> For ground-laid radials, didn't Jim make the point that they serve primarily
> to shield the Earth from the antenna's RF?
> 73, kelly, ve4xt
That's true - to shield the radiating antenna from the LOSSY earth. Some
self-proclaimed experts have argued with me on that point, saying I was wrong
and that the function of the radials is not to act as a shield, but to return
earth currents back to the base of the vertical with minimal resistive loss.
Equally true. It's only a matter of semantics.
The earth makes a poor conductor for gathering the displacement currents from
the antenna and returning them to the base of the radiator. The radial wires
each act like a shunt wire to short out the ground resistance return the
current with less loss, effectively by-passing the lossy earth. By
definition, a shield. No matter which way you look at it, we are talking about
the exact same phenomenon.
Don k4kyv
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