# Transparent Negative Index of Refraction Metamaterial Using a Wire Array in a Magnetic Host

## TL;DR

This paper reports the creation and measurement of a microwave metamaterial with a negative index of refraction, achieved through a wire array in a magnetic ferrite, enabling potential miniaturized microwave devices.

## Contribution

It introduces a novel simple design of a negative index metamaterial using a wire array in a magnetic host, replacing complex structures for easier fabrication.

## Key findings

- Measured negative index of refraction in 12-18 GHz range
- Demonstrated decoupling of permittivity and permeability
- Enabled potential for miniaturized microwave devices

## Abstract

We have made measurements of microwave transmission over the 12 - 18 GHz range and through a simple metamaterial exhibiting a negative index of refraction. The metamaterial consisted of an array of wires cladded in dielectric embedded in a magnetic ferrite. The ferrite replaced the cut-ring structure usually used to create the negative permeability. The dielectric cladding decoupled the ferrite from the wires, thereby allowing the wire array permittivity to be simultaneously negative with the permeability. The simplicity of the design allows for miniaturization of potential microwave devices based on this metamaterial.