AN ANALYSIS OF ANTENNAS CONFRONTED BY OBSTACLES

Abstract

The principle of reciprocity is employed to formulate integral expressions for the fields of antennas confronted by obstacles. The expressions formulated are particularly useful in applying a high-speed computer to the calculation of antenna-obstacle interaction. The integrals encountered require surface integrations over the antenna aperture or on a surface enclosing the obstacle. The problem of computing the far-field pattern of an antenna-obstacle system is treated in detail. A number of approximate methods for finding the plane-wave scattered fields and the fields on the obstacles is discussed. The validity of the expressions formulated is checked by a comparison of experiment and calculation. Complex obstacle configurations, a cylinder and dielectric sheet combination, and finally a pair of parallel cylinders are treated successfully by approximate methods.

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Document Details

Document Type
Technical Report
Publication Date
Nov 30, 1961
Accession Number
AD0268389

Entities

People

  • Thomas E. Charlton

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Antenna Apertures
  • Antenna Radiation Patterns
  • Antennas
  • Boundaries
  • Computers
  • Dipole Moments
  • Electric Fields
  • Electrical Properties
  • Electromagnetic Fields
  • Electromagnetic Radiation
  • Far Field
  • Geometry
  • Magnetic Fields
  • Plane Waves
  • Wave Equations
  • Waves

Fields of Study

  • Engineering

Readers

  • Fluid Dynamics.
  • Organizational Psychology.
  • Plasma Physics / Magnetohydrodynamics