Objective of the activity is to develop and validate an in-orbit reconfigurable, two-channel, high power demultiplexer providing bandwidth-to-beam allocation flexibility in high throughput satellites.
Targeted Improvements: Increase the capacity allocation flexibility in multi-beam satellite systems by enabling a ±50% bandwidth reallocation between pairs of downlink beams.
Description: In current multi-beam (Ka/Ku-band) systems a single travelling wave tube amplifier (TWTA) is shared between two or more beams in order to reduce the number of high power amplifiers embarked on the satellite. A de-multiplexer (DEMUX) is employed after the TWTA to separate the signals destined for each beam. In this architecture the bandwidth and centre frequency of the channel filters are fixed, which significantly limits possibilities for flexible resource allocation at payload level. An in-orbit reconfigurable DEMUX with tuneable channel bandwidth would offer the possibility to match the bandwidth allocated to each downlink beam to the associated traffic demand, thereby making more efficient use of the available spectral resources. Moreover future flexible payload may also benefit from this technology. In this activity a scaled engineering model of a high power demultiplexer with continuously reconfigurable bandwidth shall be designed, developed, manufactured and experimentally verified to validate all critical functions, including the RF performance and the tuning mechanisms.
Priority 2 activities will only be initiated on the explicit request of at least one delegation.