skrf.qfactor.Qfactor.fitted_s
- Qfactor.fitted_s(opt_res=None, f=None)[source]
S-parameter response of an equivalent circuit model resonator.
The approximate solution and estimated is obtained from [MAT58]:
\[S = m_1 + j m_2 + \frac{m_3 + j m_4}{1 + j Q_L t}\]where the m coefficients come from the fitted solution and
\[t = \frac{f}{f_L} - \frac{f_L}{f} \approx 2 \frac{f − f_L}{f_L}\]- opt_resNone or
OptimizedResult. Default is None. Solution produced by the
fit()method. If None, uses the solution previously calculated, if performed.- fNone or np.ndarray. Default is None.
frequency array [Hz]. If None, use the self frequencies.
- snp.ndarray
S-parameter response.
[MAT58]“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 2.2, eqn. (21).
- opt_resNone or