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The project covers the development, manufacturing and test of two types of Ka-band feed chains. The feed chains are assigned to work in a single feed per beam multi spot beam antenna. They are dual circularly polarized and combine Rx and Tx signals. One feed chain serves user and gateway applications, the other feed chain additionally provides RF sensing capability.
Current Ka-band multi spot beam antennas are using different feed chain designs for User, Gateway and RF sensing (RFS) applications. The varying positions and orientations of the RF I/F's of the different feed chains require a quite complex waveguide routing to connect the feed chains to the RF P/L I/F's at the spacecraft module. Beside the efforts in producing and accommodating these individual waveguide runs they simultaneously increase the complexity of the thermal design of the feed cluster assembly.
The objective of this development was to design, build and test an EM of each a generic feed chain for User and Gateway applications as well as a feed chain for RFS applications, all of them having standardised RF I/F's in a regular configuration and orientation. This will allow for the deployment of a simplified and modular waveguide run design, thus considerably reducing production or procurement cost and lead times and simplifying the thermal design of the feed cluster assembly.
Furthermore a novel mode filter concept in the common Tx/Rx section of the feed chain avoids the use of any waveguide filters or diplexers in the feed chain network, thus increasing the operational band width of the feed chains.
This Artes 5.2 project:
Continuation under a joined Artes34 project together with Astrium Ltd:
Finalisation in November 2011.