Re:Practical Radio Circuits (2003) [pdf]
by wbl on Friday November 08, 2024 @02:19PM
(#42089671)
You end up exciting the ionosphere this way so it's regulated. But there is a band way down there to play with if you have your ticket.
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Re:Practical Radio Circuits (2003) [pdf]
by carltg_ on Friday November 08, 2024 @03:57PM
(#42090416)
While 9kHz[3e-7/cm] (for an earth mode radio example) is lower than the plasma frequency of the ionosphere, 9MHz[3e-4/cm] (critical so that the ionosphere acts as a waveguide), would this be significantly lower, and hence have a high attenuation--a large imaginary component to the refractive index? If so, would this excite the ionosphere? Genuinely curious