Antenna gain is always expressed in terms of the ______________________.

Question

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Antenna gain is a measure of how well an antenna directs or concentrates radio frequency energy in a specific direction, which is typically the direction of maximum radiation. This is in contrast to an isotropic radiator, which radiates equally in all directions. Gain does not involve the antenna's reactive components, charge lines, or the specific angular separation between half-power points, although the latter can be related to the antenna's directivity and beamwidth.

Antenna Gain Is Always Expressed in Terms of the ______________________