What is the role of an antenna in a wireless LAN (WLAN)?
A. An antenna is a device used to transmitt or receive signals. Antennas convert electrical energy into radio frequency (RF) waves when it transmits, or RF waves into electrical energy when it receives. The size and shape of antennas are determined primarily by the frequency of the signal they are designed to receive. A high gain antenna is highly focused, whereas a low gain antenna receives or transmits over a wide angle. An antenna provides the wireless system with three fundamental properties: gain, direction, and polarization.
