A Metamaterial-Based Microwave Sensor for Liquid Dielectrics Characterization

Abstract

In this work, we propose a metamaterial-based microwave sensor. The main body of the proposed sensor is a microstrip coupled complementary spiral rectangular resonator (CSRR). At resonance, a strong electric field is established along the sides of the CSRR creating a very sensitive area to change in the nearby of the dielectric environment. The enhanced proposed contactless sensor uses liquid samples placed normal to the sensor surface retained within capillary glass tubes. Quick analysis of the liquid dielectric properties is carried out by simply replacing the capillary tube with a new sample.The introduced liquid sample shifts the resonance frequency and alters the peak attenuation of the CSRR resonance. The liquid sample dielectric properties may be estimated by establishing an empirical relationship between the resonance characteristics and the liquid complex relative permittivity. In this work, we could improve our device by simple changing of the CSRR shape of a recently published work, this makes improvement on the characteristics of the sensor and lower its working frequency to 1.8GHz.

Unorthodox technique in sensing with the metamaterial-based resonator sensor at millimetre frequencies

“…Major developments have been made in sensor technology centred on metamaterials, contributing to the creation of specific metamaterial-based components to detect sample and situation details. Metamaterial resonator-based biosensors have been exploited for various applications such as; distinguishing the branded and unbranded diesel fuel [5], measurements of protein concentration [3], characterisation of dielectric [6], detection of common solid materials [7], displacement sensing [8], liquid's dielectric characterisation [9], characterisation of cooking oils [10], and non-invasive glucose detection [11]- [13].…”

Fast Readout of Split-Ring Resonators Made Simple and Low-Cost for Application in HPLC

“…This effect makes split-ring resonators increasingly attractive for various applications, such as (bio)chemical sensors for the detection of biomarkers in medical applications [1][2][3] and the dielectric characterization of thin films and liquids [4][5][6]. Here, the dielectric characterization of liquids inside a capillary is of particular interest [7][8][9]. The use of liquid chromatography (LC), e.g., high performance/pressure liquid chromatography (HPLC) and ion chromatography (IC), for the physical separation of compounds in a liquid phase is used in a wide variety of applications such as food, drug, and environmental analysis; process monitoring in the chemical industry; and even bioreactors [10][11][12].…”