Simulation of Reflection Noise in Small Single-end Serpentine Delay Line in A Practical Server PCB

Far-end crosstalk is well known to contribute to the voltage drop in the TDR (time-domain reflection) waveform in a single-end serpentine delay line. However, for a small and practical single-end serpentine delay line in a practical Server PCB, both far-end crosstalk and corner-turn reflection contribute to the voltage drop in the TDR waveform, and corner-turn reflection is the greater contributor. This paper examines the effect of a 3D EM solver and circuit solver on the TDR waveform.