The choke impedance is inductive at low frequencies. Loss in the
ferrite material is low.

But due to a lossy ferrite material at the higher frequencies the
equivalent circuit is the inductance in parallel with a high
resistance.

At sufficiently high frequencies the choke impedance is almost a pure
high resistance. Which chokes the current just as well as a high
inductive reactance.

This is all that's necessary to explain the operation of a choke
balun.

I can't imagine why you are all making such a fuss about it.
----
Reg.