Jim Kelley wrote:

Cecil Moore wrote:
Nope, but half the time in a horizontal standing wave antenna, the
forward current is flowing toward the left while the reflected current
is flowing toward the right, and vice versa. That's simply a characteristic
of RF current.

The point is it's not a reversal in phase, abrupt or otherwise. A
reversal in polarity, maybe. And you can't try to argue that polarity
and phase mean the same thing.

There are only two directions possible for real current in a wire so
real polarity and real phase indeed do mean the same thing. Kraus clearly
agrees. Take a look at Figure 14-4 on page 465 of _Antennas_For_All_Applications_,
third edition. The graph of the current phase is a square wave that jumps
from zero degrees to 180 degrees and back. Between you and Kraus, I choose Kraus.

A wire is one-dimensional with two and only two directions. In what dimension
do the extra phases of the current that you allude to exist? The real part of
I*e^jwt is either positive or negative, i.e. binary. The only possible change
of direction is abrupt. The change in magnitude is not abrupt, but the change
in phase is abrupt, just as Kraus says.
--
73, Cecil http://www.qsl.net/w5dxp



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