Novel artificial embedded circuit meta-material for design of tunable electro-ferromagnetic permeability medium

Utilizing the available materials in nature, one can easily obtain a dielectric medium with almost any desired permittivity; however, the atoms and molecules of natural materials, or their mixtures, prove to be a rather restrictive set when one tries to achieve a desired permeability at a desired frequency, specially in the Gigahertz range. The ability to design materials with both /spl epsi/ and /spl mu/ parameters would represent tremendous progress in technology. The main challenge in this paper is to design a novel artificial periodic tunable embedded circuit meta-material to successfully present a medium with both dielectric (/spl epsi/) and magnetic (/spl mu/) properties. The building block unit cell of the proposed structure is a miniaturized high Q tank circuit terminated to the ferro-electric material. The transmission line approach and FDTD technique are applied to successfully obtain the constitutive parameters of the periodic meta-material and highlight the unique characteristics of the medium.