rickman wrote:

On 7/7/2015 6:25 AM, Ian Jackson wrote:
In message , Jerry Stuckle
writes


Sure, there is ALWAYS VSWR. It may be 1:1, but it's always there.

If there's no reflection, there can be no standing wave. So, being
pedantic, there's no such thing as an SWR of 1:1!

Why do you say that? If there is no reflection the voltage on the line
is purely due to the forward signal and so the VSWR is 1:1. What's
wrong with that?

You are, of course, right. I suspect that VSWR was defined to give
technicians a nice easy number to aim for, rather than infinite return
loss, to indicate no reflections.


--
Roger Hayter