This book is dedicated to modern radars, describing their working principles and providing an overview on recent applications of microwave and mmWave radars for healthcare applications. For many years, the scientific community has put significant effort into the development of advanced microwave and mmWave radar systems for healthcare applications. Young students, researchers, and professionals need a reference book which clearly and concisely describes the main principles of portable radars and identify the relevant applications of this technology. This book is both an entry point for students and researchers new to the topic and a reference for those seeking to explore specific aspects of radar technologies in healthcare. Ultimately, the authors hope to inspire joint efforts directed towards new innovative theories, technologies, techniques, and applications of modern biomedical radar.