Antenna Aperture - Thin Element Antennas

Thin Element Antennas

In the case of thin element antennas such as monopoles and dipoles, there is no simple relationship between physical area and effective area. However, the effective areas can be calculated from their power gain figures:

Wire antenna Power gain Effective area
Short dipole (Hertzian dipole) 1.5 0.1194 2
Half-wave dipole 1.64 0.1305 2
Quarter-wave monopole 3.28 0.2610 2

This assumes that the monopole antenna is mounted above an infinite ground plane.

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