Bicollimated Near-Field Gregorian Reflector Antenna

Abstract

A bicollimated near-field Gregorian reflector is structurally similar to a classical confocal parabolic reflector, but its surfaces are shaped to have better scan capability. A geometrical optics procedure is used in designing the reflector surfaces. A three-dimensional ray tracing procedure is used in analyzing the aperture phase errors as the beam is scanned to different angles. The results show that the bicollimated configuration has about 45% greater angular scanning range than the corresponding confocal parabolic dual-reflector system.

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Document Details

Document Type
Technical Report
Publication Date
Feb 09, 1983
Accession Number
ADA125197

Entities

People

  • J. B. L. Rao

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Antennas
  • Computer Programs
  • Equations
  • Error Analysis
  • Errors
  • Geometry
  • Lens Antennas
  • Military Research
  • Near Field
  • Optics
  • Plane Waves
  • Polynomials
  • Ray Tracing
  • Reflectors
  • Scanning
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Phased Array Antenna Design.
  • Wave Propagation and Nonlinear Chaotic Dynamics.