- Reverse polarity SMA (RP-SMA or RPSMA) is a variation of the SMA WiFi antenna connectors which reverses the gender of the interface, as shown in Figures 1 and 2.
- The term “reverse polarity” here refers only to the gender of the connector’s contact pin, not in any way to the signal polarity. The female RP-SMA connector has the same external housing as a standard or conventional female SMA connector, which consists of an outer shell with the threads on the outside; however, the center receptacle is replaced by a male pin. Similarly, the RP-SMA male has threads on the inside like a conventional male, but has a center receptacle instead of the male pin in the middle.
- Normal SMA connectors are incompatible with RP-SMA connectors.
SMA and RP-SMA connectors are used to make coaxial cable assemblies for antennas which enable the user to mount their antenna in the best possible position for line-of-sight to the signal path.