Modelizacion y utilizacion de spd para sintesis de muy bajo ruido banda L

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Title:	Modelizacion y utilizacion de spd para sintesis de muy bajo ruido banda L
Author:	Rocadenbosch Burillo, Francisco; Bará Temes, Francisco Javier; Comerón Tejero, Adolfo
Other authors:	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
Abstract:	A state of the art low noise cryogenic amplifier for L-band radio astronomy applications is presented. It was implemented in hybrid MIC technology using commercially available chip HEMT transistors. The average noise temperature in the band (1.2-1.8 GHz) is 4.5 K (0.06 dB N.F.) and the minimum is 4 K. The gain is more than 35 dB over the band and good input reflection and stability is achieved. The amplifier is cooled at 15 K using a closed cycle helium refrigerator. The special measuring technique used for accurate cryogenic characterization is briefly described.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Electronic circuits -Circuits electrònics
Rights:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Conference Object
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