Recent interest in new materials for applications in radio frequency provided strong impetus for measurement techniques to characterize associated electromagnetic material properties. For example, researches on novel engineered composites such as metamaterials, magneto-dielectrics, and various thin film composites, require accurate measurement of their permittivity, permeability and loss factors over a broadband. In many cases, however, traditional measurement techniques developed in the past are not readily available to characterize these new materials either due to measurable bandwidth limitation or stringent sample preparation requirements. With these issues in mind, this book is aimed at introducing new measurement techniques suitable for broadband characterization of recent engineered composites. Specifically, four novel techniques are presented to characterize textured metamaterial volumetric structures, magneto-dielectric mixtures and films, and highly conductive metallo-dielectric films at the microwave regime.