noun
- electronic devices that receive signals and automatically transmit responses, used in radar, aircraft identification, and communication systems
Usage: technical; aviation; telecommunications
Examples
- Aircraft transponders help air traffic controllers track planes on radar.
- The satellite’s transponders relay television signals to Earth.
- Modern cars use transponders in their key fobs for security.
- Ships are required to carry transponders for identification at sea.
- The rescue team located the missing hikers using emergency transponders.
- Radio frequency transponders are embedded in many credit cards.
- Weather balloons carry transponders to transmit atmospheric data.