Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 8th Sem 2181103 Radar And Navigational Aids Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VIII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2181103 Date:19/01/2021
Subject Name:Radar & Navigational Aids
Time:02:00 PM TO 04:00 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain the principle of RADAR with the help of block diagram.
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(b) Explain Radar range equation and its significance.
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(c) Define the following parameters:
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i) Delay line canceler ii) Duplexer iii) Blind Speed iv) Pulse repetition
frequency
Q.2 (a) Enlist the important applications of Radar?
03
(b) What is Navigation and Explain different types of navigational aids.
04
(c) What is the peak power of a radar pulse if the pulse width is 1?sec, the
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PRF is 1500Hz and the average power is 500Watts? What is the duty
cycle? Calculate the unambiguous range in nautical miles.
Q.3 (a) Explain Radar Cross section.
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(b) Define radar clutter & prove that clutter power is inversely
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proportional to the square of the range
(c) How Loop antenna can be used for direction finding? What is the
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problem of direction ambiguity? How can we solve this problem?
Q.4 (a) Derive the Radar range equation in terms of bandwidth.
03
(b) Draw the block diagram of pulse radar and explain its operation
04
describing the function of all modules
(c) Explain MTI radar operation with the help of block diagram. How
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moving objects are recognized on an A Scope?
Q.5 (a) Give the point difference between STALO and COHO
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(b) What is Doppler Effect? List advantages of Pulse Doppler radar over
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CW radar.
(c)
Explain working of Microwave landing system (MLS). Also
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mention its advantage and disadvantage.
Q.6 (a) What is meant by Satellite Constellations?
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(b) Enlist different types of displays used in Radar? Explain any one in
04
detail.
(c) Discuss FM-CW radar with block diagram.
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Q.7 (a) How do tracking and scanning radar differ?
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(b) Write short notes on Doppler Navigation.
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(c) Explain Global Positioning system.
07
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Q.8 (a) Enlist various errors in direction finding.
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(b) Explain Synthetic Aperture radar
04
(c) Explain the principle of working of LORAN A. Discuss the sequence
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of transmission and reception of pulses. How absolute delay is
measured?
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This post was last modified on 04 March 2021