It mates by screw-coupling to provide a stable, weatherproof connection that is resilient against vibrational forces. The SMA connector was developed in the late 1950s and is still manufactured to its military specifications (MIL-STD-348). It supports reliable broadband performance with low reflection. This widely used miniature, semi-precision threaded connector is reputed for its performance at microwave frequencies and particularly in cellular and wireless networking applications. The Voltage Standing Wave Ratio (VSWR) is 1.3.The maximum frequency of the FME connector is 2000 MHz (2 GHz).The FME connector has an impedance of 50 Ohms.It carries a receptacle that is made from phosphor bronze.Įlectrical specifications of the FME connector The marked protrusion of its Teflon or Delrin dielectric is distinctive and gives the connector its nipple connectorname. The female FME connector is also made from nickel-plated machined brass and has a diameter of 0.276 inches (7 millimeters).Within the connector, the male pin is made from gold-plated brass and sits with a recessed Delrin insulator. It carries a hex nut that may assist in tightening the connector. It is made from machined brass that is nickel plated. The male FME connector is a barrel-shaped connector with threading that is internalized.The male and female connectors mate by screw-coupling and are rated for over 500 mating cycles. Physical specifications of the FME connectorįME connectors are threaded connectors with threading that has threading has an 8mm (M8) by 0.75 mm pitch. It is united for its small and compact dimensions that, when coupled with small diameter flexible coax, allows easy routing within channels and spaces. These miniature connectors were developed for mobile applications, like vehicles or portable devices where they will potentially encounter jolts, impacts, and vibrations that could cause disengagement or damage to the connection of radio frequency circuit components. The FME connectorįME connectors are also known as SAP or nipple connectors. These 50-Ohm adapters are mated to the SMA connector at one end and the FME connector by screw-coupling as with the regular connectors. With an FME to SMA adapter, the utility and flexibility of antenna and networking installations are increased across the main application of the key classes of connectors. They increase interconnectivity between antennas, cables, and radio frequency devices that use either the SMA connector or FME connector. In-line, the adapter unit is straight at both connecting ends.įME to SMA adapter are impedance matched and fabricated to provide a physical and electrical connection that will not create discontinuities in your radio frequency circuit.Between-series, meaning that these adapters make a connection between two different types of connectors (rather than connectors of the same type but differing genders).FME to SMA adaptersįME to SMA adapters are radio frequency connector adapters that facilitate mating between FME and SMA connectors. The physical features of the FME connector in particular are specifically designed for this task as we discuss further on. The combination of coaxial cable and connectors in these cables is therefore advantageous for installation in enclosed environments where the cable has to be routed for installation. Coaxial cable types used include LMR 100, RG 195, and RG 58. Pre-assembled cables use a length of high-quality, flexible coax that keeps signal loss to a minimum. The connector geometry may also vary with the inclusion of right-angle connectors which provide a reduced footprint, compact mating, and less tension on the attached cable than straight bodied connectors. The connectors used may vary in the combination of gender (for example SMA male to FME male or FME female to SMA female) as required. They may be used for connection of FME antennas or SMA antennas as well as making connections within and between pieces of cellular and wireless equipment. An FME to SMA antenna cable is a coaxial cable assembly that is terminated by a For Mobile Equipment (FME) radio frequency connector at one end and a Sub Miniature version A connector at the other end.
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