measures wrote:
AG6K>>>? In a slotted line, when the swr is less than perfect, the voltage on
AG6K>>>the line varies with position.
>>
KE9NA>>What is "less than perfect" SWR, Rich? I thought SWR was a ratio of max
kE9NA>>voltage to min voltage on the line. What is meant by "less than
perfect"?
>>
AG6K>More than 1 to 1.
Actually, now that I re-read your original comment, I agree and disagree. With
VSWR of greater than 1:1, the voltage on the line does vary with position. I
thought I said that when I talked about slotted line measurements. However,
the voltage varies with position regardless of whether there is a VSWR of more
than 1:1 or not! So you aren't completely correct.
Since the input signal is a sine wave or some other sort of periodic function,
by definition, the voltage varies as you move up and down the line. With a
VSWR of 1:1, that voltage STILL varies, the RATIO of peak to minimum voltage is
1:1. With a VSWR of greater than 1:1 though, the RATIO of peak to minimum is
STILL constant down the line. And since the VSWR is that ratio, it is hence, a
constant.
73,
Jon
KE9NA
--------------------------------------------------------------------------
The Second Amendment is NOT about duck hunting!
Jon Ogden
jono@enteract.com
www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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