[b]antenna wave propagation kd prasad ppt[/b]

Radio Waves
Radio waves are easy to generate and are widely used for both indoor and outdoor communications because of their ability to pass through buildings and travel long distances.

The key features are −

Since radio transmission is Omni directional in nature, the need to physically align the transmitter and receiver does not arise.

The frequency of the radio wave determines many of the characteristics of the transmission.

At low frequencies, the waves can pass through obstacles easily. However, their power falls with an inverse-squared relation with respect to the distance.

The higher frequency waves are more prone to absorption by rain drops and they get reflected by obstacles.

Due to the long transmission range of the radio waves, interference between transmissions is a problem that needs to be addressed.