The SMA coaxial RF connector was originally designed in the 1960s by the Bendix Scintilla Corporation and Omni-Spectra Corporation. The torque required is typically 8 inch pounds. Special torque spanners are available to enable them to be tightened to the correct tightness, allowing a good connection to be made without over-tightening them. The connectors have a threaded outer coupling interface that has a hexagonal shape, allowing it to be tightened with a spanner. It is often used for providing RF connectivity between boards, and many microwave components including filters, attenuators, mixers and oscillators, use SMA connectors. It finds many applications for providing connectivity for RF assemblies within equipments where coaxial connections are required. The SMA connector is a sub-miniature coaxial cable connector and it takes its name from the words Sub- Miniature A connector. They have a different diameter and cannot mate with SMA connectors - they would need a special adaptor and then there would be an impedance mismatch. These domestic connectors are called F type coax connectors and they have a 75Ω impedance.
#Electrical symbol for female coaxial connector tv#
SMA connectors on a PCBĪlthough SMA connectors look very similar to the standard household connectors used for domestic satellite TV and other similar applications.
Its sub-miniature size also enables it to be used, even within relatively small items of electronic equipment.Īlthough now well established, the SMA connector is likely to see its use extended as many new RF systems see their operating frequencies extending well into the microwave region.
The SMA connector comes in a variety formats, male, female, straight, right-angled, bulkhead fitting and many more enabling it to meet most requirements. The SMA connector is a semi-precision sub-miniature RF and microwave connector that is extensively used, especially for RF connections within electronic systems for frequencies up to 18 GHz and sometimes more. Related connector types: Other connectors RF connectors RF connector specifications BNC connector TNC connector N-type connector SMA connector SMB connector MCX connector Precision connectors UHF connector F-type SMA RF Connector The SMA connector is an effective sub-miniature RF and microwave connector that has a screw fixing to provide reliable connectivity.
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