MCX connector

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MCX plug
MCX plug

MCX connectors are coaxial RF connectors developed in the 1980s. They have the same inner contact and insulator dimensions as the SMB connector but are 30% smaller. MCX is standardized in European CECC 22220.

They use a snap-on interface and usually have a 50 Ω impedance. They offer broadband capability from DC to 6 GHz.

This type of connector is used on the Apple Airport Extreme Base Station's external antenna port and requires an adapter for most antennas.