Evaluation of closed-form crosstalk models of coupled transmission lines

Closed-form crosstalk models used for the estimation of near and far end crosstalk voltages between two parallel transmission lines are evaluated. The quantitative validity ranges, in terms of transmission line length and coupling strength, of the crosstalk models are presented. It is shown that the accuracy of the commonly used closed-form crosstalk models deteriorates as the increase of the coupling strength and the line length.