An antenna question--43 ft vertical
In message , Jeff writes
A load in isolation without any transmission line connected cannot have
a standing wave, but it is still common to quote the mismatch as a VSWR
which is plain wrong, but still very common.
But as I've said (nitpickingly), any length of connection (no matter how
short) where the load is not a perfect match for its characteristic
impedance, will have a very tiny portion of a standing wave on it.
And as I've also said, the normal SWR meter DOESN'T measure (respond) to
SWR. It is a reflectometer, and it responds independently to the
forward-going signal and the reverse-going signal. It's really telling
you what the return loss ratio (RLR) is - but it's still perfectly
legitimate for it to be scaled in terms of SWR. It's a darned sight
easier way of finding out what the equivalent SWR would be than to try
and measure the Vmax and Vmin 'for real' along a long line.
--
Ian
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