Literature Review: Metamaterials in RF and Microwave Applications

A metamaterial is a structure that has been artificially created and has negative refractive index properties that are not present in nature or are difficult to achieve. This property makes the Metamaterials as very popular in the microwave to optical research areas. Now a days many researchers focusing metamaterials to improve the performance of antennas or antenna arrays like improving antenna gain, bandwidth, compactness, etc. Also, metamaterials play major role on developing the novel optical devices for new applications like optical super lenses, perfect absorber, invisible cloaks, etc. This paper focusses the properties of metamaterial, metamaterial structure and the metamaterial applications in RF and microwave areas.