1. An electronic device that allows two signals to be transmitted or received simultaneously over a single channel or medium, typically by separating them by frequency or time.
Usage: technical; telecommunications

Examples

• The diplexer in the satellite system enables simultaneous transmission and reception on the same antenna.
• Engineers installed a diplexer to combine the VHF and UHF signals into one cable.
• A diplexer separates incoming and outgoing signals so they don't interfere with each other.
• The diplexer allows the communication system to operate in full-duplex mode over a single line.