Current Spreading in Long Objects

Abstract

This note derives the distribution of electrical spreading currents along the length of solid conducting objects for which the length substantially exceeds the width. Sources and sinks of DC (or very low frequency AC) current are placed at one end of the object, and the fall-off of spreading current is studied as a function of length. The fall-off can be great; for instance in the case of a solid rectangular object, the fall-off of spreading current along the length is 27dB per unit width. Comparison is made to inductive coupling, which becomes important as frequency increases.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2008
Accession Number
ADA492130

Entities

People

  • D. Eardley

Organizations

  • MITRE Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Bodies
  • Boundaries
  • Boundary Value Problems
  • Cartesian Coordinates
  • Corporations
  • Couplings
  • Eigenvalues
  • Eigenvectors
  • Electric Fields
  • Equations
  • Frequency
  • Geometry
  • Magnetic Fields
  • Materials
  • Security
  • Thickness

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Mathematics or Statistics
  • Plasma Physics / Magnetohydrodynamics