A space-qualified low-noise 22 GHz receiver with high phase stability for VLBI-measurements

Author

Piironen, P. ; Mallat, J. ; Raisanen, A. ; Jukkala, P.

Author_Institution

Radio Lab., Helsinki Univ. of Technol., Espoo, Finland

fYear

1994

fDate

23-27 May 1994

Firstpage

1089

Abstract

A space-qualified low-noise 22 GHz receiver for the international space-VLBI mission Radioastron has been constructed. The microwave electronics have been realized by using thermally matched microstrip structures. The most important properties of the receiver are phase stability, sensitivity and reliability. Phase stabilities of better than 0.13/spl deg/spl deg/C and 0.2/spl deg/spl deg/C for the receiver and the LNA units were measured, respectively. The measured receiver noise temperature with a cooled HEMT LNA is less than 100 K. The reliability requirement of 0.97 for a three year mission is also fulfilled.<>

Keywords

microstrip components; radio receivers; radioastronomical techniques; radiowave interferometry; 22 GHz; 3 year; Radioastron; VLBI-measurements; cooled HEMT LNA; international space mission; low-noise receiver; noise temperature; phase stability; reliability; sensitivity; thermally matched microstrip structures; HEMTs; Measurement units; Microstrip; Noise measurement; Phase measurement; Stability; Temperature measurement; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1994., IEEE MTT-S International

Conference_Location

San Diego, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-1778-5

Type

conf

DOI

10.1109/MWSYM.1994.335165

Filename

335165