There is a need for increasing speed on external links and harmonics are often seen and are a challenge to master. Especially for products within the space industry where the requirements are narrower due to the harsh environment it needs to withstand. This thesis is investigating a potential leakage path around the interface from the board to harness through Spacewire connectors. This leakage is seen as radiated emission and the focus of this thesis is to see if there is a possibility to decrease these emissions by minimising the ground loop that is potentially causing these issues in the UHF- and S-band. In order to verify that the proposed solution a reverberation chamber was used to analyse the performance of the solution when a twisted cord attached to a ground plane and wrapped around the harness was used to minimise the dierence in potential between the interface of the board to harness. The results showed that the proposed solution was inconclusive, but another discovery was made, it was found that the radiated emissions seen in the S-band can be decreased signicantly by improving the contact between the connector and the frame. This could be done with a beryllium-copper gasket. A decrease could also be seen in the UHF-band but not as substantial as the S-band.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:ltu-79683 |
| Date | January 2020 |
| Creators | Vestin, Anna |
| Publisher | Luleå tekniska universitet, Institutionen för system- och rymdteknik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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