Cecil Moore wrote:
Consider a lossless open-circuit transmission line with reflections.
At one current loop maximum on the line, the instantaneous current
will be positive, i.e. flowing toward the load. At the next current
loop maximum, the instantaneous current will be negative, i.e. flowing
toward the source. 1/2 cycle later, these values reverse sign and
direction.

I think the word you're looking for is *Node*.

Assume the following graphic snapshot of a standing wave
is sinusoidal and includes magnitude and phase.



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1/2 cycle later the snapshot will look like this. Anyone who doesn't
believe it has never seen it on an o'scope.
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Right. But the antenna current plots are of the amplitude term of the
standing wave, shown as a function of position. It's not a time plot.
In the equation E*sin(w), E is the amplitude term. The amplitude term
is a contant. It does not vary with time. It varies with position
along the antenna. The solution to E*sin(w) does vary with time because
it is a function of time. You're confusing the two different
functions. Your answer, typically, is that the math is wrong.

73, Jim AC6XG


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By the way, here is an I(t) plot where there is a *net* flow of current.