What frequency range does High Frequency (HF) cover?

High Frequency (HF) encompasses a frequency range from 3 to 30 MHz. This range is significant for various communication purposes, particularly for long-distance radio communications. HF waves can reflect off the ionosphere, allowing signals to travel beyond the horizon, which is essential for military operations and maritime communications.

Understanding the HF range is crucial as it distinguishes this band from others, like Very High Frequency (VHF) and Ultra High Frequency (UHF). This distinction impacts how different frequencies are utilized in communication systems and the effectiveness of those systems in different environments.