duplexer

This term is a specialized technical noun used primarily in radio frequency (RF) engineering and telecommunications. It describes a hardware component that enables full-duplex communication, allowing a device to send and receive signals at the same time without the transmitter overwhelming the sensitive receiver circuitry.

In professional contexts, it is often distinguished from a "multiplexer," which combines multiple signals into one channel, whereas a duplexer specifically manages the bidirectional flow of a single communication link. It is almost exclusively used in technical manuals, engineering specifications, and electronics documentation.