Frequency Bands
Main article: Radio spectrum
| Frequency | Wavelength | Designation | Abbreviation[6] |
|---|---|---|---|
| 3–30 Hz | 105–104 km | Extremely low frequency | ELF |
| 30–300 Hz | 104–103 km | Super low frequency | SLF |
| 300–3000 Hz | 103–100 km | Ultra low frequency | ULF |
| 3–30 kHz | 100–10 km | Very low frequency | VLF |
| 30–300 kHz | 10–1 km | Low frequency | LF |
| 300 kHz – 3 MHz | 1 km – 100 m | Medium frequency | MF |
| 3–30 MHz | 100–10 m | High frequency | HF |
| 30–300 MHz | 10–1 m | Very high frequency | VHF |
| 300 MHz – 3 GHz | 1 m – 10 cm | Ultra high frequency | UHF |
| 3–30 GHz | 10–1 cm | Super high frequency | SHF |
| 30–300 GHz | 1 cm – 1 mm | Extremely high frequency | EHF |
| 300 GHz – 3 THz | 1 mm – 0.1 mm | Tremendously high frequency | THF |