Analysis of the Behavior of Metamaterial Unit Cell with Respect to Change in Its Structural Parameters

Abstract

AbstractMetamaterials perform specific functions. These materials we would not find naturally in nature. These materials have a negative index of refraction. In general, in a metamaterial unit cell, there are split rings at the one side of the substrate and thin wire on the opposite side of the substrate. The split rings are responsible for the negative permeability, and the thin wire is responsible for the negative value of permeability. We discuss the change in resonating frequency of a metamaterial unit cell with respect to change in the geometrical parameter of the metamaterial unit cell. The resonant frequency of a metamaterial unit cell can be controlled by altering its dimension like the gap between the split rings, length and width of the split ring, and width of the strip. The result shows that there is a significant change in the resonant frequency by altering the design parameters and without changing the other parameters of the unit cell. By changing the weight of the split ring, we found a variation of 1.5 GHz in the resonant frequency, and by changing the gap of the split ring, we found a variation of 3 GHz, and by changing the width of the strip, we found no variation in resonant frequency.KeywordsMetamaterialsSplit-ring resonatorPermittivityPermeabilityNegative refractionPhotonic crystal