skrf.calibration.calibrationAlgorithms.two_port

skrf.calibration.calibrationAlgorithms.two_port(measured, ideals, switch_terms=None)

Two port calibration based on the 8-term error model.

Takes two ordered lists of measured and ideal responses. Optionally, switch terms [R3] can be taken into account by passing a tuple containing the forward and reverse switch terms as 1-port Networks. This algorithm is based on the work in [R4] .

Parameters :

measured : list of 2-port Network objects

Raw measurements of the calibration standards. The order must align with the ideals parameter

ideals : list of 2-port Network objects

Predicted ideal response of the calibration standards. The order must align with ideals list measured: ordered list of measured networks. list elements

switch_terms : tuple of Network objects

The two measured switch terms in the order (forward, reverse). This is only applicable in two-port calibrations. See Roger Mark’s paper on switch terms [R3] for explanation of what they are.

Returns :

output : a dictionary

output information, contains the following keys: * ‘error coefficients’: * ‘error vector’: * ‘residuals’:

Notes

support for gathering switch terms on HP8510C is in skrf.virtualInstruments.vna

References

[R3]	(1, 2, 3) Marks, Roger B.; , “Formulations of the Basic Vector Network Analyzer Error Model including Switch-Terms,” ARFTG Conference Digest-Fall, 50th , vol.32, no., pp.115-126, Dec. 1997. URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4119948&isnumber=4119931

[R4]

(1, 2) Speciale, R.A.; , “A Generalization of the TSD Network-Analyzer Calibration Procedure, Covering n-Port Scattering-Parameter Measurements, Affected by Leakage Errors,” Microwave Theory and Techniques, IEEE Transactions on , vol.25, no.12, pp. 1100- 1115, Dec 1977. URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1129282&isnumber=25047