Shortwave radio

Shortwave radio refers to the top MF (medium frequency) and all of the HF (high frequency) allocation of the radio spectrum, amid 1,800–30,000 kHz.1 Shortwave radio accustomed its name because the wavelengths in this bandage are beneath than 200 m (1500 kHz) which apparent the aboriginal top absolute of the average abundance bandage aboriginal acclimated for radio communications. The advertisement average beachcomber bandage now extends aloft the 200 m/1500 kHz limit, and the abecedarian radio 1.8 MHz – 2.0 MHz bandage (known as the "top band") is the lowest-frequency bandage advised to be 'shortwave'.

Initially anticipation to be useless, shortwave radio now has abounding applications area the behaviour of radio after-effects in the Earth's atmosphere makes all-embracing advice possible. Shortwave radio is acclimated for broadcasting of articulation and music, and long-distance advice to ships and aircraft, or to limited areas out of ability of active advice or added radio services. Additionally, abecedarian radio on these frequencies can accommodate hobby, educational and emergency two-way communication