| Definition: | the ratio, generally expressed in decibels, of the radiation intensity produced by an antenna in a given direction to the radiation intensity that would be obtained if the power accepted by the antenna were radiated equally in all directions
NOTE 1 – If no direction is specified, the direction of maximum radiation intensity from the given antenna is implied.
NOTE 2 – If the antenna is lossless its absolute gain is equal to its directivity in the same direction.
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