WBUT B.Tech ECE ANTENNA THEORY and PROPAGATION 2013 Question Paper

WBUT Old Question Paper
Name : ……………………………………………………………
Roll No. : ………………………………………………………...
Invigilator's Signature : ……………………………………….
CS/B.Tech/(ECE-New)/SEM-6/EC-604A/2013
2013
ANTENNA THEORY and PROPAGATION
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following :
10 1 = 10
i) The intrinsic impedance of free space is
a) 1 ohm b) 4 ohm
c) 120 ohm d) 0 ohm.
ii) When the polarization of the receiving antenna is unknown, to ensure that it receives at least half the power ( except in particular situation ), the transmitted wave should be
a) horizontally polarized
b) vertically polarized
c) circularly polarized
d) elliptically polarized.
iii) Microwaves antenna aperture efficiency depends on
a) feed pattern b) antenna aperture
c) surface losses d) low side lobe level.

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