harrogate2 wrote:
A piece of coax that is an even multiple of a quarter wavelength
reflects the same at the connection point as at the remote end.

+----------Z0--------Source
|
| 1/4WL stub
|
|

Given a constant Z0 above, there are no reflections at the connection
point '+'. All the reflections occur at the open end of the stub. For
an ideal lossless stub, the voltage to current ratio at the
open-circuit reflection point is infinite. The voltage to current ratio
at '+' is zero but there are no reflections occuring at '+'.

Think about it. If 100% reflection occured at the connection point,
there would be no energy in the stub to be reflected at the open end.
Yet measurements in the example above prove that the forward and
reflected power inside the stub are identical to the forward and
reflected power at the connection point.
--
73, Cecil http://www.qsl.net/w5dxp