Arduino Yun Rev 2 External Antenna

Hello, i know there are some old topics of the given external antenna slot.

The most ridden solution was to use an USB-external antenna, but i really need the given slot on board.

Now the question: Can anybody tell me what Type this is?

I need a connector from the type on board to SMA. female to female

The connector type is U.FL. The tricky thing about this connector type is that since "U.FL" is a trademarked name, every manufacturer had to come up with a different name for the same connector. So U.FL is the most common name used, but you can find 100% compatible connectors sold under a variety of other names:

The U.FL to SMA pigtails are widely available.