Advances in leaky-wave periodic structures after oliner´s pioneering research

The research activity jointly developed during the last decade between the groups coordinated by P. Lampariello in Europe and by D. R. Jackson in the U.S.A. is reviewed, on the basis of the fruitful scientific interaction had with Prof. Oliner since the Eighties. The main focus here is on advances in leaky waves and leaky-wave antennas based on periodic structures. This involves topics of different nature, such as issues of numerical modeling in periodic Green´s functions, leakage features in metamaterials and other innovative media, and one-dimensional and two-dimensional configurations of printed and planar leaky-wave radiators.