The terminal voltage and currents of a two-port network are indicated in the figure below. If the two-port network is reciprocal, then
1
Z12 = \(\frac{1}{\text{Y}_{22}}\)
2
h12 = −h21
3
\(\frac{\text{Z}_{12}}{\text{Y}_{12}}=\text{Z}_{12}^{2}−\text{Z}_{11} \text{Z}_{22}\)
4
AD − BC = 0