Roy Lewallen wrote:
If you look at the transmission line
properties of a vertical, you see that the two conductors (the antenna
and ground plane) get farther and farther apart as the distance from the
feedpoint increases. This behaves like a transmission line whose
impedance increases with distance from the feedpoint and, in fact, a TDR
response shows just this characteristic.

So what? An ever increasing Z0 does not change the
basic characteristics of a standing wave antenna, one
characteristic of which is: The phase of the current
relative to the feedpoint current phase changes by
a minuscule amount. So exactly how did you use that
current to measure and calculate delay???

I've never seen an attempt at
simulating it with distributed resistance, ...

Then, just as I suspected, you have never looked at my
web pages. Radiation "loss" can easily be simulated by
resistance wire. Please download

http://www.w5dxp.com/stub_dip.EZ

and alleviate your ignorance.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com