Dr.A.P.J.Abdul Kalam University BE VII SEM ALL BRANCH Satellite Communication [EC702] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University

Bachelor of Engineering

Seventh Semester Main Examination, Dec-2020

Satellite Communication [EC702]

Branch: EC

Time: 3:00 Hrs Max Marks 70

Note : 1. Attempt any five questions out of eight.

           2. All question carry equal marks.

Q.1 (a) What is polarization of an antenna? Also explain linear polarization and elliptical polarization.

(b) Describe and explain different steps involved in launching a Geostationary satellite.

Q.2 (a) Define Apogee and perigee.

(b) Define Kepler’s laws of orbiting bodies and derive an equation to show the third law is true

for any orbiting satellite.

Q.3 (a) How does the earth coverage provided by a satellite depend upon its altitude?

(b) Explain sun transit outage.

Q.4 (a) Explain TDMA frame structure and synchronization in TDMA network?

(b) Distinguish between multiple accesses and multiplexing.

Q.5 (a) Why is it preferable for a remote sensing satellite to be in a sun-synchronous orbit?

(b) Describe the characteristics and uses of geostationary orbit.

Q.6 (a) With the help of block schematic explain in detail TT and C (Tracking, Telemetry and

Command) Subsystem.

(b) What are the factors that affect the link design of a satellite?

Q.7 (a) What is antenna gain to noise temperature (G/T) ratio. What is the significance of Earth

stations antenna gain to noise temperature ratio?

(b) Mention the services available from DBS system?

Q.8 (a) Why thermal control is used in space segment?

(b) What are the important components of an earth station?

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