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Antennas
Antennas Written Test
Quiz 1
Solution
Q.1.
Half-power Beamwidth is given by ____
a) 70λ/D
b) 70D/λ
c) 35λ/D
d) 35D/λ
Q.2.
If the antenna dimension is two times the wavelength of the signal then the half power beam width will be _____
a) 35
b) 140
c) 70
d) 280
Q.3.
For a circular aperture the FNBW is ______
a) 140λ/D
b) 70λ/D
c) 140D/λ
d) 70D/λ
Q.4.
If the antenna dimension is two times the wavelength of the signal then the First null beam width will be _____
a) 35
b) 140
c) 70
d) 280
Q.5.
For a rectangular aperture of a*b the first null in E-plane occur at _______
a) sin-1(λ/b)
b) sec-1(λ/b)
c) cos-1(λ/a)
d) sin-1(λ/a)
Q.6.
The first null beam width in the E-plane of a rectangular aperture of a×b is given by _______________
a) 2sin-1(λ/b)
b) sin-1(λ/a)
c) 2sec-1(λ/b)
d) 2cos-1(λ/a)
Q.7.
Larger the size of the aperture, the narrower is the Beam-widths.
a) True
b) False
Q.8.
Half-power Beam width in E-plane for a rectangular aperture antenna of a×b is given by ____
a) 0.886λ/b
b) 0.443λ/b
c) 0.5λ/b
d) λ/b
Q.9.
Find the HPBW of the uniform rectangular aperture antenna with 4λ×in the E-plane?
a) 0.443
b) 0.886
c) 0.25
d) 0.5
Q.10.
The value at which the second null occurs in H-plane of rectangular aperture of a*b is given by ____
a) sin-1(2λ/a)
b) sin-1(λ/a)
c) sin-1(a/2λ)
d) sin-1(a/λ)
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