Transponder: meaning, definitions and examples

communication device

A transponder is an electronic device that receives and responds to a radio signal, often used in communication and navigation systems. It typically transmits a signal back, enabling identification, location tracking, or data transfer.

receiver, signal relay, transmitter

Examples of usage

• The aircraft's transponder relayed its position to air traffic control.

• Smartphone apps can utilize GPS transponders for location accuracy.

• The satellite's transponder ensures that signals reach the designated ground station.

• Transponders are crucial in electronic toll collection systems.