On Sep 6, 8:09*pm, Richard Fry wrote:
On Sep 6, 7:38*pm, Art Unwin wrote: Equilibrium is when there is no gain. When this occurs there is
polarisation purity.

____________

So you say, Art.

Note that a useful and practical antenna with "no gain," i.e., an
isotropic radiator, does not exist in the real world.

So what good is your concept of "equilibrium?"

RF

Enough! You did not get on the stage with respect to the laws of Gauss
and Maxwell so I must assume you are shooting from the hip.It is not
to late to add to the static /dynamic boundary question assuming you
are an engineer of some sort. Other than that.....