Microwave properties of superconductors

The major features of the interaction of microwaves with superconductors are discussed and interpreted in terms of simple phenomenological models. Three limiting cases are treated: the "Pippard limit" which usually holds when the normal state mean free path is large; the "London limit" for small normal state mean free path; and thin films. A section is devoted to the nonlinear properties of superconductors and another to recent microwave studies of superconducting tunneling phenomena.