On Board Antenna

Hi,

I want to buy 2.4GHz on Board Antenna for arduino Yun, but I don´t know the fabrication and the component code. Anyone can help me ?

Possibly this

Although there are quite a few threads on this topic if you use "yun external antenna" as a search term.

Also you could use an external USB wifi adaptor by loading up the drivers and using the USB host port.