SRM University 2007 B.Tech Electronics and Communications Engineering Bank : Radar Systems and Navigational Aids - Question Paper

6. Explain with a block diagram range gated Doppler filters
7. Explain with a block diagram of non coherent MTI radar
8. Explain in detail about pulse Doppler radar
9. Explain with a neat diagram about sequential lobing
10. Explain with a neat block diagram of conical scan tracking radar
11. Explain briefly about amplitude comparison monopulse radar
12. Explain briefly about phase comparison monopulse radar
13. Explain in detail about multiple frequency CW radar

UNIT III - Synthetic Aperture & Air Surveillance Radar
PART A
1. What is synthetic aperture radar?
2. Define range resolution
3. What is inverse SAR?
4. What is air surveillance radar?
5. What are the characteristics of long-range air surveillance radar?
6. What is inter Ferro meter
7. What is ECM?
8. What is ECCM?
9. Define jamming
10. What is noise jamming?
11. What is spot jammer
12. Define frequency agility
13. What is meant by barrage jammer
14. What is meant by CFAR
15. What is meant by repeater jammer
16. Write about passive ECM
17. What is spot chaff and corridor chaff
18. Define bistatic radar and monostatic radar
19. Write the bistatic radar formula
20. What are the info available from bistatic radar

PART -B
1. Explain in detail about synthetic aperture radar
2. Describe in detail about air surveillance radar
3. Explain briefly about the characteristics of long range air surveillance radar
4. Derive the radar formula for SAR
5. Explain in detail about ECCM
6. Write short notes on noise jamming
7. Explain briefly about repeater jamming
8. Write a short notes on passive ECM
9. Describe in detail about bistatic radar
10. Compare bistatic and monostatic radar

UNIT-IV - Radar Signal Detection & Propagation On Waves
PART-A
1. What are the 2 basic operations performed by a radar?
2. Define matched filter and provide its frequency response function.
3. What is kind I and kind II Error?
4. What is Coherent and Non-Coherent Detector?
5. What is meant by automatic Detection?
6. What are the 4 basic aspects of automatic detection?
7. What is meant by double threshold detection?
8. Explain the concept of Tapped Delay Line Integrator.
9. What is Re-circulating Delay Line Integrator?
10. Give the advantages of CFAR.
11. Define ambiguity diagram and draw its ideal plot.
12. Write down the properties of ambiguity diagram.
13. Give the applications of short pulse to radar.
14. What is meant by clutter and Glint Reduction?
15. What is meant by Linear FM Pulse Compression?
16. What is meant by Refraction and diffraction?
17. Define Evaporation Duct.
18. Define surface clutter.
19. Write down the surface-clutter radar formula.
20. Give the concept of correlation detector.
PART-B
1. Explain in Detail about various kinds of observer model based on threshold detection.
2. Explain in detail about binary moving – window detector with a neat block diagram.
3. Write short notes on (a) Tapped Delay Line Integrator (b) Re-circulating Delay line Integrator.
4. Explain briefly about CFAR Receiver.
5. Explain in detail about Ambiguity Diagram.
6. What is Pulse Compression? discuss in detail about Linear FM pulse compression.
7. Explain in detain about propagation over a plane earth.
8. Write short notes on (a) Anamalous propagation (b) Diffraction.
9. Explain in detail about surface clutter.
10. Derive surface clutter radar formula.

UNIT-V - Radio Navigation
PART-A
1. What is the function of Adcock antenna?
2. Mention the kinds of automatic direction finders.
3. Draw the block diagram of radio compass receiver.
4. What is the operating frequency range for VHF Omni directional finder and draw the block diagram.
5. What are the equipments that are used in VOR Receiver?
6. List out the sources which make fault in VOR System.
7. What is the principle behind hyperbolic systems?
8. What do you mean by LORAN-A?
9. What are the various systems that are used for determining the delay?
10. Explain the range and accuracy of DECCA.
11. What are the kinds of secondary radar system and list the elements of such a system.
12. Draw the block diagram of ILS.
13. What is the function of localizer?
14. What are the components used in ILS?
15. What are the major elements that are used in GCA?
16. What are the basic elements of MLS and draw the block diagram.
17. What are the drawbacks of ILS?
18. Draw the block diagram of TACAN beacon equipment.
19. What are the kinds of landing system?
20. What are the site effects in the ILS?
PART-B
1. Explain Adcock direction finder.
2. Explain the kinds of Automatic direction finders with a block diagram
3. Explain Radio compass Automatic direction finder
4. Explain VHF phase comparison automatic direction finders
5. With a block diagram discuss the operation of VHF omni-directional range.
6. Explain in detail about LORAN navigation system
7. Briefly discuss DECCA navigation system
8. Write short notes on DECCA receivers
9. Explain TACAN secondary radar systems.
10. Explain the kinds of landing systems
11. With the block diagram, discuss the operation of GCA system.

Earning:   Approval pending.