Comparison Between Geometrical Shapes for New Designs of Split Ring Resonators

In electromagnetics, the material’s characteristics can be defined by the permittivity, permeability, and conductivity of different ranges of frequencies, where the refractive index and the impedance can be extracted. In this work, the properties of artificial metamaterials were studied by designing a unit cell of three-dimensional lattice vectors using CST (Computer Simulation Technology). A simulation process was employed to obtain the S-parameters, and the magnetic resonance frequency of several Split Ring Resonators (SRRs) was investigated. Also, the work introduced four new designs of srr, circl-square (c-sq), circl-square-circl resonator (c-sq-c), square-circle resonator (sq-c), and square-circle-square resonator (sq-c-sq). Conventional SRR structures faced challenges operating effectively at higher frequencies due to production difficulties. Scaling down the structure results in narrow split and gap regions, potentially leading to contact issues between metallic regions. Traditional SRR structures were limited to operating within a few gigahertz frequency ranges. SRR structures exhibited electrical resonance for different polarisations and propagation directions. The new design showed a negative response within the (7-12) GHz range and a negative refracted index ranging from (-4.35 to -5.6).

Effective permeability, Effective permittivity, S- parameters, refractive index, metamaterials.

10.52113/2/11.02.2024/131-139