Most of my modelling has been with wire antennas but now I am modelling
some verticals with elements having diameters of between 38mm and 25mm
for 20m and 40m (and using drooping elevated radials made of wire)
I usually use around 9 or 11 segments for a 1/4 wave element. I noticed
that when I changed the number of segments the results for things like
feed impedance changed quite dramatically.
Are there some guidelines for the number of segments for a 1/4 wave
straight wire element?
How is the choice of segment length affected by the diameter of the
element tubing? Is there a limit on the ratio of segment length to
segment diameter?
73,
Dave G3UEG
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