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

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

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 rel...

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Bibliographische Detailangaben
Hauptverfasser: Piironen, P., Mallat, J., Raisanen, A., Jukkala, P.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
HEMTs
Measurement units
Microstrip
Noise measurement
Phase measurement
Stability
Temperature measurement
Temperature sensors
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Beschreibung
Zusammenfassung: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.< >
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.1994.335165