Question

What does the term LOS
communication mean? Name the type of waves that are used for this communication. Give typical example with the help of suitable figure of communication systems that use space wave mode propagation.

Answer 1

LOS Communication: It means “Line of sight communication”. Space waves are used for LOS communication In this communication the space waves (radio or microwaves) travel directly from transmitting antenna to receiving antenna.

Communication System using Space wave mode propagation are (i) LOS communication and Fig. shows LOS communication system. If transmitting antenna and receiving antenna have heights hT and hR respectively, then Radio horizon of transmitting antenna,

(ii) Television, broadcast, microwave links and satellite communication The satellite communication is shown in fig. The space wave used is microwave.