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

被引:30
作者
Aja, B [1 ]
Artal, E
de la Fuente, L
Pascual, JP
Mediavilla, A
Roddis, N
Kettle, D
Winder, WF
Cara, LPI
de Paco, P
机构
[1] Univ Cantabria, Dept Ingn Comun, Escuela Tecn Super Ingn Telecomun, E-39005 Santander, Spain
[2] Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England
[3] Univ Politecn Cataluna, Dept Teoria Senyal & Comun, Escola Tecn Super Engn Telecomun, ES-08034 Barcelona, Spain
关键词
Cosmic microwave background (CMB); cryogenic; low-noise amplifier (LNA); microwave radiometer; PLANCK low-frequency instrument (LFI);
D O I
10.1109/TMTT.2005.848815
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 in average noise temperature of 9.4 K.
引用
收藏
页码:2050 / 2062
页数:13
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