RF Toolbox™

stabilitymu - Calculate stability factor, mu, of 2-port network

Syntax

[mu,muprime] = stabilitymu(s_params)

Description

[mu,muprime] = stabilitymu(s_params) calculates and returns the stability factors and , of a 2-port network. The input s_params is a complex 2-by-2-by-m array, representing m 2-port S-parameters.

where

• S₁₁, S₁₂, S₂₁, and S₂₂ are vectors of S-parameters, taken from the input argument s_params.

• 

• is the complex conjugate of the designated S-parameter.

defines the minimum distance between the center of the unit Smith chart and the unstable region in the load plane (the load is considered port 2).

defines the minimum distance between the center of the unit Smith chart and the unstable region in the source plane (the source is considered port 1).

Having (or ) is necessary and sufficient for the 2-port linear network, described by the S-parameters, to be unconditionally stable.

References

Edwards, Marion Lee, and Jeffrey H. Sinsky, "A New Criterion for Linear 2-Port Stability Using a Single Geometrically Derived Parameter," IEEE Transactions on Microwave Theory and Techniques, Vol. 40, No. 12, pp. 2303-2311, December 1992.

See Also

stabilityk

t2s