A High Sensitivity Microwave Sensor Based on Metamaterial Absorbers
YANG Jie
WANG Jiafu
QU Shaobo
WANG Wenjie
YU Jibao
XU Zhuo
XIA Song
ZHANG Anxue
Abstract：The meta?material absorbers have characteristics of low profile and strong resonance,and can ap-ply to high?sensitivity sensing.This paper designs a microwave metamaterial absorber sensor with the aim of detecting the refractive index of dielectric plates.Through the simulation design and the optimization, the paper obtains a high?absorption absorber structure and analyzes the absorption performance and mecha-nism.The refractive index and thickness of the dielectric plate may result in the resonant frequency and ab-sorption amplitude of the absorber.When thickness is larger than 2mm,the resonant frequency is subject to approximate influence from the refractive index,and the influence of thickness is negligible.Through simulation and parameter fitting,linear function between the resonant frequency and refractive index is ob-tained.The major advantages of the metamaterial absorber sensor are high in sensitivity,high in FoM val-ue and good in linearity.The frequency sensitivity and FoM value achieve 1 592 MHz/RIU and 7.026 9/RIU,respectively.The absorber sensor also has potential application values in thickness and incident angle sensing.
Keywords：meta?materialsabsorbersensorhigh sensitivity
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 95-99 )