Introduction to the Propagation of Radio Waves -- The Earth’s Atmosphere -- Electromagnetic Waves and Propagation Characteristics -- Ionospheric Links -- Terrestrial Fixed Links -- Satellite Links -- Mobile Radio Links -- The Sun and the Solar Activity -- Microphysical Properties of Hydrometeors -- The Frequency Spectrum -- Cross-Polarisation induced by the Atmosphere -- Fresnel Equations -- Ionospheric and Geomagnetic Disturbances associated with Solar Events -- Investigation Methods of the Ionosphere -- The Terrestrial Magnetic Field and the Magnetic Indexes -- Rain Attenuation -- Vegetation Attenuation -- Diffraction Models -- Mobile Radio Measurements -- Directions of Arrival -- Geographical Databases -- Determination of the Electromagnetic Field after Interaction with Structures.This book describes the physical mechanisms involved in the propagation of electromagnetic waves in the radiofrequency range, inside and outside buildings, in the terrestrial and near space environments, with a special focus on mobile radio communication. It combines a theoretical and an experimental approaches with an understanding of the physical environment through adequate formulations of the laws of electromagnetism. It should thus provide the background needed by advanced students and development engineers for the conception of high quality and reliable telecommunication systems.