High Frequency vs Low Frequency vs Medium Frequency: Understanding the Differences

High frequency (HF) refers to radio frequencies in the range of 3 to 30 MHz. These frequencies are used for long-distance communication and are able to penetrate the ionosphere, allowing for signal transmission around the world. High-frequency signals are often used for military and civilian communications, as well as for broadcasting.

What is low-frequency ?

Low frequency (LF) refers to radio frequencies in the range of 30 Hz to 3 kHz. These frequencies are used for communication over long distances, but are not able to penetrate the ionosphere like high-frequency signals. Low-frequency signals are often used for navigation and for communication with underwater devices.

What is medium-frequency ?

Medium frequency (MF) refers to radio frequencies in the range of 3 kHz to 30 kHz. These frequencies are used for communication over medium distances, and are able to penetrate buildings and other obstacles. Medium-frequency signals are often used for broadcasting and for communication with aircraft.