This workbook provides theoretical basis on the subject of “Propagation of radio waves”. The radiators and wave-guiding ducts, super high frequency units, devices and other systems have been described. Multiple case studies have been shown relating to the operating principles and characteristics of the mentioned systems. At the same time physical processes of radio waves propagated in the terrestrial atmosphere and in the vicinity of the ground surface have been reviewed in this workbook. Multiple practical data have been provided. Radio waves propagation properties in various ranges,including optical and infrared ranges, as well as terrestrial and space radio lines operational properties have been reviewed. The issue of radio waves electromagnetic coupling has been studied. Mathematical results are followed by broad descriptions in this workbook. The workbook is designated for students and graduates receiving education in the area of maintenance of radio equipment, telecommunication and technical domestic services. The workbook can be also useful for researchers, production experts and other reader audience.