PAGE CONTENTS
Objectives
This project activity aims at developing a C-Band reconfigurable notch filter breadboard, suitable for Very Small Aperture Terminal (VSAT) applications. A review of reconfigurable notch filter concepts suitable for C-Band implementation will be carried out with emphasis on filter and tuning concepts offering high quality factor and low complexity. The activity will trade off and select at least one baseline concept for the reconfigurable notch filter and will produce a detailed design of a breadboard based on the selected baseline. Finally, a filter breadboard will be manufactured and tested.
Challenges
An electronically reconfigurable notch filter would be an optimal solution in the sub-6GHz interference mitigation toolkit. Agility in suppressing the 5G interference would be obtained real-time, depending on the varying interference conditions. This in turn would remove the need of filter customisation, switching networks and/or manual feed adjustments, thus simplifying the operation of VSATs. A fully automatic interference mitigation strategy could also be considered, where the notch filter is continuously adjusted electronically, while the interference is being monitored by a spectrum analyser.
System Architecture
The use of a tunable notch filter in front of the LNB input in C-band VSAT module can protect the satellite carriers within its passband and isolate unwanted carriers located out of the passband.
Plan
The entire work of the project is organized and divided into two technical parts.
In the first parts, the most promising technology concepts are planned to be tested at BB level, leading to the final design concept selection. In the second part, elegant BBs close to a final product have to be designed and subjected to an extensive environmental and RF test campaign.
Current Status
The project is in early stage.
BDR meeting of the project was in December 2023.
The next step of the research is the fabrication and test of the first breadboards.
