What is the primary function of antennae in radio communication?

The primary function of antennae in radio communication is to convert electrical signals into radio waves and vice versa. This conversion process is fundamental to the operation of radio communication systems. When an electrical signal, typically an alternating current (AC), is applied to an antenna, it creates electromagnetic waves that propagate through the air as radio waves. Conversely, when radio waves strike the antenna, they induce an electrical signal in it, which can then be processed by radio receivers.

This dual role of antennas – transmitting information as radio waves and receiving those waves to recover the original signals – is crucial in enabling wireless communication. An understanding of this function helps clarify why antennas are essential components in various applications such as broadcasting, telecommunications, and even in newer technologies like wireless internet and satellite communications.