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Find the directivity of a pyramidal horn antenna with E-plane aperture width 10λ and H-plane aperture width 15λ?

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Find the directivity of a pyramidal horn antenna with E-plane aperture width 10λ and H-plane aperture width 15λ?

(a) 30.15dB

(b) 30.51dB

(c) 3.051dB

(d) 35.01dB

The question was posed to me at a job interview.

The origin of the question is Design topic in chapter Horn Antenna of Antennas

1 Answer

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Correct option is (a) 30.15dB

The explanation: Directivity \( = 10log_{10}\frac{7.5A_e}{λ^2} = 10log_{10}\frac{7.5×10λ×15λ}{λ^2} =30.51dB

\)

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