A Cryogenic Microwave Measuring System for Satellite Receiver Testing

Author

Sjöman, P. ; Hughes, N.J. ; Jukkala, P. ; Ovaska, S. ; Tuovinen, J. ; Kangaslahti, P. ; Eskelinen, P.

Author_Institution

Helsinki University of Technology, Mets?hovi Radio Research Station, Mets?hovintie 114, 02540 KYLM?L?, FINLAND; Ylinen Electronics Ltd., FINLAND. Email: psj@kurp.hut.fi

fYear

2003

fDate

Oct. 2003

Firstpage

81

Lastpage

83

Abstract

A cryogenic microwave test system for the 70 GHz Planck satellite receiver has been built. It consists of 4 K and 20 K active helium coolers mounted in large 2Ã— 10Â¿7 mbar vacuum chamber. Special RF-components have been designed for the tests, e.g. a 4 K load for the continuous comparator reference temperature stimulus. External electronics has been constructed to measure the two orthogonal polarizations from two parallel receiver units. The noise temperature measurement uncertainty is better than 4 K and the test system´s post-detection noise characteristics with a matched load is better than 1.6.10Â¿6 V/Â¿Hz from 15 mHz, when the integration time constant is 0.5 s.

Keywords

Cryogenics; Electronic equipment testing; Microwave measurements; Microwave technology; Polarization; Receivers; Satellite broadcasting; System testing; Temperature measurement; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2003 33rd European

Conference_Location

Munich, Germany

Print_ISBN

1-58053-834-7

Type

conf

DOI

10.1109/EUMA.2003.340895

Filename

4142959