MMCX 

50 Ohm MMCX micro-miniature connectors are one of the smallest RF connector series available. MMCX feature a snap together interface and are suitable for applications up to 6 GHz, they conform to CECC 22000 standards. The micro size footprint of MMCX makes them ideal for antenna and board connections where space or weight is critical.  Applications include GPS, Automotive, Telemetry, Medical and all Handheld devices.

For details; http://www.coax-connectors.com/products/connectors/mmcx.aspx