A coupling model for a pair of skewed transmission lines

A coupling model in the form of an equivalent circuit is developed for a pair of skewed transmission lines. The inductive coupling is evaluated in closed form and the capitances are obtained from the solution of a pair of coupled integral equations for the excess-charge distributions along the transmission lines. The coupled integral equations for the excess charges are solved by an approximate analytical method and also by employing the method of moments. The two solutions are seen to be in excelent agreement. The excess-charge distributions are then used in a parametric study of the capacitances in the coupling model. The results are presented in graphical form.