Planck-LFI 44 GHz back end module

被引：4

作者：

Aja, B

Pascual, JP

De LA Fuente, L

Detratti, M

Artal, E

Mediavilla, A

De Paco, P

Cara, LPI

机构：

[1] Univ Cantabria, ETSI Telecomunicac, Dept Ingn Comunicac, E-39005 Santander, Spain

[2] Autonomous Univ Barcelona, E-08193 Barcelona, Spain

[3] Univ Politecn Cataluna, E-08028 Barcelona, Spain

来源：

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS | 2005年 / 41卷 / 04期

关键词：

D O I：

10.1109/TAES.2005.1561893

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

This work describes the principle of operation, assembly and performance of one branch of the 44 GHz back end module (BEM) for the Planck low frequency instrument (LFI). This subsystem constitutes a fully representative branch of the qualification-model version (QM). It includes waveguide to microstrip transition, GaAs pseudomorphic high electron mobility transistor (PHENIT) low noise amplifiers (LNA), bandpass filter, square-law detector and dc amplifier. The fundamentals of the design of the RF part are described and all of the components have been tested individually before integration. Using single tone and wideband noise stimuli, the output voltage has been measured for several input powers, in order to obtain the sensitivity factor of the complete BEM. The effective bandwidth and the equivalent noise temperature have been calculated from the measurements, taking into account the frequency dependence on the noise source and the BEM. Finally the low frequency output power spectrum has been obtained and a maximum I If knee frequency around 200 Hz has been measured with a 3 dB output signal video bandwidth above 50 KHz.

引用

页码：1415 / 1430

页数：16

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