Space Fed Subarrays Using a Displaced Feed

Abstract

A multiple beam (transform) feed for a phase-scanned lens has the desirable property of forming subarrays for the insertion of time delays across the large aperture. However, at certain scan angles and particular frequencies the multiple beam feed can have a focus at its front face. This phenomenon can be unacceptable when transmit amplifiers are used at this location since it requires that all power be provided from a few or even a single feed port. This paper presents a procedure for defocusing the feed to avoid the large dynamic range problem and spread the required power among a larger fraction of feed eIements.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1994
Accession Number
ADA411090

Entities

People

  • Robert J. Mailloux

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Amplitude
  • Arrays
  • Bandwidth
  • Dynamic Range
  • Equations
  • Far Field
  • Focal Planes
  • Frequency
  • Geometry
  • Illumination
  • Near Field
  • Phase Shift
  • Radiation
  • Radiation Patterns
  • Sidelobes

Fields of Study

  • Physics

Readers

  • Phased Array Antenna Design.

Technology Areas

  • Space