Many individual technological solutions for microwave applications in industries have been developed without a clear pattern for a key strategy to replace conventional industrial technologies. In this work, the author shows how a modular microwave system line for very homogenous microwave fields is originated. "Energy Efficient Microwave Technologies" is designed for engineers and scientists from industry and academic research. The number of applications of this new technology is enormous: In this book, applications in the avionic field are shown as well as new methods in microwave materials processing for composite materials including new quantum aspects on microwave heating.