Leaky waves can explain observed phenomena associated with both antennas and fundamental electromagnetic propagation with minimal numerical calculation. The subject is of current interest as various forms of leaky-wave antennas continue to be developed. Also, the underlying theory is proving useful to explain new phenomena such as giant transmission through arrays of sub-wavelength holes, a discovery that has generated considerable interest in the physics and engineering communities. Leaky Waves in Electromagnetics is the first book of its kind to provide a unified treatment of the theory and the variety of applications of leaky waves. Topics covered include; the theoretical basis of leaky waves in uniform and periodic structures; and applications in radiation and antennas, scattering, metal and dielectric waveguides, planar structures and complex media.