Radio Frequency EnergyBackgroundElectromagnetic sourcesSimple antennasMore complex antennasAntennas using conducting surfacesSpecialised antennasSummaryMoving Quanta from Place to PlaceIntroduction to Various Propagation EnvironmentsDescribing the Earth's AtmosphereThe TroposphereReflectionWhere We LiveNear Earth PropagationRadio Propagation in a Complex Urban EnvironmentSky-wave PropagationArtificial Sky-wave Propagation