| "Roy Lewallen"
| wrote in message ...
| [...]
| The Z of an
| infinite length antenna is indicated by locating the centers of the
| circles and noting that the center converges.
| [...]
| Roy Lewallen, W7EL


If we discuss here
the impedance referenced to the input (base) current
- and not to the maximum one - then
IMHO:

The quoted text above does not prove convergence.

The convergence must be independent
of the way the length goes to infinity.

The centers of whatever circles
may converge to a finite complex number
but their radii have to simultaneously converge to zero,
to have convergence.

But the limit for Z exists
if and only if
both the limits for R and X exist.
Therefore if the limit for R is dependent
on the way the length goes to infinity
then its limit does not exist.

A guess for either a non-existent limit for R
or an infinite one comes out from:
http://antennas.ee.duth.gr/ftp/visua...s/fu010100.zip
[850 KB]
If either of the above is true for R
then the corresponding is true for Z:

The limit for Z does not exist
or is (in general) the complex infinity.

But always and only for the
the impedance referenced to the input (base) current.

Sincerely,

pezSV7BAXdag