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1. Very low-noise differential radiometer at 30 GHz for the PLANCK LFI

Author

Aja, Beatriz, Artal, Eduardo, de la Fuente, Luisa, Pascual, Juan Pablo, Mediavilla, Angel, Roddis, Neil, Kettle, Danielle, Winder, W. Frank, Cara, Lluis Pradell i, and de Paco, Pedro

Subjects
Microwave devices -- Research, Radiometers -- Research, Business, Computers, Electronics, Electronics and electrical industries, European Space Agency
Abstract

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, Universitat Politecnica 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. Index Terms--Cosmic microwave background (CMB), cryogenic, low-noise amplifier (LNA), microwave radiometer, PLANCK low-frequency instrument (LFI).

Published
2005

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

Author

Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones, 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, Paco Sánchez, Pedro Antonio de, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones, 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, and Paco Sánchez, Pedro Antonio de

Abstract

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., Peer Reviewed

Published
2005

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