What is a rf connector, Micro-coaxial cable, Cellular phones, electrical connector

 U.FL Series 6 GHz 50 Ohm Receptacle Male Pin Ultra-Small Coaxial Connector

https://www.futureelectronics.com/p/interconnect--connectors-rf--bnc-connectors/u-fl-r-smt-1-10-hirose-electric-5324728