transponder

/trænˈspɒndə(r)/ (bre, ipa) · [trænspˈɑndɚ] /trænˈspɑːndər/ (ame, ipa) · [trænspˈɑndɚ] /tran(t)-ˈspän-dər How to pronounce transponder (audio)/ (ame, mw)

transponder — noun

  • transpondersingular
  • transpondersplural

1. a small electronic unit that listens for an incoming radio message and automatic

1.名詞B2
釋義

a small electronic unit that listens for an incoming radio message and automatically replies with a different signal, often used in aircraft, satellites, or road tolls to show position or pass along information

例句

The pilot checked that the plane's transponder was sending the correct code before takeoff.

transponder + sending + code (common in aviation)

Satellites use transponders to receive signals from one ground station and send them to another location.

transponder receives and sends signals (relay function)

同義詞
  • beacon

    a beacon continuously broadcasts a signal for guidance, whereas a transponder only replies when triggered

  • responder

    more general term for any device that replies to a signal, but less common in everyday technical use

用法筆記

Often appears in compound nouns: transponder signal, transponder code, transponder system.

常見錯誤

❌The plane's transmitter answered the tower.
✅The plane's transponder answered the tower.
💡a transmitter only sends; a transponder both receives and replies.