What is a transponder in satellite communication?

The term “satellite transponder” refers collectively to a transmitter-receiver subsystem on board the satellite that processes, amplifies and retransmits a range of frequencies (the transponder bandwidth) to another location/terminal/antenna on the earth.

How does the transponder works?

A transponder will send an identifying coded signal in response to a transmitted interrogation from a ground-based radar station. An air traffic controller can then view the identified blip on a screen and know who it is and provide direction to the flight crews maintaining adequate separation with other blips.

What are types of transponder?

There are three main types of transponders: A, C, and S. Transponder A: sends back a transponder code to ATC. Transponder C: sends a transponder code plus altitude information to ATC.

What are the two types of transponders?

What is meant by a transponder?

Definition of transponder

: a radio or radar set that upon receiving a designated signal emits a radio signal of its own and that is used especially for the detection, identification, and location of objects and in satellites for relaying communications signals.

How many transponders are in a satellite?

The Boeing 702 series of satellites, in contrast, can have more than 100 transponders, and with the use of digital compression technology each transponder can have up to 16 channels, providing more than 1,600 TV channels through one satellite.

What is the range of a transponder?

What is the range of Passive Transponders? Passive Transponders don’t need a power supply (such as a battery), they get their energy from an Electromagnetic Field, which is built into the reader. However, they can only be used within a range of 5 meters.

What is the difference between a satellite and a transponder?

A satellite contains multiple channels, called transponders, that provide bandwidth and power over designated radio frequencies. The transponder’s bandwidth and power dictate how much information can be transmitted through the transponder and how big the ground equipment must be to receive the signal.

What are the elements of transponder?

A transponder is typically composed of:

  • an input band-limiting device (an input band-pass filter),
  • an input low-noise amplifier (LNA), designed to amplify the signals received from the Earth station (normally very weak, because of the large distances involved),