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Old January 4th 06, 06:49 PM posted to rec.radio.amateur.antenna
W. Watson
 
Posts: n/a
Default Transmission Line Reflections

It seems reasonable that if I have an open ended transmission line that the
current would reflect back and change phase. After all, the electrons at the
end have nowhere to go but back down the line. However, the voltage is a
different matter. There is no phase reversal (or polarization change) There
doesn't seem to be an intuitive reason for this. However, if one examines
the equations for current and capacitive voltage, then it falls out of the
math. Still, where is the non-math that indicates this is true?

Now suppose instead the line is short circuited. The voltage returns down
the line, and the current does not. In this case, there doesn't seem to be
any non-math or intuitive feel for why the short should cause this--either
for voltage or current. Can one clue me in on what's really happening above
(voltage) and here (voltage and current)? Inquiring minds want to know.

Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
--
"I often quote myself - it adds spice to
my conversation." - George Bernard Shaw

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