STUPIDSID
1 (a)
What is antenna, draw and explain all parts of radiation patterns of antenna ?
5 M
1 (b)
Describe the concept of near field and far field radiation.
5 M
1 (c)
Explain effective aperture of antenna.
5 M
1 (d)
What is polarization, how circularly polarized wave can be produced?
5 M
1 (e)
Derive FRIIS transmission equation.
5 M
2 (a)
Derive expression for radiation power density, directivity and effective aperture of infinitesimal dipole antenna.
10 M
2 (b)
Draw and explain folded dipole antenna and λ/2 length with appropriate expressions.
10 M
3 (a)
Derive array factor of N-element linear array, where all elements are equally fed and spaced.
10 M
3 (b)
An array of n=8 in phase isotropic sources spaced λ/2 apart, is to have a side-lobe level 26dB below the main lobe maximum. Find the amplitude distribution fulfilling this requirement that produce the minimum beamwidth between first nulls?
10 M
4 (a)
With suitable diagram, explain log-periodic antenna and derive its essential parameters.
10 M
4 (b)
Draw and explain microstrip antenna, also derive its design parameters.
10 M
5 (a)
Describe normal mode helical antenna and derive axial ratio. What is the effect of the value of diameter D and spacing between each turns S of the same antenna.
10 M
5 (b)
Describe basic geometry of single reflector antenna, also explain how radiation pattern of the same antenna can be modified.
10 M
6 (a)
Draw and explain experimental set up of polarization measurement with appropriate patterns.
10 M
6 (b)
Explain the mechanism of Ionospheric propagation. Define critical frequency.
10 M
7 (a)
Ground wave propagation.
5 M
7 (b)
Directivity of antenna.
5 M
7 (c)
Radiation intensity.
5 M
7 (d)
Rectangular horn antenna.
5 M
7 (e)
Sleeve dipole.
5 M
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