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Radius vs Radiansphere - What's the difference?

radius | radiansphere |

As nouns the difference between radius and radiansphere

is that radius is radius while radiansphere is a spherical region of radius λ/2π around a small dipole electromagnetic antenna this is the distance at which the induction and radiation terms are equal in magnitude inside, the induction terms dominate in radio antenna theory the radiansphere is a convenient definition for the boundary between near-field and far-field regions.

radius

English

Noun

(en-noun)
  • (anatomy) The long bone in the forearm, on the side of the thumb.
  • (zoology) The lighter bone (or fused portion of bone) in the forelimb of an animal.
  • (entomology) One of the major veins of the insect wing, between the subcosta and the media
  • (geometry) A line segment between any point on the circumference of a circle and its center/centre.
  • (geometry) The length of this line segment.

    • Synonyms

    * (vein of insect wing) R

    Related terms

    * radial * radiate, radiation

    See also

    * ulna * semidiameter *

    Anagrams

    * English nouns with irregular plurals ----

    radiansphere

    English

    Noun

    (en noun)
  • A spherical region of radius ?/2? around a small dipole electromagnetic antenna. This is the distance at which the induction and radiation terms are equal in magnitude. Inside, the induction terms dominate. In radio antenna theory the radiansphere is a convenient definition for the boundary between near-field and far-field regions.
  • * 1959 , , "The Radiansphere around a Small Antenna", Proceedings of the IRE , August, Volume 47, Issue 8, page 1325
  • *:"The "radiansphere'" is the boundary between the near field and the far field of a small antenna. Its radius is one radianlength (?/2?), at which distance the three terms of the field are equal in magnitude. A "small" antenna is one somewhat smaller than the '''radiansphere''', but it has a "sphere of influence" occupying the ' radiansphere .