skrf.qfactor.Qfactor.Q_circle
- Qfactor.Q_circle(opt_res=None, A=None)[source]
Q-circle diameter.
The diameter of the Q-circle (as displayed in a VNA) provides a visual indication of whether the coupling is strong or weak [MAT58].
- opt_resNone or
OptimizedResult. Default is None. Solution produced by the
fit()method. If None, uses the solution previously calculated, if performed.- ANone of float. Default is None.
Scaling factor as defined in MAT 58 [MAT58]. For reflection resonance type, can be set as None to use the magnitude of the fitted detuned reflection coefficient S_V
- diamfloat
Q-circle diameter d.
- S_Vcomplex
Off-resonance Reflection Coefficient.
- S_Tcomplex
Tuned Reflection Coefficient.
[MAT58] (1,2)“Q-factor Measurement by using a Vector Network Analyser”, A. P. Gregory, National Physical Laboratory Report MAT 58 (2021) https://eprintspublications.npl.co.uk/9304/, section 2.5, eqn. (31).
- opt_resNone or