Radiation Pattern Calculations for a Waveguide Lens Multiple-Beam Antenna Operating in the Aj Mode

Abstract

The jammer suppression obtained with a multiple-beam antenna (MBA) by radiation pattern shaping is studied for applications with the DSCS 3 satellites. Results are presented for three separate MBA designs each consisting of an X-band waveguide lens excited by a multi-element feed cluster located in its focal plane. To demonstrate the AJ performance of each MBA, calculations were carried out for a large number of jammer locations distributed over the surface of the earth. At each location, the jammer suppression is achieved by adjusting the amplitude excitation of the feed elements to create an earth-coverage radiation pattern with a minimum located in the direction of the jammer. Results which characterize the AJ performance of each MBA in terms of the null level at the jammer, null coverage area and frequency dependence are presented.

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Document Details

Document Type
Technical Report
Publication Date
Oct 14, 1975
Accession Number
ADA020167

Entities

People

  • Bing M. Potts

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Artificial Satellites
  • Circular Polarization
  • Communication Satellites
  • Communication Systems
  • Focal Planes
  • Frequency
  • Geometry
  • Latitude
  • Lens Antennas
  • Longitude
  • Multiple Beam Antennas
  • Polarization
  • Radiation Patterns
  • Satellite Communications
  • Steering
  • X Band

Fields of Study

  • Physics

Readers

  • Phased Array Antenna Design.
  • Tactical Satellite Communications Systems Engineering.

Technology Areas

  • Space