A Surface Formulation for Characteristic Modes of Material Bodies

Abstract

A theory of characteristic modes for material bodies is developed using equivalent surface currents. This is in contrast to the alternative approach using induced volume currents. The mode currents form a weighted orthogonal set over the material body surface, and the mode fields form an orthogonal set over the sphere at infinity. The characteristic modes of material bodies have most of the properties of those for perfectly conducting bodies. Formulas for the use of these modes in electromagnetic scattering problems are given. A procedure for computing the characteristic modes is developed, and applied to two-dimensional bodies. Illustrative examples of the computation of characteristic currents and scattering cross sections are given for cylinders of different material constants.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1974
Accession Number
ADA000285

Entities

People

  • Roger F. Harrington
  • Yu Chang

Organizations

  • Syracuse University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computer Programs
  • Computers
  • Coordinate Systems
  • Eigenvalues
  • Eigenvectors
  • Electric Fields
  • Electromagnetic Scattering
  • Equations
  • Magnetic Fields
  • Materials
  • Method Of Moments
  • Plane Waves
  • Polarization
  • Radiation
  • Scattering Cross Sections
  • Two Dimensional
  • Vector Spaces

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering