What this RP-SMA adapter does in the signal path
The Hirose SMA(R)-A-PP is a straight RP-SMA plug-to-plug adapter with female-to-female center contacts, designed to join two RP-SMA male-terminated cables or components in a 50 Ohm system. It carries a frequency rating to 18 GHz, making it suitable for microwave test setups, antenna feeds, and RF module interconnects where the signal must pass through without a permanent splice. The gold-plated brass center contacts and passivated stainless steel body maintain consistent impedance through the junction and resist corrosion in field or lab environments. Rated for 1000 mating cycles, this adapter handles repeated connect-disconnect duty in test benches or reconfigurable RF harnesses without degrading contact performance. The threaded coupling on both ends provides a vibration-resistant connection that stays tight under cable movement.
Construction and materials that matter for RF performance
The body is machined from stainless steel with a gold and passivated finish — the passivation layer adds corrosion resistance while the gold maintains low surface resistivity at the mating interface. Inside, the center contacts are brass with gold plating, a standard combination for RF connectors that balances conductivity with mechanical durability.