Antenna Phase Centre Movement in U.H.F. Radio Positioning Systems

Abstract

Yagi array configurations such as are commonly used in UHF electronic distance measuring (EDM) systems are analysed to show the antenna phase centre movement for any look angle. It is shown that large phase centre movements may occur within the antenna main-beam pattern and the movement of phase centre is directly related to the angular derivative of the polar radiation pattern. A simple technique is proposed for qualitatively estimating the suitability of any antenna for this type of EDM application and a complete model is presented to evaluate the error introduced for any transmitter-receiver antenna orientation. Extensive results are presented for 7- and 12-element Yagis such as are commonly used in the SYLEDIS UHF Radio Positioning System.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1985
Accession Number
ADP004623

Entities

People

  • J. M. Tranquilla
  • S. R. Best

Organizations

  • University of New Brunswick

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Antennas
  • Aspect Angle
  • Boresights
  • Calibration
  • Coordinate Systems
  • Curvature
  • Electrical Engineering
  • Electronic Equipment
  • Errors
  • Far Field
  • Frequency
  • Geometry
  • Interrogators
  • Observation
  • Radiation
  • Radiation Patterns
  • Transmitting

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Geodesy
  • Phased Array Antenna Design.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems