On the Required Sub Dish and Feed Array Sizes of an Offset Feed, Electronic Scanning Gregorian System.

Abstract

The limitation of required sizes of a subreflector and a feed array in an offset-feed Gregorian system is investigated. The results are presented as functions of main reflector size and focal length, ratio of focal lengths of main and subreflectors, and range of scan angles. Plots of a wide range of cases for various parameters are presented which can be used as a design guide. From these plots typical designs are selected. It indicates that the required subreflector sizes range from 36 percent to 48 percent of the main reflector size while the array size varies from 38 percent to 69 percent when the total scan sector varies from 6 to 12 degrees. These required subreflector and array size may not be acceptable. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 24, 1981
Accession Number
ADA103015

Entities

People

  • J. K. Hsiao

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Antennas
  • Arrays
  • Boundaries
  • Degradation
  • Efficiency
  • Geometry
  • High Resolution
  • Military Research
  • Near Field
  • Phased Arrays
  • Plane Waves
  • Radiation Patterns
  • Reflectors
  • Security
  • Sidelobes
  • Sizes (Dimensions)
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Phased Array Antenna Design.

Technology Areas

  • Microelectronics