- A wave whose frequency lies between 3 and 30 MHz, corresponding to wavelengths of 100 to 10 meters, respectively. These are decametric waves, and comprise the high frequency band. There may be other defined bands for shortwaves, such as approximately 1.5 to 30 MHz, approximately 1.6 to 30 Mhz, approximately 5.95 to 26.10 Mhz and so on. Also spelled short-wave. Its abbreviation is SW.
- acronym SW
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