Reverse polarity connectors refer to situations where, for example, in a standard cable connector, the inner conductor is designed as a socket rather than a pin. Reverse polarity connectors are predominantly used in the WLAN sector and are offered in three series: Connectors of the R-SMA series feature a screw closure, are vibration-resistant, and can be used depending on the design at frequencies of up to 6 GHz. The wave impedance is 50 Ω.