Roy Lewallen wrote:

...
377 ohms is the impedance of free space, which is the ratio of E to H
fields of a planar TEM wave. People keep looking for this value when
dealing with antenna impedances, apparently due to the common
misconception that antennas are "transformers" of some sort to "match"
the impedance of free space (an E/H ratio) to a transmitter impedance (a
V/I ratio).
...
Roy Lewallen, W7EL

I believe the "misconception" is that the E/H fields induced by the
injection of an electromagnetic signal into the media (ether) ARE the
properties of the ether; I don't believe they are.

Rather, these fields are only the effect of the affect ...

Regards,
JS