Definitions for "Antenna gain"
Keywords:  isotropic, dbi, dipole, decibels, gain
The gain of an antenna is a measure of the antenna's ability to direct or focus radio energy over a region of space. High gain antennas have a more focused radiation pattern in a specific direction.
A measure of the effectiveness of a directional antenna in a given direction compared with a standard reference, usually an isotropic antenna. Specifically, the antenna gain is the ratio of the intensity radiated in a given direction from the antenna to the intensity of an isotropic source emitting the same power as the real antenna. Sometimes the term antenna gain is used in place of axial gain, which is the value of the antenna gain in the direction of the axis of the main lobe. See antenna pattern.
The ability of an antenna to "magnify" the energy received from the desired direction.
Measure of antenna efficiency compared to a reference antenna, typically a 1/4 wave type.