An antenna question--43 ft vertical
Jeff wrote:
Can you measure VSWR on a 1 meter long Lecher line at 1 MHz?
VSWR is not meaningful in such a situation, however, you can measure
return loss and Reflection Coefficient etc.. Of course that in not to
say that VSWR is not used in situations where it is not appropriate in
order to indicate how good a match is, when RL or Reflection Coefficient
would be more appropriate.
Jeff
Jeff
Are you trying to say that VSWR is not meaningfull at 160M (to put it
in an Amateur context)?
For those that don't know, a Lecher wire is just a carefully contructed,
rigid parallel transmission line upon which one would slide a high
impedance sensor to find voltage minimum, maximum, and where they
occured. That and a Smith chart were used to solve transmission line
and impedance matching problems and were often home built by Amateurs
in the early VHF days.
Today you would use a VNA (Vector Network Analyzer).
--
Jim Pennino
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