Cecil begs to differ:

The electrical properties *can* change and that's the whole point. The
electrical properties of a 50+j0 dummy load and a 50+j0 antenna are
almost completely different.


Like what, as far as the source and feedline are concerned?
Ain't that basically "AC" RF power being produced by the TX, flowing through
the transmission line, to 50+j0? (Resistance/impedance)
Who gives the hoot if that 50+j0 is power eating resistor or power barfing
antenna. Call it virtual(y) non-radiating antenna or virtual(y) radiating
resistor. Simply transducers looking pretty to the feedline and doing their
assigned thing. F the SWR, matchit !
RIP

BUm