ABSTRACT
Electromagnetic waves always consist of two orthogonal vectorial components, the electric and magnetic fields, whether they are in wireless or guided media. The interdependence and dynamics of the electromagnetic fields and the formation and propagation of plane waves are assumed, which is important for the radiation, guiding, and propagation through either wireless or guided media. EM radiation is the electrodynamics of the electric and magnetic fields. Both components obey the principle of superposition when the medium in which they behave is linear. Maxwell derived a waveform of the electric and magnetic equations that constitute the wave-like nature of the electric and magnetic fields and their symmetric property. The generated electric and magnetic fields are radiated away from these sources and can propagate large distances to the receiving antennas—away from the sources, that is, in source-free regions of space. This chapter describes the time-varying electric and magnetic (EM) fields. The introduction presents an overview of key concepts discussed in this book.
