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Old September 8th 09, 01:52 AM posted to rec.radio.amateur.antenna
Dale Parfitt[_3_] Dale Parfitt[_3_] is offline
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First recorded activity by RadioBanter: Jan 2008
Posts: 141
Default The ultimate tilted monopole


"christofire" wrote in message
...
In the words of the great Basil Fawlty "you'll like this one"!

It appears to be believed, by one or two who frequent this NG, that a
tilted monopole provides more gain and somehow 'better' EM radiation than
a vertical one. However, we've seen that tilting a vertical monopole
distorts its radiation pattern so it is no longer truly omni-directional
in the horizontal plane. Then why not create an array of such tilted
monopoles, all tilted in different directions, to restore the
omni-directional pattern.

The result is a discone antenna, or a discage like the one illustrated at
http://gvarc.us/GVARCFrames/Titan/Di...ch4life002.jpg. I wonder
what the 'new-age theorists' would make of this. Does it require the
Coriolis effect to analyse it, or is the old-fashioned version provided by
Schellkunoff & Friis(#) still adequate?

Chris


# Schellkunoff, S.A., and Friis, H.T. Antennas, theory and practice.
John Wiley & Sons Inc., New York, 1952. pp 104 to 106.



... and if that isn't enough, how about the Racal Antennas 'Difan'
http://www.racalantennas.com/product...45-30mhz.aspx?


It makes one wonder how they "stumbled" onto these designs without a
knowledge of equalibrium and coriolis.

I can already see Art's reply- how do you know they did not take these into
account?
My only answer is- because you're the only one that does.
Dale W4OP