skrf.calibration.calibration.UnknownThru¶

class
skrf.calibration.calibration.
UnknownThru
(measured, ideals, *args, **kwargs)[source]¶ TwoPort SelfCalibration allowing the thru standard to be unknown.
This algorithm was originally developed in [1], and is based on the 8term error model (
EightTerm
). It allows the thru to be unknown, other than it must be reciprocal. This is useful when when a wellknown thru is not realizable.References
[1]  Ferrero and U. Pisani, “Twoport network analyzer calibration using an unknown thru,” IEEE Microwave and Guided Wave Letters, vol. 2, no. 12, pp. 505507, 1992.
Attributes
T_matrices 
Intermediate matrices used for embedding and deembedding. 
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 12term Model 
coefs_12term_ntwks 
Dictionary or error coefficients in form of Network objects 
coefs_3term 
Dictionary of error coefficients for Oneport Error model 
coefs_3term_ntwks 
Dictionary of error coefficients in form of Network objects 
coefs_8term 
Dictionary of error coefficients for 8term (Errorbox) 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() 