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Adafruit Edge-Launch SMA Connector for 0.8mm / 0.031" Slim PCBs
This is a great connector for anyone doing RF work, when an SMA connector is required. It hugs the edge of a "half thickness" 0.031" thick PCB (or thinner!) and 'launches' off of the edge. We like these for their ease of soldering and low profile. Mates with any SMA plug, we also have an SMA to RP-SMA in case your antenna is RP-SMA
You can find an Eagle footprint for this part in the Adafruit Eagle Library, it's called SMA_EDGELAUNCH