75 ohms (95 ohm and other impedance specials also exist).
End launch and edge launch versions (for board I/O).Alternate finishes include non-reflective black chrome. Brass housings (offering cost savings, usually plated gold over nickel) versus stainless steel.Thick wall plugs/jacks (for energy transfer and strength at mating interface).External appearance may belie the various versions that include: SMAs are standardized per MIL-PRF-39012 and CECC 22110/111, but most production is outside of spec-coverage (e.g., 39012 does not include field replaceable versions), or does not need to meet spec-approval for commercial applications.
#Sma connector series#
Later, a smaller-than-OSM/SMA series was developed, termed OSSM and standardized as SSMA. Omni Spectra had copyrighted the term OSM, and therefore the OSM connector was designated by DSCC as SMA (for Subminiature Type A). MIL-spec documentation first occurred in 1965. This SMA earned the title of SuperSMA it was one of the first field-replaceable types and prompted industry usage of field-replaceable connectors for better performance and reliability, especially for hi-rel, medical, and aerospace applications.
In 1996, the three engineers were honored by the IEEE MTT-S with the prestigious Microwave Pioneer Award, saying that this was “an entirely new approach to microwave construction for broadband, compact assemblies to use in missiles and spacecraft, as well as for replacement of waveguide and bulky coax in conventional applications at all microwave frequencies.” The OSM (future SMA) established the foundation for the miniature microwave connectors that are used today.Ĭheal and McHenry, joined by Jim Kubota, who had been engineering manager at Omni Spectra, founded Southwest Microwave (SMI) in 1981, and developed an exceptional thick-walled SMA with uniquely stabilized Teflon that limited expansion at 165˚C to only about 0.001 inch at the interface. A significant step in the microwave industry occurred in 1962, when they left Bendix and formed Omni Spectra Inc., where an equivalent to the BRM was pursued as the OSM (for Omni Spectra Miniature), which they designed to have low VSWR (voltage standing wave ratio) through 26.5 GHz. John Bryant, James (Jim) Cheal and Vincent (Vince) McHenry in 1958 and began life as the BRM connector, an acronym for Bendix Research Miniature connector. The SMA was originally designed at Bendix Research Laboratories by Dr.
Adding in the value for cable assemblies, adapters, and housings that use SMAs could multiply that amount by several times. Worldwide, SMAs have the highest dollar sales of all coax connector types, with current annual connector sales estimated to exceed $300 million. This early, innovative design continues to serve microwave technologies into the 5G era and beyond.Īre you familiar with the SMA connector? Bet you don’t know all the hundreds of variations in use. Updated: July 12th, 2022 SMAs represent the most connector sales in the coax connector category. Top 10 Suppliers Series – European Survey.Note: These characteristics are typical and may not apply to all connectors. (For Beryllium copper contact only)īrass for male, Beryllium copper for female Specification SMA Connector Technical Characteristics Electricalĥ00 cycles min. PCB connectors (straight and right angle).Cable Connectors (straight and right angle) for flexible, semi-flex and semi-rigid cables.Standard and Reverse Polarity SMA connector have high quality and characterized by high durability, high mechanical stability, long service life and optimum electrical features. Various SMA connector are widely used in Telecommunication, GPS Vehicle Tracking System, Wireless LAN (WLAN or Wi-Fi), Microwave Components, Aero and precise testing instrumentation. SMA connector are available in various quality classes for different applications with different material options. SMA connector have a threaded interface and 50 ohm impedance.
The maximum frequency is 24 GHz, recommended frequency range up to 18 GHz. SMA connector is a precision coaxial connector for microwave applications.
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