Comments on “Stored Energies and Radiation Q”

The commented paper
[1]
claims to provide a new expression for an energy stored around a general radiator. The major purpose of this comment is to show that the claim is unjustified. Alongside with this issue, it is pointed out that some of the core formulas of
[1]
are not completely correct, and that their correct form has in fact been derived elsewhere, though for the purpose of evaluating the quality factor
$Q_{Z}$
and not the stored energies.