December 17, 2011

Radar Systems JNTU previous years question papers

Radar Systems JNTU previous years question papers

Time: 3 hours
Max Marks: 80
Answer any FIVE Questions

All Questions carry equal marks

1. (a) Write the description of Range gate Doppler filters.
(b) Explain the operation of MTI radar with 2 pulse repetition frequencies. [8+8]

2. (a) How to find the target speed from Doppler frequency?
(b) Write the applications of CW Radar.
(c) What are the factors that limit the amount of isolation between Transmitter and Receiver of CW Radar?[4+6+6]

3. (a) Draw and explain the radiation pattern of phased array antennas.
(b) Write notes on various antenna parameters with reference to radar.[8+8]

4. Discuss the relation between the matched filter characteristics and correlation detection.[16]

5. (a) Explain the operation of the two frequency CW Radar.
(b) How to select the difference between two transmitted signals of CW radar? [8+8]

6. (a) Obtain the SNR at the output of IF amplifier of Radar Receiver for a specified probability of detection without exceeding a specified probability of false alarm.
(b) Explain how system losses will affect on the Radar Range? [8+8]

7. (a) What are the different range of frequencies that a radar can operate and give their applications?
(b) What are the basic functions of radar? In indicating the position of a target, what is the difference between azimuth and elevation? [8+8]

8. (a) Draw and explain the following with respect to Tracking in range:
i. Echo pulse
ii. Early-late range gates
iii. Difference signal between early and late range gates.
(b) Limitation of automatic detection and tracking.[8+8]



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