On Jan 13, 2:44*pm, "Dave" wrote:
"Art Unwin" wrote in message

...



What diametric ratio must a fractional wave length radiator be to
allow contrary current flow thru it's center. ?
Diameter / wavelength = 1.0, * *0.5, *0.1. * * 0.001, * * *0.0001,
0.00001,...?
Regards
Art

infinite

David
Just for the record, skin depth is proportional to frequency
Thus for very hight frequency the skin depth is exceedingly small
This tells us that the effect of eddy current with respect to the
diameter
is NOT infinite but limit dependent on the applied frequency.
I am not extending this thread, but on rereading it is obvious to me
that
there is a boundary within which a current could possibly travel. But
since the current is zero
at the end I am more inclined to think that applied current is
balanced at the source so that zero current is inevitable at the end
of the radiator, How this is done appears to be something like
a pump action which with laminar flow creates cavitation resistances
in line with Bernoulis theorems.IE velocity changes that are
dependent on distributed load losses of the radiator
The end of this thread !
Art
Art