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Syllabus Sections:-

6c Ground wave

6c.1 Recall that the ground wave has a limited range due to absorption of energy in the ground and that the loss increases with increasing frequency.

Ground wave losses due to absorption into the ground and the losses increase with frequency, so that the distance typically achieved using ground wave propagation decreases as the frequency increases.

Ground waves are those radio waves that are merely propagated from the transmitter and do not rely upon any refraction (reflection) from the ionosphere and are those that just hug the earth. By doing so their range is severely restricted due to the absorption of the radio energy into the ground and the losses increase with increasing frequency.

The greatest distances for ground wave propagation is over the sea where there are no physical obstructions.

The ground wave has its uses in what is called Radio Direction Finding where the location of a transmitter is located by reference to the direction of the ground wave signal.


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