MAR
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QUESTION BANK
Semester: - V Course:-MAR (22535)
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Unit- I Fundamentals of Microwave communication and Waveguides (14 M)
2 Marks Questions
1. List application of Microwave in various fields.
2. State frequency ranges for following bands a) C band b) X- band c) K band d) Ku bands.
3. Explain the dominant mode of rectangular waveguide.
4 Marks Questions
4. Sketch Microwave frequency spectrum with band designation.
5. Differentiate between waveguide and two transmission line.
6. Define a) cut off frequency b) group velocity c) cut off wavelength d) phase velocity of
waveguide.
7. Sketch the field pattern of TE10, TE20 and TE11 modes of rectangular waveguide.
8. Compare rectangular waveguide and circular
9. State two advantages and two applications of circular waveguide.
10. For rectangular waveguide with a wall separation of 3 cm and desired frequency of operation
6 GHz, determine group and phase velocity.
11. Determine the cut off wavelength for the dominant mode in a rectangular waveguide of
breadth 10cm for 2.5 GHz signal propagates in this waveguide in the dominant mode calculate
the guide wavelength and group velocity.
Unit -II Microwave Passive Components (08 M)
2 Marks Questions
12. List application of Magic Tee.
13. Draw construction of Rat race ring.
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4 Marks Questions
14. Describe the procedure to built / prepare the microwave test bench setup with help of
microwave accessories and component.
15. Describe the working principle of directional coupler with neat sketch.
16. Explain working principle of isolator with neat sketch and state its application .
17. Sketch the construction of circulator and isolator and state their applications.
Circulator.
Unit- III Microwave Active Components (12 M)
2 Marks Questions
18. Classify the microwave tube.
19. List two applications Reflex Klystron.
20. List two application of two cavity klystron.
21. List two application of magnetron.
22. List applications of IMPATT diode.
23. List applications of PIN diode.
4 Marks Questions.
22. Explain the working of Reflex Klystron with neat diagram.
23. Describe the working principle of two cavity klystron with neat diagram.
24. Explain the working principle of travelling wave tube(TWT) with neat diagram.
25. Draw constructional details of magnetron and explain the operating principle
26. Compare Klystron, Magnetron and TWT.
27. Draw equivalent circuit and VI characteristics of Tunnel diode.
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28. Describe the operating principle of PIN diode and state its two applications.
29. Draw the construction of GUNN diode and describe the application of GUNN diode
as an oscillator
30. Draw neat constructional diagram of IMPATT diode. Describe its working.
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Unit -IV Radar Fundamentals (12 M)
2 Marks Questions
7. Draw block diagram of Radar system and explain it.
8. Give the factors that affect the RADAR range.
9. Give the typical usage of RADAR Beacon.
4 Marks Questions
10. Draw the block diagram of Pulsed RADAR explains it.
11. List the different antenna scanning pattern in RADAR. Explain any one.
12. Give RADAR range equation .Discuss the factors influencing maximum range.
13. Explain the working principle of Horn Antenna with neat sketch.
Unit- V Radar Systems (12 M)
2 Marks Questions
14. Show the use of Doppler Effect to calculate the relative velocity.
15. List the two advantages and two disadvantages of CW RADAR.
16. What is Blind speed?
17. State the application of MTI Radar.
18. List the application of SONAR System.
4 Marks Questions
19. Calculate the maximum range of a guided missile tracking RADAR operate at 5GHz
With a 1 Mwatt peak power output. If the antenna diameter is 3m and the receiver has
a bandwidth of 2MHz with 10 dB noise figure. The target cross section is 2m2.
20. An MTI RADAR operates at 8 GHz with a prf of 3500 pps. Calculate the lowest
Three blind speeds of this RADAR.
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21. Draw the block diagram and explain operation of CW Doppler RADAR.
22. Classify different antenna patterns in Doppler Radar. Explain any one.
23. Distinguish between stationery target and moving target .Explain principle of MTI
RADAR.
24. List different display methods used in Radar. Explain any one.
25. State the working principle of SONAR System.
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