chapter  8
Radio Wave Propagation Mark Holker
Pages 20

Electromagnetic energy radiates outward from the source, usually an antenna, at approximately the speed of light and is attenuated and infl uenced by the medium through which it travels. Radio communications necessitate launching RF energy into the propagation medium, detecting its presence at some remote point, and recovering the information contained within it while eliminating noise and other adverse factors introduced over the transmission path. An understanding of radio wave propagation is therefore essential in the planning and operation of radio communications systems to ensure that communications can be established and that there is an optimum solution between costs (capital and running) and link availability.