BNC:stands for Bayonet Neill-Concelman (named after designers Paul Neill and Carl Concelman). It is a coaxial connector especially suitable for RF cable applications up to 4 GHz. The connectors feature a "bayonet" retention that prevents accidental disconnection when the cable is moved or pulled. It also provides constant impedance across the connector.
multinational:a threaded version of the BNC connector, threaded Neill-Concelman outperforms bayonet connectors at microwave frequencies. The micro unit is weatherproof and operates up to 12 GHz. They are most commonly used in cellular phones and RF/antenna connections to address stability issues.
SMEs:Subminiature version B (SMB) is a smaller version of the SMA connector. SMB is one of the more widely used applications of RF/microwave connector variants for industrial and telecom equipment. They feature a simple snap-on coupling design for infrequently connected semi-rigid cables and offer excellent electrical performance from DC to 4 GHz.
7/6 Standard:The 7/16 DIN connector (used in Germany, Deutsches Institut für Normung) is another RF connector. It is threaded for high power transmission applications such as cellular networks and antenna systems with multiple transmitters. It can be used up to 7.5 GHz and requires a wrench to tighten.
MCX:Miniature coaxial connectors (MCX) are small connectors used in applications with size, space or weight constraints. Small connectors operating between DC and 6GHz can be used in wireless devices, TV tuner cards, digital cellular, RF hardware and GPS applications. They feature a snap-on coupling design for simple, tool-free installation.
SMA:SMA or "Subminiature Type A" is a coaxial RF connector with a threaded coupling design. While very similar to the popular F-type connectors installed in your home for cables and internet access, SMA is military specification and requires an adapter to be compatible with home connectors. SMA connectors are widely used in radio or WiFi antennas and microwave systems.
Quality Management Association
QMA ("quick mate") connectors are a variation of SMA connectors designed to snap and disconnect. This connector provides excellent performance up to 18 GHz. Since the RF wires are the same as the SMA series, the QMA connectors also offer the same high power handling capabilities.