Maharashtra State Board of Technical Education 2009 Diploma Energy Engineering for Satellite & RADAR Communication - Question Paper

Sample Test Paper
Course Name : Electronics and Video Engineering
Course Code : EV
Semester : Sixth
Subject : Satellite and RADAR Communication
Marks : 20 Time: one Hour
Instructions:
1. All ques. are compulsory.
2. Illustrate your answers with neat sketches wherever necessary.
3. Figures to the right indicate full marks.
4. presume suitable data if necessary.
5. Preferably, write the answers in sequential order.
Q.1 Attempt any 4 of subsequent. 16 Marks
a) List various factors influencing maximum RADAR range.
b) describe elevation and azimuth angles of a satellite & show with neat sketch.
c) provide 4 advantages of geosynchronous satellite.
d) discuss the operation of basic RADAR system with the help of a block diagram.
e) elaborate RADAR beacons? provide its 2 applications.
f) describe footprint, orbital drift, attitude control and eclipse effect with respect to
satellite.
Q.2 Attempt any 3 of subsequent. 12 Marks
a) discuss with the help of neat block diagram how power is generated and
distributed to various parts of satellite subsystem.
b) discuss how three-axis stabilization is achieved for satellite in space.
c) Which are the factors responsible for drift in geostationary orbit of satellite? How
it is corrected?
d) discuss the operation of CW Doppler RADAR using an IF amplifier in the
receiver. provide drawbacks of basic CW RADAR system.
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Q.3 Attempt any 2 of subsequent. 12 Marks
a) Draw the labelled diagram and discuss the operation of any 1 kind of
transponder.
b) List different tracking methods used by antenna system of RADAR & discuss one
of them.
c) define the functional characteristics of up link model and down link model for a
satellite system.
Q.4 Attempt any 4 of subsequent. 16 Marks
a) Compare FM CW RADAR with MTI RADAR system on the basis of operating
principle and applications.
b) describe uplink and downlink frequencies. Why always uplink frequency is higher
than downlink frequency?
c) Draw well tagged block diagram of satellite subsystem.
d) provide satellite uplink frequency, downlink frequency and area of application for
C band, X band, Ku band and Ka band.
e) Classify the satellites on the basis of their orbital positions.
f) Justify satellite communication is better than other communication methods. Also
list various applications of satellite communication.
Q.5 Attempt any 2 of subsequent. 12 Marks
a) Draw neat block diagram of MTI radar system and state the function of COHO
and STALO blocks.
b) State any 4 propellants used in satellite space ship and state the need of
propulsion subsystem in satellite.
c) What is phased array RADAR? define its principle of operation with neat
diagram.
Q.6 Attempt any 2 of subsequent. 12 Marks
a) List various display methods used in RADAR system. discuss the working of
any 1 method with neat sketch.
b) State and discuss various laws, which govern satellite motion and orbital shape
for satellite in space.
c) Why parabolic antenna is preferred in RADAR system? Justify.

Earning:   Approval pending.