This chapter focuses on the potential of metamaterials in EMC applications. It is organized as follows. In section 4.2, a short overview of electromagnetic compatibility is given. To highlight the relevance of metamaterials in EMC problems, current trends in industrial applications as well as the consequent challenges arising in EMC are described. The cases of transport and telecommunications industries are considered. The two main applications foresighted are filtering and shielding. Section 4.3 focuses on electromagnetic shielding. The performance of shields depends on both their geometric and electrical parameters, and on the characteristics of the incident EM field. Figures of merit to evaluate these performances are given. Examples of three published one-dimensional metamaterial shields based on reflection or absorption are given. In section 4.4, a detailed analysis of a three-dimensional metamaterial cavity is proposed. The contribution of metamaterials highlighted in the concept of subwavelength cavities. The design steps of an appropriate metamaterial for this particular application are given. Finally, the metamaterial designed are applied to the walls of a regular reverberation chamber generally used for EMC tests.
