The development of communications and information technology could not have been as rapid without the progress in electromagnetic waves and signal processing. This book provides comprehensive insights into this field. It is a complete source of knowledge on its present status as it presents various important topics like wave particles, propagation speed, types of waves, types of signal processing, etc. In this book, using case studies and examples, constant effort has been made to make the understanding of the difficult concepts of signal processing and theories associated with electromagnetic waves as easy and informative as possible.