English

Alternative forms

• near-field

Noun

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

• near field communication

References

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