Toward creating isotropic microwave composites with negative refraction

TL;DR

This paper investigates the theoretical design of isotropic microwave composites with negative refraction by analyzing different particle arrangements and types, demonstrating Omega particles as more promising for achieving negative permittivity and permeability.

Contribution

It introduces an analytical antenna model for split-ring resonators and compares composite materials made with SRR and Omega particles for negative refraction.

Findings

Omega composites are more promising for negative permittivity and permeability.

The antenna model for SRR is validated by simulations.

Material parameters for different composites are calculated.

Abstract

The properties of artificial isotropic microwave composites which would possess simultaneously negative permittivity and permeability are studied theoretically. Four kinds of composites are considered. Two of them concern media with split-ring resonator particles with different particle arrangements. The other two are realized with Omega particles. An analytical antenna model of the electromagnetic behavior of a split-ring resonator (SRR) is suggested and verified by numerical simulations. Next, material parameters of composite media made with SRR or Omega particles are calculated. It is shown that the Omega-composites are more prospective for obtaining negative real values of permittivity and permeability than the split-ring resonators.