Time harmonic fields produced by circular current loops

James M. Griffith, George Pan

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


New analytic expressions for the magnetic and electric fields generated by circular current loops (magnetic dipoles) are derived. They apply to near-zone, Fresnel-zone, and far-zone conditions; they asymptotically reduce to the popular small-loop equations in the far-zone. Analytical expressions for the fields produced by current-carrying conductors are valuable because of their rarity. They offer physical insight and a way to test the numerical methods needed for solving more complex problems. Areas for application include medicine, weapons, and nondestructive testing.

Original languageEnglish (US)
Article number5739530
Pages (from-to)2029-2033
Number of pages5
JournalIEEE Transactions on Magnetics
Issue number8
StatePublished - Aug 2011


  • Current loop
  • electric field
  • elliptic integral
  • magnetic dipole
  • magnetic field
  • magnetic vector potential

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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