directional factor is a characteristic value of antennaswhich
is determined from the ratio ofthe
anisotropic directional antennato the isotropic radiation of an
Directional antennas have distinct radiation characteristics with one main radiation direction. Omnidirectional antennas, on the other hand, radiate in all directions with the same radiation density. The ratio of the radiation density of a directional antenna or parabolic antenna in its main lobe and the omnidirectional radiation intensity of an omnidirectional antenna results in the directional factor.