The U.FL series is an ulta-small, surface mount coaxial cable. Weighing in at 15.7mg, it's board space occupancy has been reduced to 7.7mm(2).  And mating height to 2.4mm.  The frequency requirement allows for a maximum signal of 6 GHz.  The series has also been fitted with a tactile lock that provides feeling for confirmation of secured locking conditions.