Tuesday, April 27, 2021

Shortwave (SW)

Shortwave (SW) radio includes the entire High Frequency (HF) band.

Radio waves in the shortwave band can be reflected or refracted from a layer of electrically charged atoms in the atmosphere called the ionosphere. Therefore, short waves directed at an angle towards the sky can be reflected back to Earth at great distances, beyond the horizon.

Shortwave radio is used for broadcasting of voice and music to shortwave listeners over very large areas; sometimes entire continents or beyond. Other uses include military over-the-horizon radar, diplomatic communication, amateur radio, education, and emergency service, as well as for long-distance aviation and marine communications.
Shortwave (SW) frequency range High Frequency (HF)

Band    Frequency Range
120 m   2.3–2.495 MHz
 90 m    3.2–3.4 MHz
 75 m    3.9–4 MHz
 60 m    4.75–5.06 MHz
 49 m    5.9–6.2 MHz
 41 m    7.2–7.6 MHz
 31 m    9.4–9.9 MHz
 25 m    11.6–12.2 MHz
 22 m    13.57–13.87 MHz
 19 m    15.1–15.8 MHz
 16 m    17.48–17.9 MHz
 15 m    18.9–19.02 MHz
 13 m    21.45–21.85 MHz
 11 m    25.6–26.1 MHz

Mediumwave (MW) frequency range Medium Frequency (MF)

530-1.700 Khz

Longwave (LW) frequency range Low Frequency (LF)

148.5–283.5 kHz

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