SMB connector
- details and information about the SMB connector - a useful RF connector-
including the SMB socket and plug, SMB adapters and links to suppliers.
The SMB connector derives its name as it is termed a Sub-Miniature
version B connector. It was developed as a result of the need for a
connector that was able to connect and disconnect swiftly. It does not require
nuts to be tightened when two connectors are mated. Instead the connectors are
brought together and they snap fit together. Additionally the connector utilizes
an inner contact and overlapping dielectric insulator structures to ensure good
connectivity and a constant impedance.
The SMB connector is not as robust as the SMA connector, and
although they perform well under moderate levels of vibration, they are not
suitable for harsh environmental conditions where the levels of vibration rise.
SMB connector impedance
The SMB connector is specified in tow impedances, namely 50
and 75 ohms. The 50 ohm version of the SMB connector is generally specified up
to 4 GHz, but the 75 ohm versions of the SMB connector are normally only
specified to 2 GHz.
SMB applications
SMB coaxial connectors are not as widely used as their SMA
counterparts. They are used for inter board or assembly connections within
equipment, although they are not widely used for purchased microwave assemblies
in view of their inferior performance.
Summary
Although the SMB connector is not as widely used as its SMA
cousin, large quantities are nevertheless used. The connector is much easier to
connect and this can be a distinct advantage in applications where its
performance is sufficiently good. As a result the SMB connector is a very
successful design and used for many applications.
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