R S Roberts C Eng, FIEE, Sen MIEEEConsultant Electronics Engineer
6.1 Radio Frequency Propagation
Radio frequencies form a small part of a wide range of types of energy transmission by means of electromagnetic fields.
All forms of electromagnetic radiation into space are characterized by four common factors: their speed of propagation in free space is the same (300 × 106 m/s), and they are subject, like light, to the laws of reflection, refraction and attenuation. The primary source of electromagnetic radiant energy is the sun. In this section we consider the small range of frequencies associated with broadcasting of television.
Clarke Maxwell indicated in 1864 that electromagnetic radiation could be established in space by electrical means. ...