A Wifi wireless antenna is an antenna that receives and transmits on 2.4GHz/2400MHz frequency.
A Wi Fi antenna is used for the reception and transmission of many different applications. The most popular use of a Wifi antenna is for internet signal. It is used to receive signals transmitted by your local government who provides free wireless internet signals.
Everyday, more and more local towns are providing free wireless internet. For example, if you walk to downtown in Chicago with your wireless enabled laptop, you can surf the net free because the local government provides free internet service.
Let's say you live a few miles outside the city limit, then your reception is not going to be good. You will need to use either a Wifi wireless grid antenna or Yagi antenna.
WAN stands for Wireless Area Network.
LAN stands for Local Area Network.
WLAN stands for Wireless Local Area Network.
The IEEE standard for wireless networking.