Antennas have been around for a long time. Before the birth of cable television, homes would need it to just to get a signal. The person would need to put this on the roof and adjust it from time to time to get better reception. Satellite television has also changed this making these crude yet useful devices obsolete.
The computer age has followed suit. There was a time that an individual had to dial up just to get an internet connection. With the development of wireless routers that come with a WiFi antenna, work using the computer can be done without the need to connect any wires.
Another term that is used for Wifi antennas are omnidirectional antennas. Some users who have this at home have said that it is better to have this replaced with a different kind. This is because the current antenna has difficulty reaching long distances since the signaling power needs to extend in many directions.