We will now determine the coupling factor of the two coupled inductors.
To this end, we determine the Laplace transform of the voltage transfer from
the source "V1" to the voltage at node "out". We use numeric analysis and
substitute
The transfer function is a function of the coupling factor:
The squared magnitude of this transfer at the measurement frequency of this circuit is obtained as:
The measured value
Solving
Substitution of the value of
The figure below shows the magnitude plot. It should correspond with the one measured with the network analyser. If not, the values of the model parameters are incorrect, or the model is too simple and a more elaborated model should be used.
Go to Coupled-Coils-Simple_index
SLiCAP: Symbolic Linear Circuit Analysis Program, Version 1.6.0 © 2009-2024 SLiCAP development team
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Last project update: 2024-03-04 22:12:16