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Near-field diffraction pattern
In telecommunication, near-field diffraction pattern is the diffraction pattern of an electromagnetic wave, which pattern is observed close to a source or aperture, as distinguished from a far-field[?] diffraction pattern.
Note: The pattern in the output plane is called the near-field radiation pattern. Synonym Fresnel diffraction pattern. Contrast with far-field diffraction pattern.
Source: from Federal Standard 1037C
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