An Absorber-Based Metamaterial Sensor For Sensing Relative Humidity

Abstract

An absorber-based metamaterial sensor is developed for detecting the relative humidity of the environment by monitoring the reflection spectrum. Considering C band used in air radar systems as a basis, a metamaterial sensor that responds at a frequency of 7.0 GHz is designed. As the relative humidity of the environment increases, the resonance frequency changes linearly. The impact of the width of the region, where the electric field is intensively concentrated, on the sensitivity of the sensor is investigated. The developed and optimized sensor shows a frequency shift of 4.07 MHz against every 1% change in the relative humidity. It was concluded that the thickness of the humidity-sensitive polymer band does not remarkably affect the relative humidity sensitivity of the metamaterial sensor. The proposed sensor can be used for tracking climate and environmental conditions.

Keywords

• c bandı
• eşdeğer devre
• kapton hn filmi
• yüzey akımı
• elektrik alan