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Paper Id: 131825
Roll No.
B TECH
(SEM-VIII) THEORY EXAMINATION 2017-18
SATELLITE & RADAR SYSTEMS
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Time: 3 Hours
Total Marks: 100
Note: 1. Attempt all Sections.
2. Assume any missing data.
SECTION A
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1. Attempt all questions in brief. 2 x10 = 20
- What do you mean by false alarm?
- Calculate average power when peak power is 200 KW, pulse width is 2 us and rest time is 2000s.
- What do you understand by Blind speed?
- What are the limitations of MTI performance?
- Explain Low angle tracking in brief.
- Why down link frequency should be lower than uplink frequency?
- Describe the term Telemetry.
- Explain kepler's law of planetary rotation.
- Write Short note on timing Accuracy.
- Write Short note on GPS signal levels.
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SECTION B
2. Attempt any three of the following: 10 x 3 = 30
- Derive radar range equation. Radar is operating at 10GHz with the peak power of 500KW, the power gain of antenna is 5000 & minimum power of the receiver is 10-14. Calculate the maximum range of radar if the effective area of antenna is 10m² & radar cross-section is 4m².
- Explain MTI radar with suitable block diagram. Also give its applications. Compare Pulse Doppler Radar & MTI radar with block diagram.
- What do you understand by Tracking with radar? Explain Mono pulse tracking in detail.
- Derive the general link equation. Find out the expression for C/N and G/T ratio.
- Explain the basic principle of a GPS system. Explain why a minimum of four satellites must be visible at an earth location utilizing the GPS system for position determination.
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SECTION C
3. Attempt any one parts of the following: 10 x 1 = 10
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- What is a duplexer? Explain the operation of a radar duplexer with the help of a circuit diagram. What is the main limitation of the duplexer? Explain.
- With the help of schematic block diagram, explain radar transceiver system.
4. Attempt any one parts of the following: 10 x 1 = 10
- Explain Delay Line Canceller and Staggered Pulse Repetition Frequencies in detail.
- Draw the block diagram and explain the operation of CW radar using zero intermediate frequency in the receiver. How have the drawbacks of the radar been overcome?
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5. Attempt any one parts of the following: 10 x 1 = 10
- Describe with aid of sketch, the conical scanning method of tracking. How it is improvement over Lobe switching
- Explain what is meant by geostationary orbit. How do the geostationary orbit and geosynchronous orbit differ? Explain how a satellite is placed into a geostationary orbit?
6. Attempt any one parts of the following: 10 x 1 = 10
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- Derive the expression for overall satellite link design. How a complete satellite link becomes down link limited? How the overall satellite link design is affected by intermodulation noise?
- Discuss about various satellite subsystems highlighting their important functions and characteristics.
7. Attempt any one parts of the following: 10 x 1 = 10
- State and explain the different segments of GPS. What is meant by satellite signal acquisition in GPS?
- With the help of a suitable block diagram, explain the working of DBS Television network in detail.
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This download link is referred from the post: AKTU B-Tech Last 10 Years 2010-2020 Previous Question Papers || Dr. A.P.J. Abdul Kalam Technical University
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