Utilization as RF-Antennas of Live and of Lifeless Structures in Natural and in Man Made Jungles

Abstract

Natural forest trees, man-planted shade trees, metal lantern poles and building structures were used as efficient HF radio antennas with the aid of Hybrid Electromagnetic Antenna Couplers (HEMAC's). The performance of live trees and of inanimate metal structures as antennas is compared with the performance of conventional HF whip and dipole antennas. Similar practical data are given on the LF radio signal emission capabilities of hugh steel-concrete buildings and on LF radio signal diffusion via electrical power and water distribution systems in suburban areas.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1973
Accession Number
AD0763887

Entities

People

  • Kenneth J. Murphy
  • Kurt Ikrath
  • William Kennebeck

Organizations

  • United States Army Communications-Electronics Command

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Antenna Couplers
  • Antennas
  • Concrete
  • Diffusion
  • Dipole Antennas
  • Dipoles
  • Emission
  • Materials
  • Measurement
  • Radiation
  • Radiation Patterns
  • Radio Signals
  • Radio Transmission
  • Radio Transmitters
  • Radio Waves
  • Sky Waves
  • Transmitters

Fields of Study

  • Engineering

Readers

  • Forest Ecology
  • Phased Array Antenna Design.
  • Radio communications and signal processing.