Isotropic Radiator

The isotropic radiator is a theoretical concept used for calculating antenna gain. An isotropic radiator emitting transmission energy uniformly in all directions has no antenna gain (0 dBi or 0 dBd). Omnidirectional antennas radiate transmission energy horizontally in a 360° radius, while less than 360° on a vertical axis. This means for instance that the antenna item number 10926 has an antenna gain of 2,5 dB.