Monopole Antennas MCQs

Practice Monopole Antennas MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Antenna & Wave PropagationMonopole Antennas

A quarter-wave monopole antenna mounted over an ideal conducting ground plane has an approximate physical height of?

Alambda/8
Blambda/4
Clambda/2
Dlambda

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Correct Answer: B. lambda/4

Explanation: A quarter-wave monopole is approximately one-quarter wavelength high and uses the ground plane as its image counterpart.

Reference: Standard antenna and wave propagation: monopole antennas

Question 2

Antenna & Wave PropagationMonopole Antennas

The approximate directivity of a quarter-wave monopole over an ideal infinite conducting ground plane is?

A1 or 0 dBi
B1.64 or 2.15 dBi
C3.28 or 5.15 dBi
D10 or 10 dBi

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Correct Answer: C. 3.28 or 5.15 dBi

Explanation: An ideal quarter-wave monopole radiates into one hemisphere and has about twice the directivity of a half-wave dipole, approximately 3.28 or 5.15 dBi.

Reference: Standard antenna and wave propagation: monopole antennas