If the scattering matrix $[\text{S}]$ of a two port network is
\[ [\text{S}]=\left[\begin{array}{cc}
0.2 \angle 0^{\circ} & 0.9 \angle 90^{\circ} \\
0.9 \angle 90^{\circ} & 0.1 \angle 90^{\circ}
\end{array}\right] \]
then the network is
- lossless and reciprocal
- lossless but not reciprocal
- not lossless but reciprocal
- neither lossless nor reciprocal