Telecom Dictionary - Definitions of terms

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Near Field - Definition and Use

Near Field - Synonym near-field region. Near Field is defined as 1. The close-in region of an antenna wherein the angular field distribution is dependent upon distance from the antenna. Synonym near zone. 2. In optical fiber communications, the region close to a source or aperture. Note: The diffraction pattern in this region typically differs significantly from that observed at infinity and varies with distance from the source.