Question

What does the term LOS communication mean? Name the types of waves that are used for this communication. Which of the two height of tansmitting antenna and height of receiving antenna can effect the range over which this mode of communication remains effective?

Answer 1

LOS means Line-of-sight communication space waves. These are used for line of sight (LOS) communication.
If `h_(T) and h_(R)` be the heights of transmitting antenna and the receiving antenna respectively, then the maximum Line-of-sight distance `d_(M)` between the two antennas is given by
`d_(M)=sqrt(2Rh_(T))+sqrt(2Rh_(R))`
where `R rarr` radius of the earth.
The height of transmitting antenna can effect the communication system but the height of receiving antenna cannot effect the communication system.