|
Band name | abbr. | ITU band |
Frequency | Wavelength | Amateur |
Extremely low frequency | ELF | 1 | 3 - 30 Hz | 10,000-100,000 km | none |
Super low frequency | SLF | 2 | 30 - 300 Hz | 1,000 - 10,000 km | none |
Ultra low frequency | ULF | 3 | 300 Hz - 3 kHz | 100 - 1000 km | none |
Very low frequency | VLF | 4 | 3 - 30 kHz | 10 - 100 km | none |
Low frequency | LF | 5 | 30 - 300 kHz | 1 - 10 km | *2200 m |
Medium frequency | MF | 6 | 300 - 3000 kHz | 100 - 1000 m | *630, 160 m |
High frequency | HF | 7 | 3 - 30 MHz | 10 - 100 m | 80, 60, 40, 30, 20, 17, 15, 12, 10 m |
Very high frequency | VHF | 8 | 30 - 300 MHz | 1 - 10 m | *6, 4, 2 m |
Ultra high frequency | UHF | 9 | 300 - 3000 MHz | 10 - 100 cm | *70, 23, 13 cm |
Super high frequency | SHF | 10 | 3 - 30 GHz | 1 - 10 cm | *5, 3, 1.2 cm |
Extremely high frequency | EHF | 11 | 30 - 300 GHz | 1 - 10 mm | *6, 4, 1 mm |
*Amateur radio frequency allocations vary around the world. Several bands are common for amateurs worldwide, usually in the HF part of the spectrum. Other bands are national or regional allocations only due to differing allocations for other services, especially in the LF, MF, VHF, and UHF parts of the radio spectrum.
Radio waves are an important part of modern technology as they enable long-range communication, wireless information access, and exploration of the universe.
They have a wide range of applications, from broadcasting AM radio, FM radio, and Wi-Fi, cellular and satellite communication.
Additionally, they play a significant role in space exploration.