Capacitance matrix
Capacitance
matrix: where
Inductance matrix:
where

The equations of coupled transmission lines are expressed in terms of inductance matrix and capacitance matrix:
The inductance matrix components are straightforwardly expressed as:
The capacitance matrix components C_{ij }are defined as electric charge on conductor(i) when only conductor(j) is held at 1V and the others are held at 0V:
Assuming that conductor1 is held at 1V and conductor2 is held at 0V, we obtain the C_{i1} (i=1,2):