Alan Peake wrote:
There is no standing wave on the antenna. The distribution patterns of
voltage and current on a half-wave dipole shown in antenna books, is not
a standing wave. They are the RMS values of voltage and current along
the dipole. At the centre, the ratio of Vrms to Irms is 50 ohms.

From "Antennas" by Kraus & Marhefka: "A sinusoidal current
distribution may be regarded as the standing wave produced
by two uniform traveling waves of equal amplitude moving in
opposite directions along the antenna."

From "Antenna Theory" by Balanis: "Because of the standing
wave pattern, it is also classified as a standing wave antenna"
"The sinusoidal current distribution of long open-ended linear
antennas is a standing wave constructed by two waves of equal
amplitude and 180 deg phase difference at the open-end traveling
in opposite directions along its length."

Of course, a 1/2WL dipole is a standing wave antenna.
--
73, Cecil http://www.w5dxp.com