Engineering Science 151 is an intermediate level treatment of electromagnetic radiation. It provides a general introduction to the important physical concepts and mathematical methods used in treating all types of wave phenomena, but stresses electromagnetic signal propagation and issues of central importance in electrical engineering. It provides essential background and basic preparation for more advanced work in device physics, microwave and ultra-fast circuitry, antenna design, wireless communication; optics, optical communication and optoelectronics. Topics treated include: electromagnetic properties of matter; electromagnetic wave propagation through free-space and along waveguides; transmission line analysis; ray and beam optics; the eikonal and paraxial equations; characteristics of receiving and transmitting antennae. Applications illustrate critical factors which affect the design and limit the performance of communication systems.