ORIENTATION OF LINEARLY POLARIZED HF ANTENNAS FOR SHORT-PATH COMMUNICATION VIA THE IONOSPHERE NEAR THE GEOMAGNETIC EQUATOR

Abstract

This report suggests that there is an optimum orientation for linearly polarized antennas used on short ionospheric paths near the geomagnetic equator. Consideration of the magneto-ionic theory and of its application to antenna-to-medium coupling problems indicates that aligning such antennas parallel to the earth's magnetic field will maximize signal strength while minimizing polarization fading on such paths. Linearly polarized antennas with such an orientation may intercept less interference than vertically polarized antennas. If this is true, the signal-to-noise ratio would be maximized and the orientation would be truly optimum. Experiments to test these hypotheses are outlined.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1964
Accession Number
AD0480592

Entities

People

  • George H. Hagn

Organizations

  • SRI International

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Broadcasting
  • Couplings
  • Dipole Antennas
  • Direction Finding
  • Electromagnetic Wave Propagation
  • Electrons
  • Geometry
  • Magnetic Fields
  • New York
  • Orientation (Direction)
  • Polarization
  • Radiation
  • Radiation Patterns
  • Radio Waves
  • Sky Waves
  • Wave Propagation

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.
  • Space/Atmospheric Physics.