Stability and Power-Gain Invariants of Linear Twoports

@inproceedings{Rollett1962StabilityAP,
  title={Stability and Power-Gain Invariants of Linear Twoports},
  author={J. S. Rollett},
  year={1962}
}
It is shown that the stability of a linear twoport is invariant under arbitrary lossless terminations, under interchange of input and output, and under "immittance substitution," a transformation group involving the arbitrary interchanging of impedance and admittance formulations at both ports. The quantity k = \frac {2 Re (\gamma_{11}) Re (\gamma_{22}) - Re(\gamma_{12} \gamma_{21})} {|\gamme_{12} \gamma_{21}|} (where the \gamma may be any of the conventional immittance z, y, or hybrid h, g… CONTINUE READING

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