Isotropic Radiator

(redirected from Isotropic antennas)

isotropic radiator

[¦ī·sə¦trä·pik ′rād·ē‚ād·ər]
(physics)
An energy source that radiates uniformly in all directions.

Isotropic Radiator

 

an imaginary antenna emitting electromagnetic energy of equal intensity in all directions. It has a circular directivity pattern in any plane. The isotropic radiator is used in antenna technology as a standard for the comparative evaluation of the directional characteristics of various antennas, particularly in determining the front-to-rear factor. A great deal of attention is being devoted to the design of antennas whose directional properties are close to those of an isotropic radiator. In particular, such antennas are required for use on artificial earth satellites that are unstabilized in space. Antennas of that type make possible the maintenance of communications with the satellite when it changes its position in space.

References in periodicals archive ?
Theoretically, non-directional radiation pattern is known as isotropic radiation pattern; but, isotropic antennas are practically not available.
M2 EQUITYBITES-November 5, 2015-Anritsu introduces isotropic antennas
Anritsu Company said it has expanded its electromagnetic field (EMF) measurement system with the introduction of isotropic antennas that provide frequency coverage from nine kHz to six GHz.
TELECOMWORLDWIRE-November 5, 2015-Anritsu introduces isotropic antennas
Consider a linear uniform adaptive array with M isotropic antennas separated by a distance d between neighbors, k + 1 independent transmitted signals impinge the array from directions [[theta].
Isotropic antennas provide a basis for describing how well an antenna can perform.
s] = the spreading loss in dB between isotropic antennas
The proposed method has been applied to generate two different beam pairs from a single concentric ring array of isotropic antennas.
The above definition characterizes the communication link performance of two antennas as compared to two ideal multi-element isotropic antennas that pick up all the available multi-pole channel power, i.
However, by assuming isotropic antennas, we get range and frequency terms in the RF equation.
One other point about spreading loss: The loss value derived from the nomograph and from the above formula is for the spreading loss between two isotropic antennas (that is, antennas with "unity" or 0-dB gain).