SMA (SubMiniature version A) RF Connectors are compact and durable threaded coaxial connectors that provide secure, low-reflection connections for high-frequency applications. Standard SMA connectors operate up to 18 GHz while high-performance versions operate up to 26.5 GHz or 34 GHz. They have a 50 Ohm impedance. Common applications of SMA RF connectors include microwave systems, cellular antennas, GPS, test and measurement equipment, and defense systems.