JOINT ARMY-NAVY AIRCRAFT INSTRUMENTATION RESEARCH (JANAIR) ROTOR BLADE RADAR ANTENNA - PHASE 2

Abstract

This report covers a research project to investigate the feasibility of using the main rotor blade of a helicopter as a high resolution radar antenna. Fifteen-inch antenna sections were built and tested to study detailed leading and trailing edge array element environments. A full length, 173-in. array was built and tested. A jig was constructed to accept the full length array, and radiation pattern measurements made of beamwidth, focus, sidelobe levels, and front-to-back ratios. Beamwidth and aidelobes were measured under deflections simulating maximum flight loads. Photographs of thin radar sector slices emphasizing elevation and azimuth obstacle sensing capabilities taken from a modified PPI were compared with optical photographs. The array was then installed, covered with an erosion boot and tested in the leading edge of a used UH-1B rotor blade.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1965
Accession Number
AD0462744

Entities

People

  • David W. Young
  • James E. Palmer

Organizations

  • Bell Flight

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Antennas
  • Composite Materials
  • Contractors
  • Contracts
  • Helicopter Rotors
  • Helicopters
  • High Resolution
  • Leading Edges
  • Measurement
  • Photographs
  • Radar
  • Radar Antennas
  • Radiation
  • Radiation Patterns
  • Trailing Edges
  • Transmission Lines

Fields of Study

  • Engineering
  • Physics

Readers

  • Aerospace Engineering
  • Phased Array Antenna Design.
  • Radar Systems Engineering.