"Richard Fry" wrote in message
...
The link below leads to a composite NEC plot comparing the elevation
patterns of a vertical dipole with one that is "tipped."

Sure enough, the tipped antenna has slightly more peak gain, and the
elevation null at the zenith above the vertical version is filled --
just as Art has posted.

However the reason for that is NOT that the antenna itself radiates
better when tipped. It is the result of directing more of the peak
gain of the radiation pattern launched by the antenna (which is a
constant regardless of its physical orientation) toward the earth near
the antenna. This increases the earth reflection in that direction/
sector.

Those considering only the net, far-field radiation as calculated by
NEC may think that the antenna itself radiates better when tipped.
But it is only the contribution of the earth reflection that makes it
appear so.

The radiation pattern of the antenna itself remains the same,
regardless of its physical orientation.

http://i62.photobucket.com/albums/h8...cal_Dipole.gif

RF

and even more important, the vertical null is reduced getting it closer to
art's 'equilibrium'.

On Sep 6, 8:10*am, "Dave" wrote:
and even more important, the vertical null is reduced getting it
closer to art's 'equilibrium'.

Only thing is that my plots are based on 1/2-wave antennas.

Art says only full wave antennas have equilibrium.

Perhaps he'll explain.

RF

"Richard Fry" wrote in message
...
On Sep 6, 8:10 am, "Dave" wrote:
and even more important, the vertical null is reduced getting it
closer to art's 'equilibrium'.
Only thing is that my plots are based on 1/2-wave antennas.
Art says only full wave antennas have equilibrium.
Perhaps he'll explain.

try a full wave dipole, maybe it will get closer to 'equilibrium' by art's
definition.

On Sep 6, 9:33*am, "Dave" wrote:
try a full wave dipole, maybe it will get closer to 'equilibrium'
by art's definition.

The lobe of a full-wave dipole is narrower than that of a 1/2-wave
dipole, so the tipped version of the full-wave should show the worse
"equilibrium" of the two configurations.

RF