NEC-LIST:Equivalent diameter - short tapered element

Group:

I'm hoping someone will have a suggestion that will save me from going
through 15 years of ACES publications.

I am modeling a vertical monopole which is very short (about 18 meters)
compared to the wavelength of operation (LF). The monopole is linearly
tapered (not stepped) from about 0.3 m radius at the base to 0.05 m radius
at the top. In the past, I have used the average radius as the radius of an
equivalent, uniform radius element, with reasonable results, as compared to
actual measurements.

Now, I would like to get into the equivalence in a bit more depth. I don't
believe Leeson's Yagi methods apply here. Any insights or suggestions would
be welcomed.

Regards,

Jack

Jacob Z. Schanker, P.E.
65 Crandon Way
Rochester, NY 14618
Phone: 585 442 3909
Fax: 585 442 2182
j.schanker_at_ieee.org

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