What Is Shortwave?

- Jun 21, 2018-

Shortwave is an antenna radio wave with a frequency from 3MHz to 30MHz. It propagates in the ground wave and sky wave mode. When the ground wave propagates, the earth strongly absorbs the wave, and the attenuation is large. The propagation distance is not over a dozen or so. Sky wave propagation At this time, one or more reflections of the ionosphere can be used to travel far away from the communication, which is greatly affected by the change of the ionosphere. The attenuation of the ground wave is fast and it is unstable when the sky propagates.

 

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