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History of Impedance Parameters I'd like to see some content about the historical development, and motivation behind their development, of impedance parameters, and also of the other various n-port parameters: S, Y, Z, H, T, etc, on their respective pages. My Other Head ( talk) 12:51, 2 August 2013 (UTC) reply

The expression for the scattering matrix given here is only true when the characteristic impedances are all real. In general, I believe it should be ${\displaystyle S=F\cdot (Z-z^{\ast })\cdot (Z+z)^{-1}\cdot F^{-1}}$, where ${\displaystyle F=\left(2{\sqrt {\Re [z]}}\right)^{-1}}$ ^[1]. Enthree ( talk) 03:51, 27 August 2020 (UTC) reply