Szczepan Bia³ek wrote:
Everybody know that at the end of an antenna
the high voltage appears. It means that density of electrons change. The
movements must be bigger.

Actually, the fact that they try to bunch up at the ends
of a standing wave antenna during part of the cycle implies
that they slow to a stop thus repelling other electrons and
have nowhere else to go except to reverse direction during
the next 1/2 cycle.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com