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Satellite Communication

Q1:

To make antenna more directional, either its size must be increased or

A the number of its feed horns must be increased

B the frequency of its transmission must be increased

C its effective isotropic radiated power (EIRP) must be increased

D its footprint must be increased

ANS:B - the frequency of its transmission must be increased

To make an antenna more directional, it must have a small or narrow beam width. Since beam width is directional to "lambda" or wavelength, that means it is inversely proportional to the frequency. Therefore, increasing its frequency will give it a narrow beam width thus, making the antenna more directional.



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