SMA Connectors are rated to around 18 GHz and are commonly found in UHF RF circuitry. Their compact size makes them useful for inter module connections.
Reversed Polarity (RP-SMA) versions of the connector swap the gender of the centre contact; so an RP male connector will have a female centre contact!
RP-SMA connectors are commonly used in WiFi equipment.
The table below illustrates the centre contact reversal found in the RP versions of the connector