In a reference to radiating systems on telecommunications I understood:
"The radiating system is the final stage of the transmission channel. It's purpose is to radiate the energy supplied by the transmitter, which brings information to all the recipients or listeners in the area. For that reason it might be its most important element or component, since a good radiating system ensures a communication channel of a quality which should reach all the locations which require coverage with the appropriately suitable signal level. The radiating system can be composed of only one aerial (radar antenna)..."