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→Directivity
* '''Isotropic:''' An isotropic antenna is an ideal antenna which radiates uniform power in all directions. Hence its directivity would be 1(0 dB). It's radiation pattern is a sphere.
* '''Omnidirectional:''' Omnidirectional antenna radiates uniform power in planes described by a normal i.e. in any plane perpendicular to a normal, the radiation power would be equal in all directions. Hence the radiation pattern for a simple omnidirectional antenna resembles a “doughnut” as shown in the figure. But it's pattern can also be complex like this figure.
* '''Directional:''' Directional antennas can radiate greater amount of power in a one specific direction compared to any other direction. Their directivities are very high. They have complicated (and often interesting) radiation patterns.
{| class="wikitable"
|+Typical directivities of some common antennas