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near field

From Wiktionary, the free dictionary
See also: nearfield and near-field

English

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Alternative forms

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Noun

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near field (plural near fields)

  1. (acoustics) The region within a distance a fraction of a wavelength from a sound source. Accordingly, the outer boundary of the near-field region is closer for high-pitched sound than for low-pitched sound.
  2. (electronics, communication) The region within about half a wavelength from an electrically small antenna.[1] More specifically it is the region within the radiansphere.[2]

Derived terms

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References

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  1. ^ Charles Capps, Near field or far field? EDN, August 16, 2001, pp. 95-102.
  2. ^ Wheeler, H.A.; "The Radiansphere around a Small Antenna"; Proceedings of the IRE Aug. 1959, Volume: 47 Issue:8 pp: 1325 - 1331. 10.1109/JRPROC.1959.287198
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