Antenna Technology for Space Based Radar. Part I. Subarraying Feeds: Bandwidth, Low Sidelobe Performance and Subarray Nulling,

Abstract

This brief analysis outlines the features of a subarraying system with amplitude control circuits at the feed array face. The analysis treats the idealization of the lens feed as a continuous aperture, and includes the assumption that the cylindrical lens back face is in the far field of the array feed. The analysis includes the effect of truncation at the main array, and demonstrates that the high sidelobes of the conventional sin x/x subarray illumination, when truncated, are primary contributors to high grating lobe levels under certain circumstances. The proposed correction for these truncation effects is to produce a low sidelobe subarray illumination at the main aperture by controlling the feed array taper. Numerical results show the effectiveness of this subarraying technique for controlling the array far sidelobes and grating lobe levels, and for producing wide band null troughs within the subarray pattern. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1980
Accession Number
ADA085568

Entities

People

  • Robert J. Mailloux

Organizations

  • Rome Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Algorithms
  • Amplitude
  • Antennas
  • Arrays
  • Bandwidth
  • Beam Steering
  • Far Field
  • Frequency
  • Illumination
  • Phased Arrays
  • Radar
  • Radiation
  • Radiation Patterns
  • Sidelobes
  • Space Based
  • Steering
  • Truncation

Readers

  • Phased Array Antenna Design.

Technology Areas

  • Space