This textbook will help students to make connections with the real life engineering problems by providing the theory and practice via several real life engineering application examples. The topics that will be covered range from the fundamentals of electromagnetics to energy systems, including energy harvesting, HVAC System control and Smart Grids. From the subject coverage perspective, this book has timely information needed to understand and present solutions to the challenges that are faced today in several problems in RF/Microwave engineering. Each chapter is specifically designed to introduce the theory with several examples. Application examples at the end of each chapter are added specifically to illustrate students how theory can be implemented in a real life engineering problems. Application examples are taken from real life engineering projects and reflect the author's several years of industrial experience. This is done for students so that they can make a connection between theory and practice and have a better and long term understanding of the subject.