The terminal voltage and currents of a two-port network are indicated on the above figure. If the two-port is reciprocal, then
1
\(\frac{{{Z_{12}}}}{{{Y_{12}}}} = Z_{12}^2 - {Z_{11}} \cdot {Z_{22}}\)
2
\({Z_{12}} = \frac{1}{{{Y_{22}}}}\)
3
h12 = - h21
4
AD – BC = 0