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 | December, 2015 | |
City, State | new delhi, |
Question Paper
Show that the directivity of an antenna is
D 4n 8HP oHP
where 8HP and oHP are the beam width of an antenna in horizontal and vertical plane respectively.
Draw and explain the various components of the radiation pattern of an antenna.
2. Discuss the following parameters of an antenna in brief:
Radiation intensity
Effective height
Antenna temperature
Power gain and directive gain
3. Derive and plot the radiation pattern for two isotropic point sources of same amplitude but opposite phase.
What is a thin linear antenna? Write down the advantages of folded dipole over linear dipole.
Derive the expression for the radiation resistance of a short dipole.
Describe horn antenna. How is this antenna fed and what are its applications?
Compute the directivity of a rectangular horn antenna, whose one side of aperture is a 10A.
Draw and explain the constructional details of slot antenna.
Explain Balinet's principle.
Draw and explain the operation of helical antenna.
Find the directivity, beam width and effective area for a parabolic reflector antenna having illumination efficiency 0.65, reflector diameter of 5 m and operating frequency of 10 GHz.
8. Discuss various types of reflectors used to modify the radiation pattern of any antenna with their radiation pattern.
9. Explain how the Earth's magnetic field affects the propagation of radio waves in the ionosphere. Discuss its affect on the polarization of radio waves.
10. Define and explain with reference to ionospheric propagation:
Critical Frequency
Critical Angle
Maximum Usable Frequency
Skip Distance
D 4n 8HP oHP
where 8HP and oHP are the beam width of an antenna in horizontal and vertical plane respectively.
Draw and explain the various components of the radiation pattern of an antenna.
2. Discuss the following parameters of an antenna in brief:
Radiation intensity
Effective height
Antenna temperature
Power gain and directive gain
3. Derive and plot the radiation pattern for two isotropic point sources of same amplitude but opposite phase.
What is a thin linear antenna? Write down the advantages of folded dipole over linear dipole.
Derive the expression for the radiation resistance of a short dipole.
Describe horn antenna. How is this antenna fed and what are its applications?
Compute the directivity of a rectangular horn antenna, whose one side of aperture is a 10A.
Draw and explain the constructional details of slot antenna.
Explain Balinet's principle.
Draw and explain the operation of helical antenna.
Find the directivity, beam width and effective area for a parabolic reflector antenna having illumination efficiency 0.65, reflector diameter of 5 m and operating frequency of 10 GHz.
8. Discuss various types of reflectors used to modify the radiation pattern of any antenna with their radiation pattern.
9. Explain how the Earth's magnetic field affects the propagation of radio waves in the ionosphere. Discuss its affect on the polarization of radio waves.
10. Define and explain with reference to ionospheric propagation:
Critical Frequency
Critical Angle
Maximum Usable Frequency
Skip Distance
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
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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