Signal Propagation at 400 kHz Using an Oak Tree with a HEMAC as an Antenna

Abstract

A HEMAC (Hybrid Electromagnetic Antenna Coupler) is used to couple r- f energy in the medium frequency range (400-425 kHz) to an oak tree that is used as an antenna. A discussion of the measured impedance data and the effects of the nearby terrain are presented along with the conclusions reached.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1971
Accession Number
AD0735330

Entities

People

  • Kenneth A. Skrivseth

Organizations

  • United States Army Communications-Electronics Command

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Amplitude Modulation
  • Antenna Couplers
  • Antennas
  • Background Noise
  • Directional
  • Electrical Properties
  • Frequency
  • Impedance
  • Medium Frequency
  • Modulation
  • New Jersey
  • Patent Applications
  • Standing Waves
  • Terrain
  • Transmitters
  • United States

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Forest Ecology
  • Microwave Engineering.