Towards the Prediction of SpaceWire Radiated Emissions Employing an LVDS Signal Emulator

The majority of the past and current ESA’s, NASA’s, JAXA’s science missions utilize broadly SpaceWire (SpW) Links, with Low Voltage Differential Signaling (LVDS) for physical layer, to transfer mission data. Electromagnetic Compatibility (EMC) Interference (EMI) problems caused by harnesses’ radiated emissions remain a constant open issue in every due scientific payload sensitivity. A common cause from shielded cable bundles can be traced currents flowing on shield harness. This work aims present complete methodology predicting Electric field case an operating SpW link, while it expanded any which utilizes LVDS. protocol layer link are implemented via developed LVDS Signal emulator, handling both characteristics signals at outputs line drivers effects their transmission across along termination scheme, order calculate mode shield. then estimated considering ground material detailed harness topology, employing traveling wave antenna theory. validity this approach is assessed comparing predictions actual measurements. Simulation results good agreement measurements, rendering fast tactic pre-compliance procedure early design stage space mission.