Cross Talk

Cross Talk: Interference between signal lines
Z0=[(R+jwL)/(G+jwC)]^(1/2)
At high frequencies, capacitive reactance increases, it leads to reduced Z0
As the length of transmission line increases, it leads to increased inductive reactance, consequently reduced Z0.
If the line impedance is low, the series impedance as seen by the induced voltage is low, allowing large induced currents to flow. Thus crosstalk is generated from both capacitive and inductive coupling between signal lines