Losses in a Periodically Gapped Cable Armor in Contact with the Surrounding Soil

Abstract

A variational method is presented for evaluating the effective impedance of the periodically gapped armor on a buried cable. The armor is assumed to be in direct contact with the surrounding soil, so that the gaps, which are intended to break the longitudinal electrical conductivity, are in fact electrically bridged by the soil. From the effective impedance can be calculated the armor losses and, when the cable is used as a buried antenna, the reduction in antenna efficiency. Numerical results are presented graphically, and some corroborating experimental evidence is reported.

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Document Details

Document Type
Technical Report
Publication Date
Apr 25, 1975
Accession Number
ADA010592

Entities

People

  • Michael L. Burrows

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Bessel Functions
  • Coefficients
  • Conductivity
  • Delta Functions
  • Electric Fields
  • Electrical Conductivity
  • Electrical Properties
  • Electronics Laboratories
  • Equations
  • Frequency
  • Materials
  • Military Research
  • Permeability
  • Resistance
  • Stationary
  • Thickness

Fields of Study

  • Engineering

Readers

  • Electrical Engineering
  • Microwave Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.