John KD5YI wrote:
"Roy Lewallen" wrote in message
...
I've made a program to help visualize some transmission line phenomena.

(snip program description)

Thanks, Roy. It is very interesting.

I'm having a hard time getting my head around Demo 5. The waves go away
periodically (every 8 wavelengths?), sort of like a squegging oscillator.
(By the way, it appears that the line is two wavelengths long rather than
three.) This was totally unexpected. I will think more about this and try to
picture the reason.

Nice tool.

You'll find a detailed analysis which derives the reason for the
behavior in my posting on Dec. 28 in this thread. You can see it by
going to http://tinyurl.com/ypfshd. I agree it's counter-intuitive. It's
a consequence of the contrived zero-loss system.

Roy Lewallen, W7EL