ON THE PROPAGATION OF VLF WAVES IN SOLIDS AND LIQUIDS

Abstract

Impedance, current distribution and radiation characteristics were measured on various types of antennas in air and in water in continuation of examinations on small self-resonant helical antennas. Two methods of determining the conductivity and dielectric constant of a dissipative medium with graphical evaluation are described as an example of applying measurements of frame antenna directivity patterns. Radio communication was reached between the mine of Schwaz and the mine of St. Gertraudi by means of a 1600 sqm frame antenna and a new low-noise receiving amplifier. Preliminary examinations were made for geoelectric ore examinations, and a measuring probe was built for drill hole examinations.

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Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1968
Accession Number
AD0687751

Entities

People

  • Chr. Grissemann
  • R. Lukavec
  • W. Bitterlich
  • W. Gradl
  • W. Kellner

Organizations

  • University of Innsbruck

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Amplifiers
  • Antennas
  • Capacitance
  • Electrical Properties
  • Electromagnetic Fields
  • Far Field
  • Ferrites
  • Frequency
  • Helical Antennas
  • Impedance
  • Low Noise
  • Magnetic Fields
  • Measurement
  • Measuring Instruments
  • Ores
  • Resonant Frequency
  • Wave Propagation

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Geotechnical Engineering.
  • Systems Analysis and Design