AirPort Antenna Connector

[Nermal]

I'm looking at getting an AirPort Extreme base, but will need to connect an antenna to it for the range I want. However, I can't find any information on what type of connector it is. Apple's site just says "antenna connector" which of course isn't very helpful.

So, what sort of connector is it? SMA? RP-SMA? Male or female?

Thanks

 

[VanMac]

Here is a site that explains in depth
http://www.vonwentzel.net/ABS/ExtendedExtreme/