Antenna Pattern Parameters MCQs

Practice Antenna Pattern Parameters MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Antenna & Wave PropagationAntenna Pattern Parameters

The front-to-back ratio of a directional antenna compares radiation in the main-beam direction with radiation?

AIn the opposite direction
BAt the half-power point
CAt 90 degrees only
DAt the feed terminals

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Correct Answer: A. In the opposite direction

Explanation: Front-to-back ratio compares forward radiation with radiation approximately 180 degrees behind the main beam.

Reference: Standard antenna and wave propagation: antenna pattern parameters

Question 2

Antenna & Wave PropagationAntenna Pattern Parameters

An antenna radiates 100 times as much power density in its forward direction as in its backward direction. Its front-to-back ratio is?

A10 dB
B20 dB
C40 dB
D100 dB

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Correct Answer: B. 20 dB

Explanation: For a power ratio, F/B(dB)=10log10(100)=20 dB.

Reference: Standard antenna and wave propagation: antenna pattern parameters