A theoretical antenna that radiates equally in all directions and has zero gain by definition. An antenna is a passive device and so cannot amplify a signal. However, it can shape the signal to be stronger in one direction, leading to gain, which is often quoted relative to an isotropic.

This is a hypothetical one-directional point-source antenna that serves as a reference for the measurement of antenna gain for engineering calculations.

a hypothetical antenna radiating or receiving equally in all directions

an antenna that radiates equally in all directions

an idealized, theoretical antenna having equal radiation intensity in all directions

a theoretical, dimensionless point source with a completely spherical radiation pattern

a theoretical point source radiating equal power in all directions, resulting in a perfect spherical pattern

A hypothetical omnidirectional point-source antenna that serves as an engineering reference for the measurement of antenna gain.

Isotropic antenna is an omnidirectionary antenna which transmit equably in all directions.

Hypothetical omni directional point-source antenna that serves as an engineering reference for the measurement of antenna gain.

A theoretical device that radiates energy or receives energy equally from all directions.

An isotropic antenna is a theoretical antenna. If it existed in the real world, it would radiate a wireless signal equally in all directions (front, back, left, right, up, and down). The signal strength from a theoretical isotropic antenna is used as a reference level to measure the gain (focusing power) of real-world antennas.

A hypothetical, lossless antenna having equal radiation intensity in all directions. Used as a zero dB gain reference in directivity calculation (gain). The sun is often given as an example of an isotropic radiator.

An isotropic antenna is an ideal antenna that radiates power with unit gain uniformly in all directions and is often used as a reference for antenna gains in wireless systems. There is no actual physical isotropic antenna; a close approximation is a stack of two pairs of crossed dipole antennas driven in quadrature. The radiation pattern for the isotropic antenna is a sphere with the antenna at its center.