Question

Is it necessary for a transmitting antenna to be at the same height as that of the receiving antenna for line-of-sight communication? A TV transmitting antenna is 81 m tall. How much service area can it cover if the receiving antenna is at the ground level?

Answer 1

For line of sight communication, the receiving antenna must intercept the transmitted signal. If the signal is to be received. beyond horizon, the receiving antenna must be high enough to intercept the transmitted signal. Therefore, it is not necessary for a transmitting antenna to be at the same high as that of the receiving antenna.
Here, h = 81m; R = 6.4 x 10⁶ m If d is the radius of the circle within which the transmission can be observed, then

Therefore area in which transmission can be viewed,