Bill:
Concerning quarter-wave slopers:
<snip>
> I believe the current thinking is that they act like an inverted Ground
Plane
> so they MUST have some sort of top-loading (usually one or more Yagi's)
for
> them to work properly.
Modeling shows that this is true -- the Yagi acts like a top "counterpoise"
for the sloping wire. Indeed, removing the tower from the model essentially
doesn't change the feed-point impedance nor the radiation pattern for the
sloper.
Anyone who wants a copy of the EZNEC modeling files can ask me directly by
e-mail.
73, Dean, N6BV
n6bv@arrl.org
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