Antenna Gains Vs Antenna Effective Area
The relation between antenna gain and its effective area for different types of antenna such as dipole antenna,horn antenna, parabolic antenna is described below in the table.
Antenna Gain (G) = (4 x Pi x Ae)/λ2= (4 x Pi x f2 x Ae)/c2
Where,
G=antenna gain
Ae=Effective area
f=Carrier frequency
c=Speed of light
λ=Carrier wavelenght
Pi=3.14
Figure: Parabolic Reflector Antenna
| Antenna Type | Effective Area,meter2 | Power Gain relative to Isotropic Antenna |
|---|---|---|
| Isotropic | λ2/4Pi | 1 |
| Infinitesimal dipole or loop | 1.5 λ2/4Pi | 1.5 |
| Half-wave dipole | 1.64 λ2/4Pi | 1.64 |
| Horn, mouth area A | 0.81 A | 10 A/λ2 |
| Parabolic, face area A | 0.56 A | 7 A/λ2 |
| two crossed, perpendicular dipoles | 1.15 λ2/4Pi | 1.15 |
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