1. “TRANSPONDERS IN SATELLITE”
MARUDHAR ENGG. COLLEGE
A SEMINAR REPORT ON
“TRANSPONDERS IN SATELLITE”

2. AGENDA SATELLITE HISTORY TYPES OF SETELLITE AND THEIR USES
COMPONENTS OF SATELLITE
TRANSPONDERS
CLASSIFICATION OF TRANSPONDERS
APPLICATIONS
CONCLUSION

3. SATELLITE HISTORY
1> Object which has been placed into orbit by human endeavour.
2> World's first artificial satellite, the Sputnik 1, launched
by the Soviet Union in 1957
3> It helped to identify the density of high atmospheric layers
and provided data on radio-signal distribution in the ionosphere.
4> Ignited space race between Soviet Union and the United States.
5> Sputnik 2 was launched on November 3, 1957 and carried the first
living passenger into orbit, a dog named Laika.
6> 6,578 satellites launched into orbit since 1957.

4. NEED OF SATELLITE
1> Two Stations on Earth want to communicate through radio
broadcast but are too far away to use conventional means.
2> Two stations can use a satellite as a relay station for
communication.
3> One Earth Station sends a
transmission to the satellite.
This is called a Uplink.
4> The satellite Transponder
converts the signal and
sends it down to the second
earth station.
This is called a Downlink.

5. TYPES OF SATELLITE AND APPLICATION
SATELITES BASED UPON ALTITUDE:
LEO (Low Earth Orbit )
MEO (Medium Earth Orbit )
GEO (Geostationary Earth Orbit)
SATELLITES ARE USED FOR A LARGE NUMBER OF PURPOSES:
military and civilian Earth observation satellites
communications satellites
navigation satellites
weather satellites and
research satellites.

6. BASIC BLOCKS
transponder
BSIC COMMUNICATION SATELLITE COMPONENTS

7. Interesting, right?
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