1. Frequency range used in lab?

2-4GHz which falls in S band.

2. General frequency range?

C and KU band

C band=6/4 GHz

Ku band=14/11GHz

3. What type of antenna is used in lab?

Helical type of antenna is used in lab.

4. C/N ratio of a satellite link?

C/N = [EIRP]+[G/T]-[LOSSES]-[k] dBHz

[C/N]u = [EIRP]u + [G/T]u – [LOSSES]u – [k]

[C/N]d = [EIRP]d + [G/T]d – [LOSSES]d – [k] – [B]

5. Why uplink frequency greater than downlink frequency?

Attenuation is more

6. What is the bandwidth of S-Band?

27 MHz

7. What is the antenna used in the earth station?

Aperture antenna, parabolic antenna, cassegrain antenna

8. Antennas used in Space craft?

Directional antennas

9. What is the use of satellite link?

Satellite link is used for the transmission of point to multipoint link.

10. Who launched the first satellite? When?

SPUTNIK by USSR in 1957

11. INTELSAT I– 1965

INTELSAT II– 1966

INTELSAT III- 1968

INTELSAT IV - 1971

INTELSAT IV - 1975

INTELSAT III- 1980