Earth-ionosphere waveguide

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<div class="definition"><div class="short_definition">The physical structure formed by the conductive earth and the conductive  lower [[ionosphere]] ([[D region]]) that together sandwich the highly resistive [[atmosphere]]  between them.</div><br/> <div class="paragraph">This [[waveguide]] sustains global [[electromagnetic wave]] propagation from the lower end of the  [[Schumann resonance]] band (5 Hz) to the waveguide cut-off [[frequency]] near 1500 Hz, beyond  which the [[radiation]] will not be retained within the waveguide.</div><br/> </div>
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<div class="definition"><div class="short_definition">The physical structure formed by the conductive earth and the conductive  lower [[ionosphere]] ([[D-region|D region]]) that together sandwich the highly resistive [[atmosphere]]  between them.</div><br/> <div class="paragraph">This [[waveguide]] sustains global [[electromagnetic wave]] propagation from the lower end of the  [[Schumann resonance]] band (5 Hz) to the waveguide cut-off [[frequency]] near 1500 Hz, beyond  which the [[radiation]] will not be retained within the waveguide.</div><br/> </div>
 
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Latest revision as of 18:51, 25 April 2012


[edit] earth–ionosphere waveguide

The physical structure formed by the conductive earth and the conductive lower ionosphere (D region) that together sandwich the highly resistive atmosphere between them.

This waveguide sustains global electromagnetic wave propagation from the lower end of the Schumann resonance band (5 Hz) to the waveguide cut-off frequency near 1500 Hz, beyond which the radiation will not be retained within the waveguide.

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