RP-SMA Cables (RESMA). The SMA in SMA connector is short for SubMiniature version A, and the RP in RP-SMA or the RE in RESMA connector is short for Reverse Polarity. It’s also worth noting that RP-SMA and RESMA connections tend to be used on WiFi antennas, whereas SMA connectors are usually found on 3G/4G/5G devices.
eBay