Textbook in PDF format The concept for this book emerged from a webinar on Electromagnetic Waves: Successfully Surfing the Subject that the editor gave on behalf of the IET in June 2020. The concept was that experts in specialist areas of electromagnetics would write each chapter; providing insightful summaries of current developments within their specialisms, and then extrapolating these existing trends in a logical and reasoned fashion to forecast the future technological developments in their fields. The challenge was for them to look ahead by anything up to a century or more