Dipoles above a perfectly conducting ground plane.
Vertically polarized antennas.
place a vertically orientated dipole at a height h above a perfectly conducting infinite plane earth. If the earth were not there, the field pattern above the earth would be identical, and would be modeled by the sum of the fields from the source dipole a
| + Source
| -
--------------------------------------------------
| + Image
| -
The image of the vertical dipole in the ground plane consists of a virtual dipole having the SAME current direction as the source dipole. This is because the electric fields from the source dipole meet the ground plane at right angles, so electric field o
Previous slide | Next slide | Back to first slide | View graphic version |