SELECTED EXAMPLES OF VHF SIGNAL PROPAGATION RECORDS IN TROPICAL TERRAINS

Abstract

Slow-speed chart records of received signal strength showing the perturbations caused by scattering from trees in the VHF band are presented. Data for several frequencies and polarization of transmitting and receiving antennas (simple dipoles and standard AN/PRC-25 manpack-set whips) are included, as well as a variety of combinations of clearings, jungle terrain, rubber plantations, and bamboo. The records permit a qualitative evaluation of the magnitude of signal fading that is superimposed upon the smooth decrease of received signals with distnce between transmitter and receiver. Some similar results are presented for an AN/PRC-25 manpack system using AT-271/PRC antennas.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1967
Accession Number
AD0672070

Entities

People

  • Edwin M. Kreinberg
  • Nicholas K. Shrauger

Organizations

  • SRI International

Tags

DTIC Thesaurus Topics

  • Asia
  • California
  • Classification
  • Continents
  • Contracts
  • Frequency
  • Geographic Regions
  • Perturbations
  • Polarization
  • Scattering
  • Security
  • Southeast Asia
  • Thailand
  • Transmitters
  • Transmitting
  • Very High Frequency

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Radio communications and signal processing.
  • Urban Planning and Geography.