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 81m tall. How much service area can it cover if the receiving antenna is at the ground level?
Answer:
Height of the given antenna (h) = 81 m
Radius of earth (R) = 6.4 x 106 m
For range, d = (2Rh)1/2
A = nd2 = n (2Rh) = 3.14 x 2 x 6.4 x 106 x 81 = 3255.55 x 106 m2 = 3255.55 Km2
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