Radio waves are easy to generate and are widely used for both indoor and outdoor communications because of their ability to traverse buildings and travel long distances.
The key features are :-
• Since radio transmission is omnidirectional in nature, there is no need to physically align the transmitter and receiver.
• The frequency of the radio wave determines many of the characteristics of the transmission.
• At low frequencies, waves can easily pass through obstacles. However, its power falls with an inverse-square relation with respect to distance.
• Higher frequency waves are more prone to absorption by raindrops and are reflected by obstacles.
• Due to the long transmission range of radio waves, interference between transmissions is a problem that must be addressed.