> Tom, have you used Elnec to model the folded unipole?
No. Not really.
> How about Professor John Mullaney's design program that is
> specific to that antenna; have you used it? Ive been
> trying to find a copy to no avail.
No. I really don't have much interest in the folded unipole
since all my towers are insulated. When I did use shunt fed
towers or folded unipoles modeling programs didn't even
exist.
> Im especially interested in the 3 skirt wire version,
> spacing from the tower and the 105-115 degree electrical
> heights which Mullaney and others claim have a
> particularly wide VSWR bandwidth..
Some shunt fed towers will do that because the skirt makes
the antenna look very fat and the stub effect can compensate
reactance changes to a small extent.
A vertical with a good large ground system is already
significantly broader than of a dipole when both have
similar diameters because the L/D is twice as favorable for
the vertical. Even a regular 12 inch face tower, when series
fed, has very wide bandwidth so I just don't worry about it.
Since I don't worry about bandwidth and the efficiency is
the same, I just never worry Carl.
73 Tom
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