Over recent years, the interest in using inductive wireless power transmission for many applications has grown. One of the major limitations of this technology is the reduced operating distance. Some recent works have suggested using artificial materials known as metamaterials to improve the power transfer efficiency over distance. Due to their unique electromagnetic properties, such as negative permeability, metamaterials can be used to enhance the evanescent waves of the near field. In the present work, the usage of an electromagnetic metamaterial to increase the inductive coupling by means of enhanced evanescent waves is studied. Analytical calculations and numerical simulations of the proposed metamaterial are presented. The improvement of the power transfer efficiency is supported by empirical evidences. This work is written integrally in the English language.

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I would like to acknowledge and thank my advisors, prof. Eduardo Costa da Silva and prof. Carlos Antonio França Sartori, for supporting me during my studies; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), for the scholarship and support; all my laboratory fellows and professors from the Centro de Estudos em Telecomunicações (CETUC), particularly prof.