An RF connector (radio frequency connector) is a 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 line impedance at the connection in order to reduce signal reflection and power loss. As the frequency increases, transmission line effects become more important, with small impedance variations from connectors causing the signal to reflect rather than pass through. An RF connector must not allow external signals into the circuit through electromagnetic interference and capacitive pickup.

A circular connector is a cylindrical, multi-pin electrical connector that contains contacts that power electrical devices, transmit data, or transmit electrical signals.

A circular connector is designed to withstand harsh environments and reliably deliver data.

A connector is a device that terminates a segment of cabling or provides an entry point for network devices such as computers, hubs and routers.

These can in turn be differentiated according to their external appearance and connection characteristics. For example, there are plugs or sockets and ports.

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