In computer networking, a wireless LAN access points are devices that allow wireless devices to connect to a wired Ethernet network using Wi-Fi, or related standards. Wireless access point products usually connect to a router (via a wired network) as a standalone device, but it can also be an integral component of the router itself. Wireless LAN access points act a lot like cellular phone towers: you can move from one location to another and continue to have wireless access to a network.
Wireless LAN antenna products work by sending radio transmissions on specific frequencies where listening devices can receive them. The connection range of a Wi-Fi device depends greatly on its antenna's power gain. The necessary radio transmitters and receivers are built into Wi-Fi enabled equipment like routers, laptops and phones. Wireless antennas are also key components of these radio communication systems, picking up incoming signals or radiating outgoing Wi-Fi signals. Some wireless LAN antennas, particularly on routers, may be mounted externally while others are embedded inside the device's hardware enclosure.