Here are some names we give to radio bands. These names are somewhat dated, as even “high” frequency is pretty low. Low Frequency (LF) (30 kHz to 300 kHz) Med

Here are some names we give to radio bands. These names are somewhat dated, as even “high” frequency is pretty low. Low Frequency (LF) (30 kHz to 300 kHz) Medium Frequency (MF) (300 kHz to 3 MHz) High Frequency (HF) (3 MHz to 30 MHz) Very High Frequency (VHF) (30 to 300 MHz) Ultra High Frequency (UHF) (300 MHz to 3 GHz) HF is used by amateur radio operators to communicate around the world, and has sufficient bandwidth to carry voice or low speed data (300 bits per second). Commercial airliners use HF over the oceans too. Probably some military stuff too. Most other radios on the planet is operating on a higher frequency, in VHF/UHF or higher. As for power, 100 watts is enough to send an HF signal around the globe. Commercial AM radio stations might operate up to 50,000 watts, so a megawatt is a lot more.