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A n t e n n a P a g e ~|~
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| Links: - qth.com/antennas
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Vertical Antenna:
First antenna is a 1/4
wavelength Vertical Dipole
Second antenna is a
1/2 wavelength Vertical Dipole (Collinear Array)
Notice the reflection in the "Ground Plane" creates
a Virtual Second Element
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| As
the second dipole is introduced, note the Flattening of the pattern, this
is effectively doubling the Antenna Gain, i.e., reducing the skywave and
groundwaves. |
| This page was created
with the intent to give general concepts.
Conveying:
1) a vertical
antenna is omni-directional;
2) the groundplane
(reflection) creates virtual elements;
3) and the
effect of adding more elements (Collinear Array) on
directional gain. --Less sky & ground
waves.
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