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Old September 8th 09, 06:30 PM posted to rec.radio.amateur.antenna
Art Unwin Art Unwin is offline
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First recorded activity by RadioBanter: Mar 2008
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Default The ultimate tilted monopole

On Sep 8, 11:00*am, Richard Fry wrote:
In the case of a single monopole mounted with its base at earth level,
adding tilt to it makes very little difference in its gain at
elevation angles up to +60 degrees or so, at any azimuth. *It does
partially fill the elevation null at the zenith produced by the
vertical monopole, as well as to produce a small amount of h-pol
radiation over most of the compass.

Modeling this in NEC for a 1 MHz, 1/4-wave, straight monopole by
moving its top 10 meters out of plumb changed its peak gain by about
0.01 dB compared to the untilted version, at any azimuth.

RF


Gain has never been as issue in tipping the radiator except for some
who which to interject it.
Pointing's vector shows a radiation patterm that is spherical and in a
state of equilibrium
It is not the radiation pattern of a donut which all are familiar
with. Thus if one wants coverage in all directions one must pursue an
array or conductor in equilibrium.
The present state of the art only considers gravity as being outside
the arbitrary border
such that the equal and opposite vecter is exactly that. ie at right
angles to the Earth's surface. Now we all know that the radiation
pattern of such does not remotely resemble that of Pointings vector!
To get to the point of a spherical radiation pattern one must
recognize that there is an additional vector outside the boundary that
one must consider to obtain equilibrium. So far you have shown
progress by tipping the radiator where it started to fill the void at
the center of the donut. This alone confirms the idea that another
vector has to be considered outside the arbitrary border. Now
rotation is an essential property
of the Universe as fracture of an arbitrary boundary is created by two
forces which are not on a common plane. This is a shear force which
also creates torque or spin ,so it stands to reason that the other
force in combination with gravity is a force of torque or rotation.
If Coriolis is not that vector what other characteristic fits the
bill?