Design of a Compact and High Sensitivity Temperature Sensor Using Metamaterial

Sabah Zemouli,Abdelhafid Chaabi,Houcine Sofiane Talbi

doi:10.1155/2015/301358

Abstract

The present paper aims at sensing the temperature. A sensor metamaterial consisting of two concentric metallic rings and a thin metallic wire deposited on the surface of BaTiO3 substrate is reported. The use of BaTiO3 makes the resonant frequency of the structure shift as the temperature varies and makes the sensor applicable in many fields of applications. Numerical simulations and theoretical results are presented and compared to each other; there was a good agreement between them. This sensor is smaller, easier to fabricate, and very sensitive to the changes in temperatures.

Highlights

In this decade, metamaterials (MTM) or left handed materials (LHM) have attracted much attention among researchers in the microwave communities because of their unusual properties, such as negative permittivity [1], negative permeability [2], and negative refractive index [3, 4]
In [11], Ekmekci and his colleague have studied a double sided square SRR topology for multipurpose sensor operating in X band; this sensor exhibits a negative value of permeability for frequencies close to the magnetic resonance frequency of the SRR structure, whereas our suggested structure exhibits negative permittivity and negative permeability close to the magnetic resonance frequency of the structure; in addition and according to [12] circular SRR can present a higher quality factor compared to square SRR
Because the resonant frequency of the MTM structure is very sensitive to the changes of the capacitive effects which are basically dependent on the resonator’s topology and the substrate’s parameters, we have proposed a structure with a varying dielectric characteristics substrate

Summary

Introduction

Metamaterials (MTM) or left handed materials (LHM) have attracted much attention among researchers in the microwave communities because of their unusual properties, such as negative permittivity [1], negative permeability [2], and negative refractive index [3, 4]. A great interest has been devoted to the application of metamaterials in sensing; hereafter, we have provided some researches in this concern Ishimaru and his colleagues have studied a metamaterial based on surface plasmon resonance (SPR) sensors in GHz regime while the traditional SPR is usually operated in optical domain only [8]. References [13, 14] have studied the application of a Terahertz metamaterial for chemical sensing and [15] have explained how metamaterials can offer solutions to overcome technical limitations of wireless sensors

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