An antenna is a system of conductors that serves as the interface between radio waves and the electric currents in metal conductors. It enables transmitters and receivers to connect electrically with the electromagnetic field. Radio waves, which are electromagnetic waves, transmit signals at the speed of light through the air with minimal loss. Antennas can be categorized based on their operating principles or applications, including omnidirectional and directional types, such as whip and dipole antennas. Antennas and wave propagation are fundamental to any radio system. Wave propagation studies how waves travel and behave between points, with radio propagation focusing specifically on radio waves. This book explores advanced techniques and applications in antennas and wave propagation, highlighting new and less-explored areas of the field. It serves as a valuable resource for those interested in the study and application of antennas and wave propagation.