Presents modern ideas about radio engineering as a means of transmitting, receiving, processing and storing information. Historical popes of the development of information technologies in their inextricable unity with the development of communications are described. Initial ideas about the signal and their mathematical models are formed. The most important properties of harmonic oscillations and monochromatic radio waves are considered. The main elements of the radio channel are described. The material is set out in a form available to the high school graduate...