SMB connectors are coaxial RF connector

RF connector

A coaxial RF connector is an electrical connector designed to work at radio frequencies in the multi-megahertz range.RF connectors are typically used with coaxial cables and are designed to maintain the shielding that the coaxial design offers. Better models also minimize the change in transmission...

s developed in the 1960s. SMB connectors are smaller than SMA connector

SMA connector

SMA connectors are coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw type coupling mechanism. The connector has a 50 Ω impedance. It offers excellent electrical performance from DC to 18 GHz.-Connector design:The SMA connector consists of...

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They feature a snap-on coupling and are available in either 50 Ω or 75 Ω impedance. They offer excellent electrical performance from DC to 4 GHz.

An SMB jack has a male center pin, whilst an SMB plug has a female basket.

Connectors are available for two SMB cable sizes:

1. Cable 2.6/50+75 S (3 mm outer / 1.7 mm inner diameter) and
2. Cable 2/50 S (2.2 mm outer / 1 mm inner diameter)

SSMB

The SSMB connector is a small version of the standard SMB connector with a 'snap-on' coupling.

1. Impedance: 50 Ohm
2. Operating frequency: DC-12,4 GHz

External links

• Image of SMB 50 Ω plug and jack illustrating the differences between the two genders
• Image of SMB and Mini SMB 75 Ω plugs
• Answer to a question about SMB connector genders