Radiation pattern

Radiation Pattern may also be a description of the pattern of light produced by an LED; for example Batwing, Lambertian or Side Emitting.

In telecommunications, a radiation pattern is one of:

The variation of the field intensity of an antenna as an angular function with respect to the axis. Also, the radiation pattern is a graphical depiction of the relative field strength transmitted from or received by the antenna.
A radiation pattern is usually represented graphically for the far-field conditions along the electrical field and the magnetic field vectors, along the direction of maximum radiation or E-plane and H-plane.
In fiber optics, the relative power distribution at the output of a fiber or active device as a function of position or angle. The near-field radiation pattern describes the radiant emittance (W·m^-2) as a function of position in the plane of the exit face of an optical fiber. The far-field radiation pattern describes the irradiance as a function of angle in the far-field region of the exit face of an optical fiber. The radiation pattern may be a function of the length of the fiber, the manner in which it is excited, and the wavelength. The radiation pattern in this context is sometimes also known as the directivity pattern.