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Larger the size of the aperture, the narrower is the Beam-widths.

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Larger the size of the aperture, the narrower is the Beam-widths.

(a) True

(b) False

The question was asked in semester exam.

My question is from Aperture Antenna topic in section Aperture Antenna of Antennas
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The correct option is (a) True

Easiest explanation: The FNBW in E-plane is given by FNBW=2 θ \(= sin^{-1}(⁡(\frac{n\lambda}{b})). \)As the dimension of the antenna aperture increases, the FNBW will decrease. Thereby, beam-width becomes narrower.

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