Question

is it necessary for a transmitting antenna to be at the same height as that of a the receiving antennae 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

No, it is not necessary for the antenna to be of same height as there is not obstruction between the transmitting and receiving unit.

The effective area (A) in this case would be

A = Ï€d²

where d = √2Rh

R is the radius of the Earth = 6.4 X 10⁶ m

h is the height of the antenna = 81 m

so A = 3.14 X (2 X 6.4X10⁶ X 81)

or effective coverage area A = 3255.55 X 10⁶ m²