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Provision No. 2.1 of the ITU Radio Regulations states:
2.1 The radio spectrum shall be subdivided into nine frequency bands, which shall be designated by progressive whole numbers in accordance with the following table." [1]
These bands are:
| Band Number | Symbols | Frequency Range | Wavelength Range | Typical sources |
|---|---|---|---|---|
| 1 | ELF | 3 to 30 Hz | 10,000 to 100,000 km | deeply-submerged submarine communication |
| 2 | SLF | 30 to 300 Hz | 1000 to 10,000 km | submarine communication, ac power grids |
| 3 | ULF | 300 to 3 kHz | 100 to 1000 km | earth quakes, earth mode communication |
| 4 | VLF | 3 to 30 kHz | 10 to 100 km | near-surface submarine communication, |
| 5 | LF | 30 to 300 kHz | 1 to 10 km | AM broadcasting, aircraft beacons |
| 6 | MF | 300 to 3000 kHz | 100 to 1000 m | AM broadcasting, |
| 7 | HF | 3 to 30 MHz | 10 to 100 m | Skywave long range radio communication |
| 8 | VHF | 30 to 300 MHz | 1 to 10 m | FM radio broadcast, television broadcast, DVB-T, MRI |
| 9 | UHF | 300 to 3 GHz | 10 to 100 cm | microwave oven, television broadcast, GPS, mobile phone communication (GSM, UMTS, 3G, HSDPA), cordless phones (DECT), WLAN (Wi-Fi), Bluetooth |
| 10 | SHF | 3 to 30 GHz | 1 to 10 cm | DBS satellite television broadcasting, WLAN (Wi-Fi), WiMAX, radars |
| 11 | EHF | 30 to 300 GHz | 1 to 10 mm | directed-energy weapon (Active Denial System), Security screening (Millimeter wave scanner), intersatellite links, WiMAX, high resolution radar |
References
- ^ ITU Radio Regulations, Volume 1, Article 2; Edition of 2004
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