The N “Navy” series connector, also known as Type-N or N-Type, was originally designed for military communications.
The N connector remains one of the most commonly used RF connector in circulation. Within the cellular telecommunications industry its usage is however being phased out, with restrictions preventing it from being used in DAS and IBC systems. It is widely becoming replaced by the newer 4.3-10 series connector.
N connectors have a 5/8 – 24 UNEF threaded coupling and are often considered weatherproof for low frequency applications, however lack of internal gaskets make weatherproofing necessary for reliable operation. Most N connectors operate up to 3 GHz, however high performance and precision variants allow up to 18 GHz.