quality factor of inductor

[Julian18]

definition quality factor of inductor

Hi,
after reading a lot of papers, I am totally confused by the definition of quality factor of inductor. That is , should we take the electric energy that is inevitably stored in a real inductor into the account? if so should that form of energy be added to or subtracted from the dominant magnetic energy stored in the inductor. If the former is the correct definition, we should get the same definition of Q of an inductor as that of a resonator, If the latter is correct, we get the commonly used formula Q = -Im(y11)/Re(y11).

Thanks.

Julian

 

[LvW]

My recommendation is not to complicate things.
There is a more general definition of a quality factor (NOT only applicable to inductors) based on physical parameters (energy).
However, for practical purposes it is sufficient to use the Q formula derived from this general definition - and that´s simply Im/Re (based on the vector in the complex plane).