Manonmaniam Sundaranar University (MSU) 2010 B.Sc Electronics Manonmanium Sundaranar University - exam paper

Code No. 1347 Sub. Code: 3EL64B
B.Sc. DEGREE EXAMINATION, APRIL 2010
ELECTRONICS
Sixth Semester
Optional - RADAR AND ITS NAVIGATION
(For those who joined in July 2006 and 2007)
Time: three Hours Max. Marks: 100
part - A (10 x one - 10 Marks)
ans ALL the ques. select the accurate ans
1. Blind speeds in MTI radar outcome in
(a) restriction in speed of detectable targets
(b) blanking of PPI
(c) no change in phase detector output
(d) absorption of electromagnetic waves
2. The maximum range of pulsed radar depends on
(a) pulse peak power
(b) pulse duration
(c) pulse energy
(d) pulse repetition rate
3. The gain of the radar transmitting antenna is
(a) less than that of radar receiving antenna
(b) almost equal to that of radar receiving antenna
(c) slightly higher than that of radar receiving antenna
(d) much higher than that of radar receiving antenna
4. Cylindrical cavity resonations are not used with klystron because they have
(a) too low Q
(b) harmonically related resonant frequency
(c) a shape not permitting easy adjustment of resonant frequency
(d) none of these
5. The loss in signal to noise ratio incurred by
the use of non matched filter is
(a) small (b) high
(c) very high (d) none of the above
6. The portion of the radar receiver which extracts the modulation from the carrier is called as
(a) isolator ^ (b) detector
(c) mixer (d) amplifier
7. The index of refraction is described as
(a)f/c (b)c/f
(c)cf (d)c + f
8. The reflection coefficient for normal (non
smooth) ground terrain is in the range of
(a) 0.1 to 0.3 (b) 0.2 to 0.4 t
(c) 0.3 to 0.5 (d) 0.4. to 0.6
9. The VOR navigation system provide
(a) range of target
(b) height of aero plane
(c) position of ship or plane
(d) none of these
10. LORAN system has
(a) master and slave station
(b) homming path
(c) localizer and glide path
(d) none of these
part - B (5 x six = 30 Marks)
ans ALL the ques. choosing either (a) or (b)
11. (a) discuss the operation of pulse radar with block diagram.
(or)
(b) discuss the operation of envelope detector.
12. (a) discuss the constructional details of coaxial cavity magnetron.
(or)
(b) discuss the operation of plan position indicator.
13. (a) discuss the principles of operation of cross-correlation receiver.
(or)
(b) discuss the operation of FM pulse compression radar.
14. (a) discuss the properties of round earth.
(or) (b) How to detect the targets in land clutter.
15. (a) Derive the formula for synthetic aperture radar.
(or)
(b) Write a note on airborne Doppler navigation.
part - C (5 x 12 = 60 Marks)
ans ALL the ques. choosing either (a) or (b)
16. (a) Derive the radar range formula.
(or)
(b) discuss the operation of sideband super heterodyne radar with block diagram.
17. (a) discuss the operation of Klystron amplifier with neat diagram.
(or)
(b) discuss the principles and operation of Radomes in detail.
18. (a) discuss the characteristics of detector in detail.
(or)
(b) discuss the operation of CFAR receiver with block diagram.
19. (a) discuss the propagation over a plane
earth with necessary diagrams.
(or)
(b) Derive the radar formula for meteorological echoes.
20. (a) discuss in detail the HF over-the-horizon radar.
(or)
(b) discuss the instrument landing system with schematic diagram.

Earning:   Approval pending.