Space waves are used for line-of-sight (LOS) communication as well as satellite communication. Because of line-of-sight nature of propagation, direct waves gets blocked at some point by the curvature of the earth as illustrated in figure. If the signal is to be received beyond the horizon then the receiving antenna - must be high enough to intercept the line-of-sight waves.
- In the above question, \( d_{T} \) is also called the radio
- (a) horizon of the transmitting antenna
(b) horizon of the transmitter
(c) horizon of the modulation
(d) horizon of the signal
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