Parabolic Reflector Modelling Techniques with a Laterally Displaced Feed

Abstract

This document looks at two techniques for modelling the radiation pattern of a parabolic reflector antenna. Both these methods use physical optics to determine the induced currents on the reflector due to the feed. The first method uses MATLAB's numerical integration routine to compute the far-field radiation pattern. The second method involves segmenting the reflector surface and approximating the amplitude and phase of the surface currents by a first degree polynomial. This approximation allows the integration to be performed analytically in closed-form. Three different reflector configurations are investigated including two configurations with a laterally displaced feed. Both these techniques yield accurate results but the latter technique had a significant improvement in computational efficiency.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2005
Accession Number
ADA437089

Entities

People

  • Frederic Arpin

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Amplitude
  • Anti-Ship Missiles
  • Coordinate Systems
  • Cross Polarization
  • Electromagnetic Fields
  • Electronic Countermeasures
  • Far Field
  • Geometry
  • Grids
  • Magnetic Fields
  • Numerical Integration
  • Radiation
  • Radiation Patterns
  • Reflectors
  • Simulations
  • Surface Plasmon Polaritons

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)