Transpoder

communication

Definition

Transponder

A transponder is an electronic devices that receives a signal and automatically transmits a different signal in response. The term comes from the combination of “transmitter” and “responder.”

Types

Transparent Transponder

Transparent Transponder

A transparent transponder receives a signal at one frequency (the uplink frequency) from a ground station. It amplifies the signal and converts it to a different frequency (the downlink frequency), and then retransmits it back to Earth.

Regenerative Transponder

Regenerative Transponder

A regenerative transponder is a type of satellite transponder that not only receives and retransmits signals but also demodulates the incoming signal to its baseband. This allows for error correction, noise reduction, and potential changes in modulation, leading to improved signal quality and communication flexibility.