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Stability factor *μ* of two-port network

`stabilitymu`

calculates the stability factors using the equations

$$\begin{array}{c}\mu =\frac{1-{\left|{S}_{11}\right|}^{2}}{\left|{S}_{22}-{S}_{11}^{*}\Delta \right|+\left|{S}_{21}{S}_{12}\right|}\\ \mu \prime =\frac{1-{\left|{S}_{22}\right|}^{2}}{\left|{S}_{11}-{S}_{22}^{*}\Delta \right|+\left|{S}_{21}{S}_{12}\right|}\end{array}$$

where:

*S*,_{11}*S*,_{12}*S*, and_{21}*S*are S-parameters, from the input argument_{22}`s_params`

.*Δ*is a vector whose members are the determinants of the*M*2-port S-parameter matrices:$$\Delta ={S}_{11}{S}_{22}-{S}_{12}{S}_{21}$$

*S**is the complex conjugate of the corresponding S-parameter.

The function performs these calculations element-wise for each of the *M*
S-parameter matrices in `s_params`

.

[1] Edwards, M.L., and J.H. Sinsky. “A
New Criterion for Linear 2-Port Stability Using a Single Geometrically Derived Parameter.”
*IEEE Transactions on Microwave Theory and Techniques 40*, no. 12
(December 1992): 2303–11. https://doi.org/10.1109/22.179894.