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IEVref: | 712-02-47 | ID: | |

Language: | en | Status: Standard | |

Term: | (total) effective area (of an antenna for a given direction) | ||

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Definition: | in a given direction, the ratio of the available power at the terminals of a receiving antenna to the power flux density of a plane wave incident from that direction, the wave being polarization matched to the antenna
NOTE 1 – If no direction is specified, the direction corresponding to maximum available power is implied. NOTE 2 – The total effective area is the sum of the partial effective areas for any two orthogonal polarizations of components of the antenna polarization. NOTE 3 – In free space, the effective area $G}_{\text{i}}=\frac{4\pi {A}_{\text{e}}}{{\lambda}^{2}$
where NOTE 4 – When an aperture illumination function is uniform in amplitude and phase and the given direction is perpendicular to the aperture, the total effective area of a radiating aperture of a lossless antennas is equal to its geometric area. | ||

Publication date: | 1992-04 | ||

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Internal notes: | 2017-06-02: Cleanup - Remove Attached Image 712-02-47.gif | ||

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$G}_{\text{i}}=\frac{4\pi {A}_{\text{e}}}{{\lambda}^{2}$

where *λ* is the wavelength.