Gujarat Technological UniversitySummer 2024 examination

GTU 2181103 Radar & Navigational Aids Summer 2024 Question Paper & PDF

B.E. · EC Engineering · Semester 8 · Subject code 2181103
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 10:30 AM – 1:00 PM
Questions
5 with internal choice
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Q.1

14 Marks
(a)
3 marks

What do you mean by Navigation? Explain different types of Navigation Aids.

(b)
4 marks
Define the following parameters:
i)Receiver noise
ii)Pulse repetition frequency
iii)False alarm
iv)Blind speed
(c)
7 marks

What is a multiple-time-around echoes and how it is related to radar’s PRF? Considering three targets at different distances, explain a method of distinguishing MTA echoes from unambiguous echoes, using A scope.

Q.2

14 Marks
(a)
3 marks
Explain the principle of RADAR.
(b)
4 marks
Define and explain RADAR cross-section.
(c)
7 marks

Why loop antennas are used in direction finding? Derive an expression for induced output voltage of loop antenna having N turns.

(c)
7 marks

Write, explain and compare the three radar range equations. Maximum range of the radar is inversely proportional to the square-root of wavelength, Justify.

Q.3

14 Marks
(a)
3 marks
What is Principle of Hyperbolic Navigation
(b)
4 marks

Define radar clutter & prove that clutter power is inversely proportional to the square of the range.

(c)
7 marks

Define Direction Finding term and which antenna is used for this purpose and why?

(a)
3 marks
Explain basic principle of MTI radar.
(b)
4 marks
What do you mean by Beat frequency? Explain in brief.
(c)
7 marks

How do tracking and scanning radar differ? Explain Conical scan tracking radar.

Q.4

14 Marks
(a)
3 marks
How clutter Attenuation is obtained in the delay line cancellers?
(b)
4 marks
Draw neat block diagram of FMCW radar.
(c)
7 marks

Explain working of Microwave landing system (MLS). Also mention its advantage and disadvantage.

(a)
3 marks
What is meant by Satellite Constellations?
(b)
4 marks
Enlist and explain different types of displays used in Radar
(c)
7 marks

Explain the principle of working of LORAN A. Discuss the sequence of transmission and reception of pulses. How absolute delay τ is measured?

Q.5

14 Marks
(a)
3 marks
Describe minimum detectable signal and SNR with respect to radar.
(b)
4 marks
Explain Radio Altimeter with neat waveform.
(c)
7 marks
Explain the GPS Principle of operation. Enlist the uses of GPS system.
(a)
3 marks
Enlist the important applications of RADAR.
(b)
4 marks
Compare Basic Pulse RADAR and CW RADAR System.
(c)
7 marks

With a neat sketch describe the TACAN beacon equipment. Explain how the desired antenna pattern is obtained and timing of the reference pulse groups is ensured.

Other Semester 8 subjects

BE EC

2181102
Fundamentals of Image Processing

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About this paper

Official Gujarat Technological University (GTU) examination paper for Radar & Navigational Aids (Summer 2024, B.E. · EC Engineering, Sem 8). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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