wrote:
Seems to me that the sinusoidal standing wave with minima and maxima
at the quarter wave points can only arise with single frequency
sinusoidal excitation of the line. Are there other signals which
will produce this result?

Probably not, but that makes sinusoids unique, not magic.

What about Ramo and Whinnery's forward Poynting vector and reflected
Poynting vector? Why do you choose to ignore them?

I haven't used them because I don't need them to arrive at an answer.

You need them to keep from making the same mistakes over and over.

Why make the solution more complex than necessary?
Just to scare off the neophyte?

Nope, your solution is simple-minded.

Perhaps. Or maybe component waves are not the answer.

Then go argue with Ramo & Whinnery.

In this context, we are discussing transmission lines. I make NO
assertions about light, how rings happen, or don't, or whether the
theory and practice of optics is in way analogous to what happens
on a transmission line.

You will never understand the present topic unless you understand that
EM wave interference doesn't affect the flow of energy in the individual
waves. That is true for light and RF.
--
73, Cecil http://www.qsl.net/w5dxp



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