Exam Details
| Subject | Antennas and Propagation | |
| Paper | ||
| Exam / Course | BTCVI / BTECVI / BTELVI | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 3
B.Tech. -VIEP -ELECTRONICS AND
(BTECVI) Examination
June, 2016
BIEL-013 ANTENNAS AND PROPAGATION
Time: 3 hours Maximum Marks: 70
Note: Attempt any seven questions. All questions carry equal marks. Use of scientific calculator is allowed. Missing data, if any, may be suitably assumed.
1. Derive the relationship between effective aperture and beam area of an antenna. 5
For a parabolic reflector antenna operating at a frequency of 4 GHz with a diameter of 30 m and efficiency of calculate its gain and bandwidth. 5
2. What is an antenna array? Explain the difference between driven and parasitic elements in an antenna array. 5
Explain the principles of pattern multiplication with examples. 5
3. Draw and explain end fire array. 5
Derive the expression for the radiation resistance of X/2 antenna. 5
4. Explain the working, construction details and radiation pattern of a folded dipole antenna. 10
5. Derive the expression for the induced voltage and field strength for a circular loop antenna. Draw its radiation pattern also. 10
6. Differentiate among isotropic radiator, directional antennas and omnidirectional antennas with their radiation patterns. 5
A pyramidal horn antenna has an aperture of 20 cm x 15 cm. If the operating frequency is 6 GHz and field distribution is uniform over the aperture, calculate the maximum directivity and the beam width of the antenna. 5
7. Describe a log periodic antenna and explain its operation. 5
Write down the sailent features of ultra wide band antennas. 5
8. What is a Yagi-Uda antenna Explain its construction and properties with reference to directivity and bandwidth. 5
Discuss the electrical properties of the ionosphere. 5
9. Describe ground wave propagation with frequency use and applications. 5
Find the maximum electron density of the ionospheric layer corresponding to refractive index of 0.65 at the frequency of 12 MHz. 5
10. Write short notes on any two of the following: 2 x 5=10 Low-side Lobe Arrays Turnstile Antenna Embedded Antennas
B.Tech. -VIEP -ELECTRONICS AND
(BTECVI) Examination
June, 2016
BIEL-013 ANTENNAS AND PROPAGATION
Time: 3 hours Maximum Marks: 70
Note: Attempt any seven questions. All questions carry equal marks. Use of scientific calculator is allowed. Missing data, if any, may be suitably assumed.
1. Derive the relationship between effective aperture and beam area of an antenna. 5
For a parabolic reflector antenna operating at a frequency of 4 GHz with a diameter of 30 m and efficiency of calculate its gain and bandwidth. 5
2. What is an antenna array? Explain the difference between driven and parasitic elements in an antenna array. 5
Explain the principles of pattern multiplication with examples. 5
3. Draw and explain end fire array. 5
Derive the expression for the radiation resistance of X/2 antenna. 5
4. Explain the working, construction details and radiation pattern of a folded dipole antenna. 10
5. Derive the expression for the induced voltage and field strength for a circular loop antenna. Draw its radiation pattern also. 10
6. Differentiate among isotropic radiator, directional antennas and omnidirectional antennas with their radiation patterns. 5
A pyramidal horn antenna has an aperture of 20 cm x 15 cm. If the operating frequency is 6 GHz and field distribution is uniform over the aperture, calculate the maximum directivity and the beam width of the antenna. 5
7. Describe a log periodic antenna and explain its operation. 5
Write down the sailent features of ultra wide band antennas. 5
8. What is a Yagi-Uda antenna Explain its construction and properties with reference to directivity and bandwidth. 5
Discuss the electrical properties of the ionosphere. 5
9. Describe ground wave propagation with frequency use and applications. 5
Find the maximum electron density of the ionospheric layer corresponding to refractive index of 0.65 at the frequency of 12 MHz. 5
10. Write short notes on any two of the following: 2 x 5=10 Low-side Lobe Arrays Turnstile Antenna Embedded Antennas
Other Question Papers
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Subjects
- Advance Microprocessor And Architecture
- Analog and Mixed Mode VLSI Design
- Analog Communication
- Analog Electronic Circuits
- Analog Integrated Circuits Design
- Antennas and Propagation
- B10-Informatics
- Basics Of Electronics Engineering
- Computer Architecture
- Computer Communication Networks
- Control Engineering
- Data Communication And Network
- Device Modelling For Circuit Simulation
- Digital Electronics
- Digital Signal Processing
- Digital System Design
- Electromagnetic Field Theory
- Electronic Measurement and Inst
- Electronic Switching Circuits
- Embedded System Design
- Information Theory And Coding
- Linear Integrated Circuits
- Microcontrollers
- Microprocessor And Its Applications
- Microwave And Radar Engineering
- Multirate Systems
- Optical Fiber Communication
- Power Electronics
- Satellite And Tv Engineering
- Signal And Systems
- Wireless Communication