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Type N connector (female) The N connector (in full, Type N connector) is a threaded, weatherproof, medium-size RF connector used to join coaxial cables. It was one of the first connectors capable of carrying microwave-frequency signals, and was invented in the 1940s by Paul Neill of Bell Labs, after whom the connector is named. 1 Design.
1 Male connectors have the center wire sticking out, while female connectors have a space for the center wire to stick into. 2  Be sure to use the opposite gender to the connector you will be making. 3  Most cables end in male connectors. 4  Use an SMA (sub-miniature Version A) connector for very small coaxial cable. Be sure to use the opposite gender to the connector you will be making. 2  Most cables end in male connectors. 3  Use an SMA (sub-miniature Version A) connector for very small coaxial cable.