An Engineering Feasibility Study of Communications via a Subterranean Waveguide.
Telecommunications research and engineering rept.,
OFFICE OF TELECOMMUNICATIONS BOULDER CO INST FOR TELECOMMUNICATION SCIENCES
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The report considers the signal strength at a point in a subterranean waveguide and compares it with the noise one might expect. Noise that is owing to atmospheric and subsurface thermal sources. The signal is due to a transmitting antenna located in the waveguide. A prediction is thus made on signal-to-noise ratio at the receiving point. The prediction permits an engineering estimate of the likely distance one could communicate via this subterranean waveguide, based on assumed waveguide parameters. Author
- Radio Communications