Advanced Materials for Electromagnetic Shielding
by Maciej Jaroszewski, Sabu Thomas, Ajay V. Rane
16Metamaterials as Shielding Materials
Yogesh S. Choudhary and N. Gomathi
Department of Chemistry, Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, India
16.1 Introduction
Many materials evolve in the process of overcoming the drawbacks associated with their performance. There are, however, some instances when a material is developed without any prior intention but which is later modified to make use of it for some specific applications. One such trending material with wide applications in various domains is metamaterials. Metamaterials were designed to exploit some unknown science that later turned out to be very useful for different fields including an invisibility cloak, various shielding, and lenses, etc. Metamaterials are ordered macroscopic composite materials with three‐dimensional (3D) or two‐dimensional (2D) or one‐dimensional (1D) periodic/quasi periodic or non‐periodic structures, not available in nature, whose function is due to both their structure and composition. They are designed to produce an optimum combination of two or more responses to specific excitation. The reason why there is such a boom in metamaterials is due to the existence of some unique properties and great applications associated with them. They find wide applications in diverse domains such as telecommunications, medical imaging, defense, etc. A metamaterial is characterized by its electrical permittivity (ε) and the magnetic permeability (μ). The refractive index ...