skrf.calibration.calibration.UnknownThru

class skrf.calibration.calibration.UnknownThru(measured, ideals, *args, **kwargs)[source]

Two-Port Self-Calibration allowing the thru standard to be unknown.

This algorithm was originally developed in [1], and is based on the 8-term error model (EightTerm). It allows the thru to be unknown, other than it must be reciprocal. This is useful when when a well-known thru is not realizable.

References

[1]
  1. Ferrero and U. Pisani, “Two-port network analyzer calibration using an unknown thru,” IEEE Microwave and Guided Wave Letters, vol. 2, no. 12, pp. 505-507, 1992.

Attributes

T_matrices Intermediate matrices used for embedding and de-embedding.
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
measured_unisolated
measured_unterminated
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__ 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
renormalize Renormalizes the calibration error boxes to a new reference impedance.
run
terminate Terminate a network with switch terms
unterminate Unterminates switch terms from a raw measurement.
update_coefs update currect dict of error coefficients
write Write the Calibration to disk using write()