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Old December 22nd 08, 09:17 PM posted to rec.radio.amateur.antenna
Richard Knoppow Richard Knoppow is offline
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First recorded activity by RadioBanter: Oct 2006
Posts: 527
Default Vertical Monopole Radiation Characteristics


"Richard Fry" wrote in message
...
The idea that coverage is maximum for the 5/8th wave
radiator is common but in practice, (maybe we are saying
the
same thing) a straight 1/2 wave may have a smaller fading
ring because it does not have the high-angle lobe wich
appears on the 5/8th wave pattern.


My comments also were addressing the belief of the OP that
the peak
gain of a 5/8-wave vertical was very little different than
for a 1/4-
wave, because of a high-angle lobe developed by a 5/8-wave.

It is true that such a high-angle lobe develops to some
extent for all
vertical monopoles between 1/2-wave and 5/8-wave in
electrical
height. This can be seen in the plots linked below (FCC
method).

http://i62.photobucket.com/albums/h8...Comparison.jpg

But regardless, the 5/8-wave has the greatest peak gain of
the five
monopoles shown.

Snipping here...........

I was not disagreeing with what you say above, perhaps
I did not express it well.


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Richard Knoppow
Los Angeles
WB6KBL