| Definition: | a graphical representation of the distribution in space of a quantity which characterizes the electromagnetic field produced by an antenna
NOTE 1 – For example, a radiation pattern may be a plot of the magnitude of a far field component, or alternatively contours of equal value of a far field component, at a given distance from the antenna, as a function of the direction.
NOTE 2 – In French, the term "diagramme de directivité" is the preferred term when the quantity used to characterize the field does not depend upon the power fed to the antenna.
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