Discussion
Why does a horizontal dipole close to the ground radiate poorly at low angles?
Answer: D
The out of phase image means the direct and reflected fields nearly cancel along the surface, leaving radiation directed steeply upward. Raising the antenna towards a half wavelength brings the reflection back into phase at useful angles. Ground absorbs partially rather than completely, radiation resistance changes but does not vanish, and lobe splitting occurs at greater heights rather than at low ones. It is the phase of the image, not any absorption, that governs the effect.
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