Providing coverage on all aspects of microwave superconductivity this book includes information on: fundamentals, fabrication of thin and thick films, measurement, components, circuits, cryogenic packaging and market potential. The applications examined, using either active or passive circuit elements, include those based on both the older metal-based superconductors, operating at liquid-helium temperatures, and the newer ceramic-based superconductors, operating at liquid-nitrogen temperatures. Applications that are covered in detail include filters, resonators and antennae for wireless communications and military systems, space-based cryoelectronics, RF SQUIDs and DC SQUID amplifiers, NMR and MRI coils, accelerator cavities, and Josephson flux-flow devices in the millimetre and sub-millimetre regimes. This book is intended for use as a textbook in an electrical engineering graduate course in microwave superconductivity or as a reference book for microwave engineers.