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A transmitting antenna radiates 251 W Isotopically.

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A transmitting antenna radiates 251 W Isotopically. A receiving antenna located 100m away from the transmitting antenna has an effective aperture of 500 cm2. The total power received by the antenna is.

(a) 10 μ W

(b) 1 μ W

(c) 20 μ W

(d) 100 μ W

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1 Answer

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Best answer

The correct option is ( d ) 

Explanations:

Given,

Power transmitted by antenna (isotropically) = 251 W

Distance between antennas =100 m

Aperture area of receiving antenna = 500cm2

=500*10-4 m2

Power received (Pr) = PT/4πr2 * Aperture

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