RP-SMA Male Input to 2 RP-SMA Female Output T-Type RF Connector Splitter

The SMA (SubMiniature Version A) and RP-SMA (Reverse Polarity SMA) connectors are prevalent types of coaxial connectors utilized in radio frequency (RF) communications. This article provides a comprehensive overview of both types.

1. SMA (SubMiniature Version A) Connector

Definition: SMA connectors are compact coaxial connectors engineered for superior performance across a broad frequency range, typically spanning from 0 to 18 GHz.
Applications: These connectors find widespread use in various applications such as radio systems, Wi-Fi antennas, microwave applications, radio transmitters, GPS systems, RF circuits, and high-frequency test equipment.
Design: SMA connectors are available in both male and female variants. The male connector features an outer threaded coupling and an inner pin serving as the center conductor. Conversely, the female connector has an inner socket for the center conductor and an outer threaded section to engage the male.
Advantages: SMA connectors offer low signal loss at high frequencies, boast a robust mechanical design, are compact, and have a broad range of applications.

2. RP-SMA (Reverse Polarity SMA) Connector

Definition: RP-SMA is a variation of the SMA connector that features reverse polarity. The mechanical design is modified, reversing the inner conductor's gender while maintaining the outer shell’s standard threading.
Difference: The primary distinction between SMA and RP-SMA connectors lies in the inner conductor's gender:
 

• SMA Male: Features outer threads and an inner pin.
• RP-SMA Male: Has outer threads and an inner socket (instead of a pin).
• SMA Female: Lacks outer threads and has an inner socket.
• RP-SMA Female: Does not have outer threads but features an inner pin (instead of a socket).

Applications: RP-SMA connectors are extensively used in Wi-Fi antennas, wireless routers, Bluetooth devices, and various RF applications. Manufacturers often use them to prevent users from connecting non-compliant antennas.
Regulation: Reverse polarity is frequently used to ensure devices comply with regulatory standards, such as those set by the FCC, by preventing the use of incompatible antennas.

Summary

The SMA Connector has standard polarity, with the male featuring a pin and the female featuring a socket. It is widely used in a variety of RF applications. On the other hand, the RP-SMA Connector has reverse polarity, with the male featuring a socket and the female featuring a pin. It is commonly found in Wi-Fi applications and is designed to prevent the use of incorrect antennas. Both connectors provide reliable, low-loss connections at high frequencies. However, RP-SMA adds a compatibility control layer by reversing the inner conductor's gender.