Which of the following antennas is circularly polarized? - Communication Systems

Electronics and Communication Engineering (ECE) : Communication Systems - Quiz(MCQ)

Which of the following antennas is circularly polarized?

A)

Helical

B)

Yagi-Uda

C)

Parabolic reflector

D)

Small circular loop

Correct Answer : Option (A) : Helical

Explanation : The helical antenna is circularly polarized, i.e., its polarization is evenly divided between vertical and horizontal components.

Recently Updated in Communication Systems Questions

In TV scanning sequence of lines is

A)

right to left

B)

left to right

C)

left to right for odd fields and right to left for even field

D)

left to right for even fields and right to left for odd field

Correct Answer : left to right

Which of the following terms are applicable to troposcatter propagation?

A)

SIOs

B)

Fading

C)

Faradays rotation

D)

Atmospheric storms

Correct Answer : Fading

Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.

A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about

A)

1.3 mm

B)

130 mm

C)

13 mm

D)

None of the above

Correct Answer : 13 mm

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