Is it necessary for a transmitting antenna to be at the same heightas that of the receiving antenna for line-of-sight communication? ATV transmitting antenna is 81m tall. How much service area can it cover if the receiving antenna is at the ground level?
Given: The height of the transmitting antenna is 81 m .
In line-of-sight communication, transmitting and receiving antennas are not always at the same height.
The distance to the horizon is given as,
d T = 2 R h .
Where, R is the radius of the earth, d T is distance to the horizon and h is the height of the antenna.
The service area covered can be given as,
A = π d T 2 = π ( 2 R h )
By substituting the values in the above equation, we get
A = 3.14 × ( 2 × 6.4 × 10 6 × 81 ) = 3255.55 × 10 6 m 2 ≈ 3256 km 2
Thus, the service area that can be covered is 3256 km 2 .
Given: The height of the transmitting antenna is
In line-of-sight communication, transmitting and receiving antennas are not always at the same height.
The distance to the horizon is given as,
Where,
The service area covered can be given as,
By substituting the values in the above equation, we get
Thus, the service area that can be covered is
