STUPIDSID
1 (a)
Explain significance of directivity and radiation pattern of antenna.
5 M
1 (b)
Describe the concept of near field and far field radiation.
5 M
1 (c)
Discuss the voltage and current distribution of a half wave dipole antenna. Can we say the antenna is resonant?
5 M
1 (d)
Differentiate between broadside and end fire array.
5 M
2 (a)
Explain the significance of the term Effective Area of an Antenna. Derive the relation between effective area and directivity of any antenna.
10 M
2 (b)
Describe parabolic reflector and its use of microwave frequencies. Discuss Cassegrain method of feeding the parabolic reflectors.
10 M
3 (a)
State and derive FRIIS transmission equation.
10 M
3 (b)
What is the maximum power received at a distance of 0.5 km over a free space 1 GHz circuit consisting of a transmitting antenna with a 25 dB gain and a receiving antenna with a 20dB gain. The transmitting antenna is fed with 150 W of power.
10 M
4 (a)
Explain V antenna and rhombic antenna. List their advantages and disadvantages. Mention their applications.
10 M
4 (b)
Explain and derive equations for total electric field, directivity, half power beam width in case of two isotropic point sources of same amplitude but opposite phase.
10 M
5 (a)
Explain the difference in driven and parasitic elements in an antenna array. Differentiate between a director and a reflector.
10 M
5 (b)
Explain the formation of inversion layer in the troposphere and the phenomenon of duct propagation. What factors help in the formation of duct?
10 M
6 (a)
Derive the expression for vector potential wave equation.
10 M
6 (b)
Explain different types of horn antennas. Find the directivity and beamwidth.
10 M
7 (a)
Ionospheric propagation.
5 M
7 (b)
Log periodic antenna.
5 M
7 (c)
The equivalent noise temperature of an antenna.
5 M
7 (d)
Folded dipole and its applications.
5 M
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