Wi-Fi is a wireless networking technology that employs RF or radio waves in the range of 2.4 Ghz or 5 Ghz to provides an ultra fast network communication to various devices such as PCs, mobile phones, printers, etc. Devices in a WiFi network are connected together wirelessly for the purpose of sharing resources and information. WiFi Antenna (WLAN antenna) is installed on wireless devices like WLAN AP to reinforce signal strength.