We present the recently assembled flight models of the SIS mixer units (MU) for band 2 of the HIFI instrument for the Herschel satellite observatory. Design, device fabrication, most of the mixer hardware fabrication, space-qualification, and final assembly are all realized at KOSMA. Thanks to the modular design RF- and IF-performance of different parts of the MU are tested separately before final assembly. Latest test results show a noise temperature between 80 K in the band centre towards 220 K at the upper band edge at 2.8 K operating temperature. The mixer IF-ripple is below 2 dB over a 4-8 GHz bandwidth including the bias-T which provides a very high EMI and ESD protection. The mixer performance and design are discussed under the aspect of the careful trade off between performance, reliability, timely delivery, and resources.
SIS flight mixers for band 2 of the HIFI instrument of the Herschel Space Observatory
2004-01-01
171259 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
The Herschel HIFI Data Simulator
British Library Conference Proceedings | 2005
|Broadband NbTiN based SIS mixers for HIFI Band 2
IEEE | 2002
|Broadband NbTiN Based SIS Mixers for HIFI Band 2
British Library Conference Proceedings | 2002
|Herschel kijkt met HIFI superkoud het verst
Online Contents | 2009