JNTU Kakinada B-Tech 4-1 RADAR SYSTEMS R13 March 2018 Question Paper

IV B.Tech I Semester Supplementary Examinations, February/March – 2018
RADAR SYSTEMS (Electronics and Communication Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THREE questions from Part-B
*****

PART ?A (22 Marks)1. a) Calculate R
unamb
of a radar if f
p
is 2MHz? [4]
b) Define operator loss? What is the efficiency factor of operator? [4]
c) Define STALO & COHO? [3]
d) Write notes on equipment instabilities? [4]
e) Discuss about ?Efficiency of non-matched filters?? [4]
f) Define the noise figure equation in ?dB?s? [3]

PART ?B (3×16 = 48 Marks)
2. a) Explain the working principle of basic radar system? [8]
b) Explain about integration of radar pulses? [8]

3. a) Discuss types of system losses in radar system? [8]
b) Draw the diagram of wanted and unwanted signals in FM altimeter? Explain? [8]

4. a) Explain the butterfly effect on A-scope display? [8]
b) Explain the function of sequential lobing tracking radar? [8]

5. a) With suitable block diagram, explain the function of one-coordinate amplitude
comparison monopulse radar? [8]
b) Explain the working of lens antenna used in radar system? [8]

6. a) Explain the architecture for phased arrays? [8]
b) Explain the working principle of correlation detection with a neat diagram? [8]

7. a) Derive the noise figure of N-stage cascade network? [8]
b) How a circulator works as duplexer? Explain. [8]

Code No: RT41048
Set No. 1
R13
1 of 1