Download GTU B.Tech 2020 Winter 8th Sem 181103 Radar And Navigational Aids Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 8th Sem 181103 Radar And Navigational Aids Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VIII (OLD) EXAMINATION ? WINTER 2020
Subject Code:181103 Date:25/01/2021
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) Enlist and explain the applications of RADAR
07
(b) Briefly explain the basic principle of radar. Also explain and draw the appropriate 07
block diagram of the radar set.


Q.2 (a) List the four methods of navigation. Describe any one in detail
07
(b) Define Normalized RCS. Derive Surface clutter RADAR equation.
07




Q.3 (a) What is Doppler Effect? What is its application in MTI radar? Explain it in
07
terms of Doppler frequency fd.
(b) What is a multiple-time-around echoes and how it is related to radar's PRF? 07
Considering three targets at different distances, explain a method of distinguishing
MTA echoes from unambiguous echoes, using A scope.

Q.4 (a) What do you mean by Blind phase? Differentiate between blind speed and blind
07
speed with neat waveforms .With the help of necessary block diagram explain the
working of a digital MTI Doppler signal processor.
(b) What is DME? Explain the operation of DME inside the aircraft.
07


Q.5 (a) Why the conical scan is more preferable over the sequential lobing? Justify it.
07
(b) How Loop antenna can be used for direction finding? What is the problem of 07
direction ambiguity? Give the solutions for this problem

Q.6 (a) How N-pulse Delay line cancelers are effective for MTI RADAR?
07
(b) List the three different radar range equations. Discuss their significance and Justify 07
"Maximum range of the radar is inversely proportional to the square-root of
wavelength"


Q.7 (a) What do you mean by VOR? Explain VOR receiving equipment
07
(b) With a neat sketch describe the TACAN beacon equipment. Explain how the 07
desired antenna pattern is obtained and timing of the reference pulse groups is
ensured.

Q.8 (a) Write short note on Navstar GPS Receiver system
07
(b) Write short note on Instrument landing system.
07

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