GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Radar & Navigational Aids
Date: 30/11/2019
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
Subject Code: 2171011
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019Subject Name: Radar & Navigational Aids
Date: 30/11/2019
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | (a) Distinguish between COHO and STALO. | 03 |
| (b) Explain the operation of radar with necessary diagram. | 04 | |
| (c) Write short note on radar transmitters. | 07 | |
| Q.2 | (a) Explain briefly: Pulse Repetition Frequency and range ambiguities | 03 |
| (b) Write short note on pulse Doppler radar. | 04 | |
| (c) Explain principle of phased array for electronic scanning. | 07 | |
| OR | ||
| Q.2 | (a) Write short note on radar antenna. | 03 |
| (b) Explain the block diagram of basic CW RADAR System. | 04 | |
| (c) Explain automatic direction finder through a block diagram. | 07 | |
| Q.3 | (a) Explain block diagram of simple digital MTI radar signal processor. | 03 |
| (b) Explain sea clutter and Land clutter. | 04 | |
| (c) Explain working of LORAN navigation system? | 07 | |
| OR | ||
| Q.3 | (a) What is Duplexer? Discuss principle and working of balanced duplexer with the help of necessary diagram. | 03 |
| (b) Explain briefly Minimum Detectable Signal and Receiver Noise. | 04 | |
| (c) Explain block diagram of amplitude comparison monopulse tracking radar. | 07 | |
| Q.4 | (a) For air surveillance radar, how tracking is done (TWS)? | 03 |
| (b) Explain briefly Goniometer. | 04 | |
| (c) Explain working of LORAN navigation system? | 07 | |
| OR | ||
| Q.4 | (a) Discuss different types of modulators used for radar transmitter with the help of block diagram. | 03 |
| (b) Explain with a neat diagram about sequential lobbing & Conical scanning. | 04 | |
| (c) Explain briefly Global Positioning system. | 07 | |
| Q.5 | (a) Write short note on FM CW radar | 03 |
| (b) Write limitations of CW radar. | 04 | |
| (c) Explain Airborne Doppler navigation. | 07 | |
| OR | ||
| Q.5 | (a) Describe the electronics aids to approach and landing system. | 07 |
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