Calculation of the H-Plane Aperture Distribution and Far Field Pattern for a Metal Plate Loaded Horn

Abstract

This note describes the results of a mathematical analysis of the aperture distribution of a horn which has been loaded with a conducting plate. The purpose of the plate is to improve the H-plane far field pattern of the horn and hence the angular resolution of a passive millimetre wave imager which uses a horn fed antenna. The calculation is based on the Fresnel-Kirchoff diffraction formula and account is taken of multiple reflections within the horn and from the plate. The resulting H-plane aperture distribution is far from uniform but has a sharp far field pattern. The E-plane distribution remains unchanged by the presence of the plate. Great Britain.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1988
Accession Number
ADA201007

Entities

People

  • A. H. Lettington
  • N. J. Hunaban

Organizations

  • Royal Signals and Radar Establishment

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Amplitude
  • Antennas
  • Computer Programs
  • Diffraction
  • Distribution Functions
  • Equations
  • Far Field
  • Foreign Languages
  • High Resolution
  • Intensity
  • Mathematical Analysis
  • Metal Plates
  • Millimeter Waves
  • Radiation
  • Two Dimensional
  • Wave Propagation
  • Wavefronts

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering