Question
Asked Nov 21, 2019
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Directivity of antenna radiating at 15 MHz is 2.5 dB. What will be effective aperture of the antenna?

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Expert Answer

Step 1

Write the expression for effective aperture of the antenna.

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2 -D 4 7T (1) Here is the wavelength of the radiation emitted by the antenna and D is the directivity of the antenna.

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Step 2

Write the expression for wavelength of the radiation emitted by the antenna.

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(2) f Here c is the speed of the light, which is 3x10 m/s and fis the frequency of the radiation emitted by the antenna

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Step 3

Covert the directivity from dB ...

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DB10 log10 (D) D 10 10 2.5 =1010 1.7782

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