Very Low-Noise Differential Radiometer at 30 GHz for the PLANCK LFI

The PLANCK mission of the European Space Agency is devoted to produce sky maps of the cosmic microwave background radiation. The low-frequency instrument is a wide-band cryogenic microwave radiometer array operating at 30, 44, and 70 GHz. The design, test techniques, and performance of the complete...

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Bibliographic Details
Authors: Aja, Beatriz, Artal Latorre, Eduardo, Fuente, Luisa de la, Pascual, Juan Pablo, Mediavilla, Asier, Roddis, Neil, Kettle, Danielle, Winder, W. Frank, Pradell i Cara, Lluís|||0000-0003-4026-226X, Paco Sánchez, Pedro Antonio de
Format: article
Publication Date:2005
Country:España
Institution:Universitat Politècnica de Catalunya (UPC)
Repository:UPCommons. Portal del coneixement obert de la UPC
Language:English
OAI Identifier:oai:upcommons.upc.edu:2117/1047
Online Access:https://hdl.handle.net/2117/1047
Access Level:Open access
Keyword:Cryogenics
Microwave amplifiers
Microwave detectors
Radiometers
cryogenics
microwave amplifiers
microwave detectors
radiofrequency cosmic radiation
radiometers
Microones -- Amplificadors
Microones -- Detectors
Radiometria
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Circuits de microones, radiofreqüència i ones mil·limètriques
Description
Summary:The PLANCK mission of the European Space Agency is devoted to produce sky maps of the cosmic microwave background radiation. The low-frequency instrument is a wide-band cryogenic microwave radiometer array operating at 30, 44, and 70 GHz. The design, test techniques, and performance of the complete differential radiometer at 30 GHz are presented. This elegant breadboard 30-GHz radiometer is composed of a front-end module (FEM) assembled at the Jodrell Bank Observatory, Cheshire, U.K., and a back-end module assembled at the Universidad de Cantabria, Cantabria, Spain, and Telecomunicacio/spl acute/, Universitat Polite/spl acute/cnica de Catalunya, Barcelona, Spain. The system noise temperature was excellent, mainly due to the very low noise performance of the FEM amplifiers, which achieved an average noise temperature of 9.4 K.

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