schottky mixer arrays, has not so far been developed for Superconductor - Insulator - Superconductor (SIS) junction mixers, which give the best sensitivity in the short mm wave range and in the submm range. We demonstrate for the first time a practical low noise multibeam receiver module using SIS mixer technology. The basis for the integration of several SIS mixers with a common local oscillator source is given by the saturation of the SIS receiver noise dependence upon local oscillator power. The module comprises three identical SIS mixers integrated with a common local oscillator, coupled through a three branch waveguide directional coupler. The multibeam module has been developed for a focal plane array receiver of the 30 meter radio telescope of the Institut de Radioastronomie Millimetrique (IRAM).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1989871b15cca9ef1d5d55ae6c7c4975 https://doi.org/10.1023/a:1022668625233 Zobrazit plný text záznamu Full text from SpringerLink