an online RF book -- checkout page 519

http://www.ece.rutgers.edu/~orfanidi/ewa/ch15.pdf

@

"Cecil Moore" wrote in message
...
jopl wrote: ???

In a standing wave antenna, like a dipole, the power wave hits
the end of the antenna and voltage and current are reflected.
The standing wave pattern on 1/2 of a dipole looks somewhat
like the standing wave pattern for a lossy 1/4WL open stub.
In the case of a traveling wave antenna, the power wave hits
a resistor with close to the same value as the Z0 of the
antenna and is dissipated in the resistor.

So, a traveling-wave antenna is essentially one without
reflections.
--
73, Cecil http://www.qsl.net/w5dxp