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  • A transmitting antenna at top of a tower has a height of 50 m and the height of receiving antenna is 80 m. What is the range of communication for Line of Sight (LoS) mode? [use radius of earth = 6400 km]Option: 1 80.2 kmOption:

A transmitting antenna at top of a tower has a height of 50 m and the height of receiving antenna is 80 m. What is the range of communication for Line of Sight (LoS) mode?
[use radius of earth = 6400 km]
Option: 1 80.2 km
Option: 2 144.1 km
Option: 3 57.28 km
Option: 4 45.5 km

Answers (1)

best_answer

Range\; of\: communication = \sqrt{2h_{T}R}+\sqrt{2h_{R}R}
                                                         = \sqrt{2\times 50\times 6400\times 10^{3}}+\sqrt{2\times 80\times 6400\times 10^{3}}
=10\times 80\times 10\sqrt{10}+40\times 80\times 10
=800\left ( 10\sqrt{10}+40 \right )
=800\left ( 31\cdot 62+40 \right )
Range=57\cdot 28\times 10^{3}m= 57\cdot 28\, km
The correct option is (3)

Posted by

vishal kumar

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