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Posted By: Sree.... Member Level: Diamond Posted Date: 07 Feb 2008
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2007 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech RADAR ENGINEERING Set No.3 Question paper
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Code No: RR420402 Set No. 3
IV B.Tech II Semester Supplementary Examinations, June 2007
RADAR ENGINEERING
(Electronics & Communication Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Derive the Radar range equation.
(b) With a block diagram explain the operation of pulse radar. [6+10]
2. (a) How is the effect due to cross-section fluctuations of targets minimized?
(b) Discuss about the probability of false alarm.
[8+8]
3. (a) What are the advantages and disadvantages of CW Doppler Radars
(b) What is the importance of providing isolation between transmitter and re-
ceiver? Explain clearly the different method of providing isolation in the case
of CW Radar. [8+8]
4. (a) Explain the operation of an MTI radar with 2 prfs.
(b) Draw the block diagram of Range-Rated Doppler Filters and explain. [8+8]
5. (a) Draw the block diagram of non-coherent MTI Radar and explain the function
of each block in detail.
(b) Give the advantages of non-coherent MTI Radar. [10+6]
6. (a) What are the various methods of acquisition before tracking a target with a
radar? Explain in detail.
(b) How many techniques are employed to track a radar target? Explain that
technique which employs one single pulse for extracting error information.
[6+10]
7. With reference to radar parabolic reflector antennas-explain the following:
(a) Types of feeds.
(b) Aperture blocking and offset feed.
(c) f/D ratio and front-to-back ratio.
(d) Reflector surfaces. [4×4]
8. (a) Describe and distinguish between the different types of ECM directed against
a radar.
(b) Discuss the relations between the matched filter characteristics and correlation
function. [8+8]
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