I am familiar with that research. The bottom line was that by spacing the feed
points of each set of dipoles approximately 6 inches from each other *and* by
spacing the ends of each of the shorter dipoles approximately 3 feet below the
longer dipole above it, interaction would be minimized.
I believe that the term “interaction” covered both resonance and bandwidth of
the higher frequency dipoles but the bandwidth issue might be based on my own
experiences or preconceived notions. Not sure at this point — it’s been many
years since I read that report..
73,
Doug, W7KF
http://www.w7kf.com <http://www.w7kf.com/>
> On Sep 30, 2017, at 7:56 AM, Chuck Dietz <w5prchuck@gmail.com> wrote:
>
> With a fan dipole, research sponsored by the military showed that it helps
> if you can spread the dipoles apart about 8 to 10 inches at the center. I
> have a piece of plastic about two feet long and about 8 inches wide that I
> drilled holes in for each wire and for a u bolt for the balun. A wire runs
> between the holes on each side to connect the dipoles.
>
> Chuck W5PR
>
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