skrf.calibration.calibration.SOLT

class skrf.calibration.calibration.SOLT(measured, ideals, n_thrus=1, *args, **kwargs)[source]

Short Open Load Thru, Full two-port calibration.

SOLT is the traditional, fully determined, two-port calibration originally developed in [1]. Although the acronym SOLT implies the use of 4 standards, skrf’s algorithm can accept any number of reflect standards, If more than 3 reflect standards are provided a least-squares solution is implemented for the one-port stage of the calibration.

If your thru is not flush you need to use TwelveTerm instead of SOLT.

Redundant flush thru measurements can also be used, through the n_thrus parameter. See __init__()

References

[1]
  1. Kruppa and K. F. Sodomsky, “An Explicit Solution for the Scattering Parameters of a Linear Two-Port Measured with an Imperfect Test Set (Correspondence),” IEEE Transactions on Microwave Theory and Techniques, vol. 19, no. 1, pp. 122-123, Jan. 1971.

See also

TwelveTerm

Attributes

biased_error Estimate of biased error for overdetermined calibration with
caled_ntwk_sets Returns a NetworkSet for each caled_ntwk, grouped by their names
caled_ntwks List of the corrected calibration standards
coefs Dictionary or error coefficients in form of numpy arrays
coefs_12term Dictionary of error coefficients for 12-term Model
coefs_12term_ntwks Dictionary or error coefficients in form of Network objects
coefs_3term Dictionary of error coefficients for One-port Error model
coefs_3term_ntwks Dictionary of error coefficients in form of Network objects
coefs_8term Dictionary of error coefficients for 8-term (Error-box) Model
coefs_8term_ntwks Dictionary of error coefficients in form of Network objects
coefs_ntwks Dictionary of error coefficients in form of Network objects
error_ntwk The calculated error Network or Network[s]
family
frequency Frequency object of the calibration
normalized_directivity the directivity normalized to the reflection tracking
nstandards number of ideal/measurement pairs in calibration
output_from_run Returns any output from the run().
residual_ntwk_sets Returns a NetworkSet for each residual_ntwk, grouped by their names
residual_ntwks Dictionary of residual Networks
total_error Estimate of total error for overdetermined calibration with
unbiased_error Estimate of unbiased error for overdetermined calibration with
verify_12term
verify_12term_ntwk

Methods

__init__ SOLT initializer
apply_cal
apply_cal_to_all_in_dir
apply_cal_to_list Apply correction to list of dict of Networks.
embed
from_coefs Creates a calibration from its error coefficients
from_coefs_ntwks Creates a calibration from its error coefficients
plot_caled_ntwks Plots corrected calibration standards
plot_errors Plots biased, unbiased and total error in dB scaled
plot_residuals Plot residual networks.
pop Remove and return tuple of (ideal, measured) at index.
remove_and_cal Remove a cal standard and correct it, returning correct and ideal
run
update_coefs update currect dict of error coefficients
write Write the Calibration to disk using write()