Electromagnetic waves play an essential role in many telecommunications systems, and their propagation through transmission lines is the focus of this book.

An effort has been made to include in this study all types of lines that have been used both historically and in contemporary times, i.e., from the well-known two-wire telephone line to fiber optics.

The book is primarily aimed at students of Higher Education. However, it can also serve Engineers and Technicians in the Industry who seek a brief reference to basic knowledge in everyday practice.