Antenna is an array of conductors. It is the interface between radio waves which propagate through electric and space currents in metal conductors. They are required by transmitters and radio receivers to combine its electrical connection to electromagnetic field. Radio waves are electromagnetic waves. They carry signals at the speed of light through air without any transmission loss. They can be classified by operating principles or applications. Antennas are classified as omnidirectional or directional. Other types include whip antenna, dipole antenna, etc. Antennas and propagation act as keys for any radio system. Wave propagation is the study of the ways in which waves travel. The study of radio wave's behavior while traveling from one point to another is known as radio propagation. Most of the topics introduced in this book cover new techniques and the applications of antennas and wave propagation. It aims to shed light on some of the unexplored aspects of this field. It will serve as a valuable source of reference for those interested in antennas and wave propagation.