skrf.calibration.calibration.TRL¶

class
skrf.calibration.calibration.
TRL
(measured, ideals=None, estimate_line=False, n_reflects=1, solve_reflect=True, *args, **kwargs)[source]¶ Thru Reflect Line
A Similar selfcalibration algorithm as developed by Engen and Hoer [1], more closely following into a more matrix form in [2].
Reference impedance of the calibration is characteristic impedance of the transmission lines. If the characteristic impedance is known, reference impedance can be renormalized using EightTerm.renormalize function.
See also
References
[1]  Engen and C. A. Hoer, “ThruReflectLine: An Improved Technique for Calibrating the Dual SixPort Automatic Network Analyzer,” IEEE Transactions on Microwave Theory and Techniques, vol. 27, no. 12, pp. 987993, 1979.
[2] H.J. Eul and B. Schiek, “A generalized theory and new calibration procedures for network analyzer selfcalibration,” IEEE Transactions on Microwave Theory and Techniques, vol. 39, no. 4, pp. 724731, 1991.
Attributes
T_matrices 
Intermediate matrices used for embedding and deembedding. 
biased_error 
Estimate of biased error for overdetermined calibration with multiple connections of each standard 
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 multiple connections of each standard.This is the combined effects of both biased and unbiased errors 
unbiased_error 
Estimate of unbiased error for overdetermined calibration with multiple connections of each standard 
verify_12term 

verify_12term_ntwk 
Methods
__init__ 
Initialize a TRL calibration 
apply_cal 
Apply correction to a Network 
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 
Runs the calibration algorithm. 
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() 