The physical aperture of the horn antenna is 137 λ2 m2 . Find the directivity of the horn antenna.
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Answer: 30.12 dB
Explanation:
Given: Ap = 137 λ2 m2.
The directivity of horn antenna is given by,
D = ((7.5)〖 Ap)/λ^2 = ((7.5)(137 λ^2))/λ^2 = 1027.5
In dB, we can write
D (in dB) = 10 log10 (D) = 10 log10 (1027.5) = 30.12 dB
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