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Abstract
This paper presents a waveform level simulation for 100Base-TX Ethernet for performance evaluation on spacecraft power buses. The article starts by explaining the motives behind using Ethernet technology on spacecrafts. Then, the functionality of 100Base-TX is explained. The main focus is the simulation environment which emulates the behaviour of the 100Base-TX signal and its performance analysis with different Signal-to-Noise ratios (SNR). A Spice environment was constructed to simulate Power over Ethernet topologies. The generated Ethernet signals were applied to the Spice model along with simulated DC-DC converter output. The resulting waveform is exported from the spice environment and analysed in MATLAB.
