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The objective of this predevelopment activity is:
Focus is given on passive thermal control devices but the active cooling means will also be investigated.
Alphabus missions include payloads with very stringent G/T requirements. Considering the antenna gain and noise temperature, one way to comply with this requirement is to minimise the input section temperature by:
The expected benefits from this study are to provide to the Alphabus programme:
* Cooled LNAs have been identified as necessary for several Alphabus missions involving Ka-band payloads oriented towards broadband multimedia applications (coverage sampled with users spots and gateways).
The tasks performed under the project are organised as follows:
The general passive and active concepts have been established and the trade-off between them is finalised. Several concepts have been studied for the passive solution with several sun-shield shapes. The selected solution will be further studied in detail for two different payload configurations.