Jerry wrote:
The bottom, *if* I understand it correctly--is the voltage portion,
the top would be the current (RF) portion.

Nope, for a 1/4WL mobile antenna, the feedpoint is the
high current, low voltage point. The tip top is the
low current, high voltage point. The thing that tends
to bite us is the high voltage.

Consider that the top portion of a mobile antenna can
be a low-radiation top hat while the bottom of the
antenna (high current section) is radiating very well.
--
73, Cecil http://www.w5dxp.com