HF (High Frequency) Propagation

High Frequency (HF) propagation refers to the way radio waves in the HF frequency range (3 to 30 MHz) travel through the atmosphere. Unlike lower frequencies, HF waves can bounce off the ionosphere, a layer of charged particles in the Earth's atmosphere. This ability allows HF signals to cover vast distances, making them ideal for long-distance communication, such as maritime and aviation communication. Conditions like time of day and solar activity can affect HF propagation, influencing how well signals can be transmitted and received.