Q.1
14 Marks(a)
What do you mean by multiple-time-around echoes?
(b)
Write, explain and compare the three radar range equations.
(c)
List the four methods of navigation. Describe any one in detail.
Gujarat Technological UniversitySummer 2026 examination
GTU 3171110 Radar and Navigational Aids Summer 2026 Question Paper & PDF
B.E. · EC Engineering · Semester 7 · Subject code 3171110
- Total
- 70 marks
- To pass
- 23 marks (33%)
- Duration
- 2.5 Hours 2:30 PM – 5:00 PM
- Questions
- 5 with internal choice
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Q.2
14 Marks(a)
Explain operation of Radar with the help of neat and clean block diagram.
(b)
Mention the name of Navigation Satellites of different countries and explain in brief.
(c)
What do you mean by Blind phase? Differentiate between blind speed and blind speed with neat waveforms.
OR
(c)
Explain the Pulse Doppler radar with neat block diagram. Compare it with CW radar.
Q.3
14 Marks(a)
Explain different types of duplexers used in RADAR.
(b)
Define direction finder term and which antenna is used for this purpose and why?
(c)
What is Doppler Effect? What is its application in MTI radar? Explain it in terms of Doppler frequency fd.
OR
(a)
Describe minimum detectable signal and SNR with respect to radar.
(b)
Explain Sea clutter.
(c)
Explain sequential lobing & Conical scanning with neat diagram.
Q.4
14 Marks(a)
Explain the GPS Principle of operation.
(b)
Explain briefly:
i)Complex Target
ii)Pulse repetition frequency and range ambiguities
(c)
Draw the block diagram of MTI radar with Power oscillator transmitter and explain its operation.
OR
(a)
Explain the components of Doppler navigation system.
(b)
Mention the advantages of Electronic Scanning Radar.
(c)
What is the principle of TACAN? Explain working of TACAN with the help of simple block diagram.
Q.5
14 Marks(a)
Draw neat block diagram of FMCW radar.
(b)
Define radar clutter & prove that clutter power is inversely proportional to the square of the range
(c)
What is the need for ILS at the airport? Explain the localizer and glide slope systems of ILS with radiation pattern of antennas in each case.
OR
(a)
Define the following:
i)Dwell Time
ii)Radar Cross Section
iii)PRT
(b)
Explain principle of hyperbolic electronics system and name four different hyperbolic navigational systems.
(c)
Explain GAGAN and IRNSS-NAVIC Receiver System.
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About this paper
Official Gujarat Technological University (GTU) examination paper for Radar and Navigational Aids (Summer 2026, B.E. · EC Engineering, Sem 7). 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.