STUPIDSID
1 (a)
Explain hazard of electromagnetic radiation.
5 M
1 (b)
Find the attenuation of a 4 element 2.5 db ripple low pass Chebyshev filter at ω/omegac=2.5.
5 M
1 (c)
What are isotropic pattern and Omnidirectional pattern. Give one example for each.
5 M
1 (d)
Explain near and far field radiation related to antenna.
5 M
2 (a)
Discuss design procedure for filter using image parameter method.
10 M
2 (b)
Design a LPF whose input and output ports are matched to 50Ω impedance with cutoff frequency of 3 GHz, equi-ripple of 0.5 dB and rejection of at least 40 dB at approx. twice the cutoff frequency.
10 M
3 (a)
Explain significance of retarded magnetic vector potential and retarded electric scalar potential.
10 M
3 (b)
Derive radiation resistance of half wave dipole antenna and monopole antenna.
10 M
4 (a)
Find the radiation pattern for an array of 4 elements fed with same amplitude and same phase. Find its HPBW and BWFN.
10 M
4 (b)
State and prove Reciprocity theorem as applicable to antennas.
10 M
5 (a)
Design Dolph-T Chebyshev array of 6 elements with spacing 'd' between elements with a major to minor lobe ratio of 26 dB. Calculate the excitation coefficients.
10 M
5 (b)
Explain the structure of Microstrip antenna. Discuss its feed mechanisms and applicatins.
10 M
6 (a)
Log periodic antennas.
5 M
6 (b)
Schottky diode.
5 M
6 (c)
Broad side and End fire array.
5 M
6 (d)
Feeding methods of Parabolic antenna.
5 M
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