Two applications of algebraic invariants to linear transmission networks
J. van Heuven, Tullio E. Rozzi · IEEE Transactions on Circuits and Systems · 1976
The application of algebraic invariants of linear multivaluen-ports is Investigated for the optimization of linear(2m + n)-ports transmission networks. As a concrete example the restrictions on the scattering matrix of a linear passive embedding are determined for optimum performance as a phase or amplitude modulator. A sensitivity invariant is presented, which leads to a relation between differential sensitivities and sensitivities for large parameter variations.