Question
Name the type of waves which are used for line of sight (LOS) communication. What is the range of their frequencies?
A transmitting antenna at the top of a tower has a height of 20 m and the height of the receiving antenna is 45 m. Calculate the maximum distance between them for satisfactory communication in LOS mode. (Radius of the Earth = 6.4 × 106 m)
Solution
Types of waves are:
i) space waves
ii) radio waves
iii) microwave
The frequency range for LOS communication is 40 MHz.
Given,
Height of the transmitting antenna, h = 20 m
Height of receiving antenna = 45 m
So, maximum distance between transmitting antenna and receiving antenna is given by,
