Electromagnetic Transmission through an Aperture of Arbitrary Shape in a Conducting Screen.

Abstract

In this work the problem of electromagnetic transmission through an arbitrarily-shaped aperture (undercovered) or window (covered with a thin glossy dielectric sheet) in a perfectly conducting plane is treated. The method of moments is used to solve numerically the integral equation for the equivalent magnetic current. Triangular patching is used to conform to the arbitrary shape. Local position vectors are chosen as both the expansion functions and the testing functions. The centroid-pair matching is utilized to complete the approximation. A set of computer codes is presented and briefly described. To illustrate the solutions, computations are given for various apertures (different shapes), windows (different dielectric materials), and half spaces (different media). Numerical results are also compared with other data, if available. For windows with proper thickness or half spaces with proper media, the phenomenon of aperture resonance is demonstrated. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1982
Accession Number
ADA115593

Entities

People

  • Chih-lin I
  • Roger F. Harrington

Organizations

  • Syracuse University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Computations
  • Computer Programs
  • Computers
  • Dielectric Permittivity
  • Dielectrics
  • Electric Fields
  • Electromagnetic Fields
  • Electromagnetic Scattering
  • Equations
  • Excitation
  • Far Field
  • Magnetic Fields
  • Materials
  • Measurement
  • New York
  • Thickness

Fields of Study

  • Physics

Readers

  • Computer Vision.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Space