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Old January 2nd 08, 01:04 PM posted to rec.radio.amateur.antenna
Keith Dysart[_2_] Keith Dysart[_2_] is offline
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First recorded activity by RadioBanter: May 2007
Posts: 492
Default Standing-Wave Current vs Traveling-Wave Current

On Jan 2, 2:59*am, Richard Clark wrote:
On Tue, 1 Jan 2008 18:44:17 -0800 (PST), Keith Dysart

wrote:
Since the experiment ends before
the reflection returns to the generator,


Is it a step, or is it a pulse?


As stated, a step.

Makes a huge difference in the analysis.

the impedance
of the generator is irrelevant.


The impedance perhaps, but not the voltage. *I specifically offered a
difference of sources (Norton vs. Thevenin). *The impedance is the
same either way, the voltage is not. *As you introduce power later in
this response, power at the source is even more contentious. *As such,
we can drop this altogether.


The generality of the specified voltage (V) would seem
to adequately cover both the Thevenin and Norton generators.

Ah. The challenge of written precisely. Consider the
generator to be on the left end of the line and the open
to be at the right end. When the capacitance at the right
end charges to 2 * V, the current now has to stop a little
bit more to the left.


Still doesn't make sense, and I wouldn't attribute it to precision
seeing that you've written the same thing twice.


Given your previous writings, I suspect that you have
a solid understanding of the behaviour of an open-circuited
transmission line excited with a step function.

Perhaps you could make an attempt at writing a clear
description of the behaviour of such a system in terms
of charge flow and storage. Since "wave" is a word
overloaded with meanings, it would be good not to use
it in the description.

Once a clear description exists, I can extend it
using the same clear terminology to illustrate
the points of interest.

...Keith