A Method of Predicting the Interference Margin for Non-Directional Beacons.

Abstract

The purpose of this report is to describe a new method for determining the electric field strength produced by a Non-Directional Beacon (NDB) as a function of the important parameters involved which include distance, frequency, ground conductivity, and effective isotropic radiated power (EIRP). This method enables the determination of the coverage area within which the signal level from the NDB exceeds some critical value, usually 70 microvolts per meter (peak power). Applied to another NDB which might cause interference to the first, correcting for frequency difference to account for receiver selectivity, one can determine at any point the interference margin, (i.e., the amount by which the desired NDB signal exceeds the undesired and potentially interfering signal). This interference margin must be at least 15 dB for satisfactory operation. The scope of this report includes frequencies from 190 to 535 kHz. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1981
Accession Number
ADA110753

Entities

People

  • R. Luebbers
  • T. Mullins

Organizations

  • Ohio University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Beacons
  • Computations
  • Computer Programs
  • Electric Fields
  • Electrical Engineering
  • Engineering
  • Equations
  • Frequency
  • Ground Control Stations
  • Plastic Explosives
  • Radiation
  • Radio Beacons
  • Sky Waves
  • Stations
  • Transmitters
  • United States
  • Wave Propagation

Readers

  • Control Systems Engineering.
  • Plasma Physics / Magnetohydrodynamics
  • Radar Systems Engineering.